/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:11:31,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:11:31,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:11:31,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:11:31,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:11:31,819 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:11:31,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:11:31,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:11:31,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:11:31,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:11:31,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:11:31,822 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:11:31,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:11:31,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:11:31,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:11:31,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:11:31,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:11:31,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:11:31,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:11:31,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:11:31,824 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:11:31,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:11:31,824 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:11:31,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:11:31,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:11:31,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:11:31,825 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:11:31,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:11:31,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:11:31,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:11:31,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:11:31,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:11:31,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:11:31,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:11:31,826 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:11:31,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:11:31,826 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:11:32,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:11:32,090 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:11:32,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:11:32,092 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:11:32,093 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:11:32,094 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2021-07-13 19:11:32,094 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-07-13 19:11:32,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:11:32,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:11:32,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:11:32,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:11:32,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:11:32,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... [2021-07-13 19:11:32,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... [2021-07-13 19:11:32,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:11:32,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:11:32,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:11:32,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:11:32,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... [2021-07-13 19:11:32,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... [2021-07-13 19:11:32,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... [2021-07-13 19:11:32,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... [2021-07-13 19:11:32,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... [2021-07-13 19:11:32,156 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... [2021-07-13 19:11:32,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... [2021-07-13 19:11:32,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:11:32,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:11:32,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:11:32,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:11:32,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:11:32,225 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:11:32,225 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:11:32,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:11:32,226 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:11:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:11:32,226 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:11:32,226 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:11:32,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:11:32,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:11:32,227 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:11:32,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:11:32,410 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:11:32,411 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:11:32 BoogieIcfgContainer [2021-07-13 19:11:32,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:11:32,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:11:32,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:11:32,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:11:32,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:32" (1/2) ... [2021-07-13 19:11:32,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28d4caf1 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:11:32, skipping insertion in model container [2021-07-13 19:11:32,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:11:32" (2/2) ... [2021-07-13 19:11:32,416 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-07-13 19:11:32,420 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:11:32,420 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:11:32,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:11:32,421 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:11:32,443 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:11:32,470 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:11:32,482 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:11:32,483 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:11:32,483 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:11:32,483 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:11:32,483 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:11:32,483 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:11:32,483 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:11:32,483 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:11:32,489 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-07-13 19:11:32,501 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:11:32,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:32,523 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:32,523 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:32,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:32,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1540416471, now seen corresponding path program 1 times [2021-07-13 19:11:32,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:32,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079284574] [2021-07-13 19:11:32,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:32,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:32,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079284574] [2021-07-13 19:11:32,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079284574] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:32,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:32,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:11:32,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429209704] [2021-07-13 19:11:32,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:11:32,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:11:32,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:11:32,669 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:32,746 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-07-13 19:11:32,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:11:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:11:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:32,757 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:11:32,757 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:11:32,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:11:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:11:32,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-07-13 19:11:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:32,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-07-13 19:11:32,803 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-07-13 19:11:32,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:32,804 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-07-13 19:11:32,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-07-13 19:11:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:11:32,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:32,807 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:32,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:11:32,807 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:32,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:32,811 INFO L82 PathProgramCache]: Analyzing trace with hash -214361416, now seen corresponding path program 1 times [2021-07-13 19:11:32,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:32,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079915706] [2021-07-13 19:11:32,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:32,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:32,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079915706] [2021-07-13 19:11:32,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079915706] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:32,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:32,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:11:32,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757960301] [2021-07-13 19:11:32,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:11:32,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:32,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:11:32,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:11:32,872 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:32,948 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2021-07-13 19:11:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:32,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:11:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:32,949 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:11:32,949 INFO L226 Difference]: Without dead ends: 160 [2021-07-13 19:11:32,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-13 19:11:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2021-07-13 19:11:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-07-13 19:11:32,958 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-07-13 19:11:32,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:32,958 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-07-13 19:11:32,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:32,958 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-07-13 19:11:32,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:11:32,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:32,959 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:32,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:11:32,959 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:32,960 INFO L82 PathProgramCache]: Analyzing trace with hash 110711837, now seen corresponding path program 1 times [2021-07-13 19:11:32,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:32,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114374691] [2021-07-13 19:11:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:32,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:32,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114374691] [2021-07-13 19:11:32,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114374691] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:32,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:32,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:11:32,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775141179] [2021-07-13 19:11:32,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:11:32,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:11:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:11:32,992 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:33,057 INFO L93 Difference]: Finished difference Result 171 states and 385 transitions. [2021-07-13 19:11:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:11:33,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:11:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:33,060 INFO L225 Difference]: With dead ends: 171 [2021-07-13 19:11:33,060 INFO L226 Difference]: Without dead ends: 163 [2021-07-13 19:11:33,060 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-13 19:11:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 116. [2021-07-13 19:11:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.2956521739130435) internal successors, (264), 115 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 264 transitions. [2021-07-13 19:11:33,069 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 264 transitions. Word has length 14 [2021-07-13 19:11:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:33,069 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 264 transitions. [2021-07-13 19:11:33,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 264 transitions. [2021-07-13 19:11:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:11:33,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:33,070 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:33,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:11:33,071 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:33,071 INFO L82 PathProgramCache]: Analyzing trace with hash -632263843, now seen corresponding path program 2 times [2021-07-13 19:11:33,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:33,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486458977] [2021-07-13 19:11:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:33,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:33,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486458977] [2021-07-13 19:11:33,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486458977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:33,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086237073] [2021-07-13 19:11:33,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:33,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:33,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:33,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:11:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:33,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086237073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:33,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:33,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-13 19:11:33,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825327037] [2021-07-13 19:11:33,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:11:33,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:33,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:11:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:11:33,215 INFO L87 Difference]: Start difference. First operand 116 states and 264 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:33,270 INFO L93 Difference]: Finished difference Result 141 states and 326 transitions. [2021-07-13 19:11:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:33,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:11:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:33,272 INFO L225 Difference]: With dead ends: 141 [2021-07-13 19:11:33,272 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:11:33,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:11:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-07-13 19:11:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2941176470588234) internal successors, (234), 102 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2021-07-13 19:11:33,283 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2021-07-13 19:11:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:33,283 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2021-07-13 19:11:33,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,283 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2021-07-13 19:11:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-13 19:11:33,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:33,284 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:33,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:33,486 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:33,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1209640048, now seen corresponding path program 2 times [2021-07-13 19:11:33,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:33,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795850218] [2021-07-13 19:11:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:33,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:33,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795850218] [2021-07-13 19:11:33,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795850218] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:33,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:33,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:11:33,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457160657] [2021-07-13 19:11:33,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:11:33,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:33,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:11:33,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:11:33,534 INFO L87 Difference]: Start difference. First operand 103 states and 234 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:33,567 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2021-07-13 19:11:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:11:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-13 19:11:33,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:33,569 INFO L225 Difference]: With dead ends: 144 [2021-07-13 19:11:33,569 INFO L226 Difference]: Without dead ends: 142 [2021-07-13 19:11:33,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:33,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-13 19:11:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-07-13 19:11:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-07-13 19:11:33,618 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-07-13 19:11:33,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:33,618 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-07-13 19:11:33,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-07-13 19:11:33,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:11:33,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:33,620 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:33,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:11:33,620 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:33,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:33,620 INFO L82 PathProgramCache]: Analyzing trace with hash -10930008, now seen corresponding path program 1 times [2021-07-13 19:11:33,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:33,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958428992] [2021-07-13 19:11:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:33,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:33,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958428992] [2021-07-13 19:11:33,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958428992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:33,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564256246] [2021-07-13 19:11:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:33,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:33,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:33,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564256246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:33,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:33,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-07-13 19:11:33,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011604664] [2021-07-13 19:11:33,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:33,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:33,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:33,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:33,754 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:33,831 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2021-07-13 19:11:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:11:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:11:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:33,833 INFO L225 Difference]: With dead ends: 300 [2021-07-13 19:11:33,837 INFO L226 Difference]: Without dead ends: 286 [2021-07-13 19:11:33,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-13 19:11:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-07-13 19:11:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-07-13 19:11:33,852 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-07-13 19:11:33,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:33,853 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-07-13 19:11:33,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-07-13 19:11:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:11:33,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:33,854 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:34,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:34,065 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:34,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1675583288, now seen corresponding path program 1 times [2021-07-13 19:11:34,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:34,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971641054] [2021-07-13 19:11:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:34,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:34,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:34,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971641054] [2021-07-13 19:11:34,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971641054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:34,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272713088] [2021-07-13 19:11:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:34,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:34,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:34,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272713088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:34,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:34,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-07-13 19:11:34,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145247688] [2021-07-13 19:11:34,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:34,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:34,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:34,197 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:34,247 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-07-13 19:11:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:11:34,247 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:11:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:34,248 INFO L225 Difference]: With dead ends: 248 [2021-07-13 19:11:34,248 INFO L226 Difference]: Without dead ends: 248 [2021-07-13 19:11:34,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-13 19:11:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-07-13 19:11:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-07-13 19:11:34,255 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-07-13 19:11:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:34,255 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-07-13 19:11:34,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-07-13 19:11:34,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:11:34,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:34,260 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:34,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:34,473 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:34,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:34,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1837184638, now seen corresponding path program 2 times [2021-07-13 19:11:34,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:34,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257955499] [2021-07-13 19:11:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:34,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:34,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257955499] [2021-07-13 19:11:34,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257955499] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:34,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:34,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:11:34,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929647553] [2021-07-13 19:11:34,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:11:34,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:34,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:11:34,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:11:34,510 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:34,539 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-07-13 19:11:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:11:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:11:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:34,540 INFO L225 Difference]: With dead ends: 311 [2021-07-13 19:11:34,540 INFO L226 Difference]: Without dead ends: 304 [2021-07-13 19:11:34,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:11:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-13 19:11:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-07-13 19:11:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-07-13 19:11:34,546 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-07-13 19:11:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:34,546 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-07-13 19:11:34,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-07-13 19:11:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:11:34,547 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:34,547 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:34,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:11:34,547 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:34,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:34,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1678798648, now seen corresponding path program 1 times [2021-07-13 19:11:34,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:34,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319409307] [2021-07-13 19:11:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:34,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:34,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319409307] [2021-07-13 19:11:34,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319409307] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:34,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:34,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:11:34,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731952256] [2021-07-13 19:11:34,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:11:34,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:11:34,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:11:34,572 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:34,603 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-07-13 19:11:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:11:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:11:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:34,605 INFO L225 Difference]: With dead ends: 243 [2021-07-13 19:11:34,605 INFO L226 Difference]: Without dead ends: 208 [2021-07-13 19:11:34,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:11:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-13 19:11:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-07-13 19:11:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.4009661835748792) internal successors, (497), 207 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-07-13 19:11:34,611 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-07-13 19:11:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:34,612 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-07-13 19:11:34,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-07-13 19:11:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:11:34,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:34,612 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:34,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:11:34,613 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:34,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1963262152, now seen corresponding path program 2 times [2021-07-13 19:11:34,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:34,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812045934] [2021-07-13 19:11:34,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:34,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:34,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812045934] [2021-07-13 19:11:34,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812045934] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:34,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:34,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:11:34,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365912352] [2021-07-13 19:11:34,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:34,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:34,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:34,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:34,669 INFO L87 Difference]: Start difference. First operand 208 states and 497 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:34,702 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-07-13 19:11:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:34,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:11:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:34,703 INFO L225 Difference]: With dead ends: 222 [2021-07-13 19:11:34,703 INFO L226 Difference]: Without dead ends: 222 [2021-07-13 19:11:34,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-13 19:11:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-07-13 19:11:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3846153846153846) internal successors, (527), 221 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-07-13 19:11:34,708 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-07-13 19:11:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:34,708 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-07-13 19:11:34,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-07-13 19:11:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:34,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:34,709 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:34,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:11:34,709 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:34,710 INFO L82 PathProgramCache]: Analyzing trace with hash 215291064, now seen corresponding path program 3 times [2021-07-13 19:11:34,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:34,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860070057] [2021-07-13 19:11:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:34,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:34,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860070057] [2021-07-13 19:11:34,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860070057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:34,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404197545] [2021-07-13 19:11:34,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:34,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:11:34,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:34,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:35,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404197545] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:35,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:11:35,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-07-13 19:11:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227226808] [2021-07-13 19:11:35,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:35,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:35,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:35,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:35,033 INFO L87 Difference]: Start difference. First operand 222 states and 527 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:35,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:35,188 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-07-13 19:11:35,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:11:35,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:35,190 INFO L225 Difference]: With dead ends: 421 [2021-07-13 19:11:35,190 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:11:35,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:11:35,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:11:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-07-13 19:11:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-07-13 19:11:35,196 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-07-13 19:11:35,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:35,197 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-07-13 19:11:35,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:35,197 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-07-13 19:11:35,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:35,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:35,197 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:35,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:35,419 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2043788104, now seen corresponding path program 4 times [2021-07-13 19:11:35,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:35,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584267284] [2021-07-13 19:11:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:35,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:35,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584267284] [2021-07-13 19:11:35,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584267284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:35,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831093324] [2021-07-13 19:11:35,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:35,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:35,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:35,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:11:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:35,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831093324] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:35,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:11:35,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-07-13 19:11:35,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496841869] [2021-07-13 19:11:35,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:35,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:35,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:35,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:35,569 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:35,676 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-07-13 19:11:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:35,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:35,678 INFO L225 Difference]: With dead ends: 592 [2021-07-13 19:11:35,678 INFO L226 Difference]: Without dead ends: 592 [2021-07-13 19:11:35,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-13 19:11:35,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-07-13 19:11:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.541333333333333) internal successors, (953), 375 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-07-13 19:11:35,688 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-07-13 19:11:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:35,688 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-07-13 19:11:35,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:35,688 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-07-13 19:11:35,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:35,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:35,689 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:35,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:11:35,905 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1610963566, now seen corresponding path program 5 times [2021-07-13 19:11:35,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:35,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36836271] [2021-07-13 19:11:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:35,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:35,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36836271] [2021-07-13 19:11:35,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36836271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:35,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52132731] [2021-07-13 19:11:35,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:11:35,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:11:35,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:36,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52132731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:36,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:36,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-13 19:11:36,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053938946] [2021-07-13 19:11:36,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:36,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:36,027 INFO L87 Difference]: Start difference. First operand 376 states and 953 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:36,124 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-07-13 19:11:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:36,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:36,128 INFO L225 Difference]: With dead ends: 751 [2021-07-13 19:11:36,128 INFO L226 Difference]: Without dead ends: 751 [2021-07-13 19:11:36,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:36,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-07-13 19:11:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-07-13 19:11:36,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.659695817490494) internal successors, (1399), 526 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-07-13 19:11:36,140 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-07-13 19:11:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:36,140 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-07-13 19:11:36,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-07-13 19:11:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:36,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:36,141 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:36,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:36,357 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1876435461, now seen corresponding path program 6 times [2021-07-13 19:11:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:36,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917425409] [2021-07-13 19:11:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:36,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:36,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917425409] [2021-07-13 19:11:36,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917425409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:36,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166207097] [2021-07-13 19:11:36,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:36,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:11:36,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:36,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:36,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:36,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166207097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:36,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:36,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-07-13 19:11:36,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29704909] [2021-07-13 19:11:36,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:36,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:36,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:36,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:36,456 INFO L87 Difference]: Start difference. First operand 527 states and 1399 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:36,528 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-07-13 19:11:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:11:36,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:36,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:36,532 INFO L225 Difference]: With dead ends: 960 [2021-07-13 19:11:36,532 INFO L226 Difference]: Without dead ends: 956 [2021-07-13 19:11:36,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:36,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-07-13 19:11:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-07-13 19:11:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.752551020408163) internal successors, (2158), 784 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-07-13 19:11:36,551 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-07-13 19:11:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:36,551 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-07-13 19:11:36,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-07-13 19:11:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:36,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:36,553 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:36,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:36,774 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:36,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:36,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1254555051, now seen corresponding path program 7 times [2021-07-13 19:11:36,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:36,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801484197] [2021-07-13 19:11:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:36,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:36,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:36,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801484197] [2021-07-13 19:11:36,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801484197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:36,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995462241] [2021-07-13 19:11:36,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:36,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:36,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:36,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:36,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995462241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:36,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:36,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-07-13 19:11:36,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476055285] [2021-07-13 19:11:36,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:36,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:36,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:36,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:36,886 INFO L87 Difference]: Start difference. First operand 785 states and 2158 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:36,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:36,962 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-07-13 19:11:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:36,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:36,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:36,966 INFO L225 Difference]: With dead ends: 966 [2021-07-13 19:11:36,966 INFO L226 Difference]: Without dead ends: 966 [2021-07-13 19:11:36,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-07-13 19:11:36,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-07-13 19:11:36,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.739795918367347) internal successors, (2148), 784 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-07-13 19:11:36,985 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-07-13 19:11:36,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:36,985 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-07-13 19:11:36,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-07-13 19:11:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:36,986 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:36,986 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:37,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:11:37,201 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:37,201 INFO L82 PathProgramCache]: Analyzing trace with hash 322738604, now seen corresponding path program 8 times [2021-07-13 19:11:37,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:37,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460856746] [2021-07-13 19:11:37,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:37,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:37,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:37,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460856746] [2021-07-13 19:11:37,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460856746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:37,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185926133] [2021-07-13 19:11:37,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:37,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:37,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:37,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:37,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:37,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185926133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:37,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:37,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:11:37,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60388564] [2021-07-13 19:11:37,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:37,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:37,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:37,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:37,311 INFO L87 Difference]: Start difference. First operand 785 states and 2148 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:37,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:37,359 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-07-13 19:11:37,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:37,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:37,363 INFO L225 Difference]: With dead ends: 861 [2021-07-13 19:11:37,363 INFO L226 Difference]: Without dead ends: 858 [2021-07-13 19:11:37,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-07-13 19:11:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-07-13 19:11:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7346153846153847) internal successors, (2133), 780 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-07-13 19:11:37,378 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-07-13 19:11:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:37,378 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-07-13 19:11:37,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-07-13 19:11:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:37,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:37,379 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:37,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:37,593 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1057166664, now seen corresponding path program 9 times [2021-07-13 19:11:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:37,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080772344] [2021-07-13 19:11:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:37,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:37,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080772344] [2021-07-13 19:11:37,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080772344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:37,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612860945] [2021-07-13 19:11:37,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:37,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:11:37,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:37,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:37,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612860945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:37,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:37,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:11:37,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667573935] [2021-07-13 19:11:37,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:37,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:37,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:37,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:37,676 INFO L87 Difference]: Start difference. First operand 781 states and 2133 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:37,769 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-07-13 19:11:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:11:37,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:37,773 INFO L225 Difference]: With dead ends: 1114 [2021-07-13 19:11:37,773 INFO L226 Difference]: Without dead ends: 1114 [2021-07-13 19:11:37,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-07-13 19:11:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-07-13 19:11:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.771714922048998) internal successors, (2489), 898 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-07-13 19:11:37,791 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-07-13 19:11:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:37,791 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-07-13 19:11:37,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-07-13 19:11:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:37,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:37,793 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:38,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:11:38,009 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1634542869, now seen corresponding path program 10 times [2021-07-13 19:11:38,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:38,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645768472] [2021-07-13 19:11:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:38,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:38,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645768472] [2021-07-13 19:11:38,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645768472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:38,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748348918] [2021-07-13 19:11:38,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:38,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:38,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:38,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748348918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:38,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:38,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-07-13 19:11:38,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65419802] [2021-07-13 19:11:38,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:38,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:38,103 INFO L87 Difference]: Start difference. First operand 899 states and 2489 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:38,172 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-07-13 19:11:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:11:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:38,177 INFO L225 Difference]: With dead ends: 1380 [2021-07-13 19:11:38,178 INFO L226 Difference]: Without dead ends: 1370 [2021-07-13 19:11:38,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:38,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-07-13 19:11:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-07-13 19:11:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8247758761206194) internal successors, (3466), 1227 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-07-13 19:11:38,202 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-07-13 19:11:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:38,202 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-07-13 19:11:38,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-07-13 19:11:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:38,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:38,204 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:38,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:11:38,421 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:38,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:38,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2038544017, now seen corresponding path program 11 times [2021-07-13 19:11:38,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:38,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559929040] [2021-07-13 19:11:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:38,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:38,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559929040] [2021-07-13 19:11:38,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559929040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:38,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282533995] [2021-07-13 19:11:38,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:38,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:11:38,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:38,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:38,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282533995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:38,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:38,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-07-13 19:11:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752618830] [2021-07-13 19:11:38,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:38,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:38,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:38,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:38,505 INFO L87 Difference]: Start difference. First operand 1228 states and 3466 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:38,576 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-07-13 19:11:38,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:38,582 INFO L225 Difference]: With dead ends: 1400 [2021-07-13 19:11:38,582 INFO L226 Difference]: Without dead ends: 1400 [2021-07-13 19:11:38,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-07-13 19:11:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-07-13 19:11:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.814755412991179) internal successors, (3510), 1247 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-07-13 19:11:38,604 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-07-13 19:11:38,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:38,604 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-07-13 19:11:38,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-07-13 19:11:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:38,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:38,606 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:38,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:11:38,821 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1106727570, now seen corresponding path program 12 times [2021-07-13 19:11:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:38,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240649102] [2021-07-13 19:11:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:38,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:38,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240649102] [2021-07-13 19:11:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240649102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:38,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745969085] [2021-07-13 19:11:38,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:38,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:11:38,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:38,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:38,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:38,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745969085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:38,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:38,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:11:38,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133578078] [2021-07-13 19:11:38,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:38,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:38,909 INFO L87 Difference]: Start difference. First operand 1248 states and 3510 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:38,956 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-07-13 19:11:38,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:38,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:38,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:38,961 INFO L225 Difference]: With dead ends: 1485 [2021-07-13 19:11:38,962 INFO L226 Difference]: Without dead ends: 1482 [2021-07-13 19:11:38,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-07-13 19:11:38,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-07-13 19:11:38,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.8086469175340274) internal successors, (3508), 1249 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-07-13 19:11:38,994 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-07-13 19:11:38,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:38,994 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-07-13 19:11:38,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-07-13 19:11:38,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:38,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:38,996 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:39,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:39,201 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash 400971561, now seen corresponding path program 13 times [2021-07-13 19:11:39,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:39,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686624164] [2021-07-13 19:11:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:39,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:39,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686624164] [2021-07-13 19:11:39,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686624164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093617823] [2021-07-13 19:11:39,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:39,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:39,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:39,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093617823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:39,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:39,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-13 19:11:39,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339615208] [2021-07-13 19:11:39,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:39,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:39,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:39,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:39,299 INFO L87 Difference]: Start difference. First operand 1250 states and 3508 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:39,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:39,403 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-07-13 19:11:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:39,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:39,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:39,409 INFO L225 Difference]: With dead ends: 1426 [2021-07-13 19:11:39,409 INFO L226 Difference]: Without dead ends: 1426 [2021-07-13 19:11:39,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-07-13 19:11:39,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-07-13 19:11:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.8003355704697985) internal successors, (3338), 1192 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-07-13 19:11:39,431 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-07-13 19:11:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:39,431 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-07-13 19:11:39,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-07-13 19:11:39,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:11:39,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:39,434 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:39,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:39,650 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1313790136, now seen corresponding path program 14 times [2021-07-13 19:11:39,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:39,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498267126] [2021-07-13 19:11:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:39,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:39,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498267126] [2021-07-13 19:11:39,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498267126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:39,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126838562] [2021-07-13 19:11:39,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:39,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:39,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:39,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:39,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126838562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:39,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:39,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:11:39,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779950415] [2021-07-13 19:11:39,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:39,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:39,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:39,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:39,749 INFO L87 Difference]: Start difference. First operand 1193 states and 3338 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:39,812 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-07-13 19:11:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:11:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:11:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:39,817 INFO L225 Difference]: With dead ends: 1396 [2021-07-13 19:11:39,817 INFO L226 Difference]: Without dead ends: 1382 [2021-07-13 19:11:39,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-07-13 19:11:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-07-13 19:11:39,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.7779605263157894) internal successors, (3378), 1216 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-07-13 19:11:39,837 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-07-13 19:11:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:39,837 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-07-13 19:11:39,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-07-13 19:11:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:39,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:39,857 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:40,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:11:40,069 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:40,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1149983723, now seen corresponding path program 1 times [2021-07-13 19:11:40,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:40,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083372073] [2021-07-13 19:11:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:40,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:40,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083372073] [2021-07-13 19:11:40,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083372073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:40,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527196998] [2021-07-13 19:11:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:40,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:40,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527196998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:40,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:40,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:11:40,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230725234] [2021-07-13 19:11:40,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:11:40,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:40,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:11:40,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:11:40,189 INFO L87 Difference]: Start difference. First operand 1217 states and 3378 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:40,425 INFO L93 Difference]: Finished difference Result 1620 states and 4189 transitions. [2021-07-13 19:11:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:11:40,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:40,431 INFO L225 Difference]: With dead ends: 1620 [2021-07-13 19:11:40,432 INFO L226 Difference]: Without dead ends: 1620 [2021-07-13 19:11:40,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 146.3ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:11:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-07-13 19:11:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1363. [2021-07-13 19:11:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.6908957415565347) internal successors, (3665), 1362 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3665 transitions. [2021-07-13 19:11:40,454 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3665 transitions. Word has length 23 [2021-07-13 19:11:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:40,454 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3665 transitions. [2021-07-13 19:11:40,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3665 transitions. [2021-07-13 19:11:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:40,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:40,456 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:40,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:40,669 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:40,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1870263307, now seen corresponding path program 15 times [2021-07-13 19:11:40,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:40,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71641246] [2021-07-13 19:11:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:40,699 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:40,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:40,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71641246] [2021-07-13 19:11:40,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71641246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:40,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439516744] [2021-07-13 19:11:40,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:40,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:11:40,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:40,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:40,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:40,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439516744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:40,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:40,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:11:40,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383650101] [2021-07-13 19:11:40,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:40,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:40,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:40,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:40,767 INFO L87 Difference]: Start difference. First operand 1363 states and 3665 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:40,826 INFO L93 Difference]: Finished difference Result 1903 states and 5027 transitions. [2021-07-13 19:11:40,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:40,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:40,844 INFO L225 Difference]: With dead ends: 1903 [2021-07-13 19:11:40,844 INFO L226 Difference]: Without dead ends: 1896 [2021-07-13 19:11:40,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-07-13 19:11:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1797. [2021-07-13 19:11:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1796 states have (on average 2.693207126948775) internal successors, (4837), 1796 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 4837 transitions. [2021-07-13 19:11:40,896 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 4837 transitions. Word has length 23 [2021-07-13 19:11:40,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:40,896 INFO L482 AbstractCegarLoop]: Abstraction has 1797 states and 4837 transitions. [2021-07-13 19:11:40,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:40,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 4837 transitions. [2021-07-13 19:11:40,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:40,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:40,899 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:41,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:11:41,116 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:41,117 INFO L82 PathProgramCache]: Analyzing trace with hash -877014541, now seen corresponding path program 16 times [2021-07-13 19:11:41,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:41,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262387462] [2021-07-13 19:11:41,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:11:41,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:41,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262387462] [2021-07-13 19:11:41,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262387462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:41,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417875504] [2021-07-13 19:11:41,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:41,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:11:41,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417875504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:41,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:41,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:11:41,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412297841] [2021-07-13 19:11:41,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:41,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:41,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:41,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:41,214 INFO L87 Difference]: Start difference. First operand 1797 states and 4837 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:41,270 INFO L93 Difference]: Finished difference Result 2099 states and 5565 transitions. [2021-07-13 19:11:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:41,274 INFO L225 Difference]: With dead ends: 2099 [2021-07-13 19:11:41,274 INFO L226 Difference]: Without dead ends: 2092 [2021-07-13 19:11:41,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:41,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-07-13 19:11:41,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1863. [2021-07-13 19:11:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.700859291084855) internal successors, (5029), 1862 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5029 transitions. [2021-07-13 19:11:41,308 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5029 transitions. Word has length 23 [2021-07-13 19:11:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:41,308 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5029 transitions. [2021-07-13 19:11:41,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5029 transitions. [2021-07-13 19:11:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:41,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:41,311 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:41,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:11:41,525 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:41,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662741, now seen corresponding path program 1 times [2021-07-13 19:11:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:41,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131745973] [2021-07-13 19:11:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:41,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:41,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131745973] [2021-07-13 19:11:41,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131745973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:41,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700506835] [2021-07-13 19:11:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:41,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:41,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:41,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700506835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:41,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:41,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:11:41,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709578670] [2021-07-13 19:11:41,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:41,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:41,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:41,644 INFO L87 Difference]: Start difference. First operand 1863 states and 5029 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:41,816 INFO L93 Difference]: Finished difference Result 1530 states and 4049 transitions. [2021-07-13 19:11:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:41,819 INFO L225 Difference]: With dead ends: 1530 [2021-07-13 19:11:41,819 INFO L226 Difference]: Without dead ends: 1391 [2021-07-13 19:11:41,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-07-13 19:11:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1357. [2021-07-13 19:11:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.7109144542772863) internal successors, (3676), 1356 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3676 transitions. [2021-07-13 19:11:41,837 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3676 transitions. Word has length 23 [2021-07-13 19:11:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:41,838 INFO L482 AbstractCegarLoop]: Abstraction has 1357 states and 3676 transitions. [2021-07-13 19:11:41,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3676 transitions. [2021-07-13 19:11:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:41,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:41,839 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:42,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:11:42,053 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:42,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2072587809, now seen corresponding path program 2 times [2021-07-13 19:11:42,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:42,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225719201] [2021-07-13 19:11:42,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:42,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:42,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225719201] [2021-07-13 19:11:42,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225719201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:42,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298916163] [2021-07-13 19:11:42,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:42,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:42,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:42,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:42,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:42,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298916163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:42,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:42,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:11:42,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880212094] [2021-07-13 19:11:42,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:42,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:42,208 INFO L87 Difference]: Start difference. First operand 1357 states and 3676 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:42,324 INFO L93 Difference]: Finished difference Result 1538 states and 4021 transitions. [2021-07-13 19:11:42,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:11:42,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:42,327 INFO L225 Difference]: With dead ends: 1538 [2021-07-13 19:11:42,327 INFO L226 Difference]: Without dead ends: 1538 [2021-07-13 19:11:42,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:42,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-07-13 19:11:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1383. [2021-07-13 19:11:42,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.703328509406657) internal successors, (3736), 1382 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3736 transitions. [2021-07-13 19:11:42,348 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3736 transitions. Word has length 23 [2021-07-13 19:11:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:42,348 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 3736 transitions. [2021-07-13 19:11:42,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:42,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3736 transitions. [2021-07-13 19:11:42,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:42,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:42,350 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:42,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:11:42,565 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1575503784, now seen corresponding path program 2 times [2021-07-13 19:11:42,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:42,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840833536] [2021-07-13 19:11:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:42,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:42,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840833536] [2021-07-13 19:11:42,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840833536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:42,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203761000] [2021-07-13 19:11:42,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:42,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:42,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:11:42,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:42,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203761000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:42,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:42,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-13 19:11:42,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108072006] [2021-07-13 19:11:42,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:42,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:42,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:42,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:42,668 INFO L87 Difference]: Start difference. First operand 1383 states and 3736 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:42,745 INFO L93 Difference]: Finished difference Result 1546 states and 4028 transitions. [2021-07-13 19:11:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:11:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:42,748 INFO L225 Difference]: With dead ends: 1546 [2021-07-13 19:11:42,748 INFO L226 Difference]: Without dead ends: 1526 [2021-07-13 19:11:42,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:42,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-07-13 19:11:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1395. [2021-07-13 19:11:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.6886657101865135) internal successors, (3748), 1394 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3748 transitions. [2021-07-13 19:11:42,766 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3748 transitions. Word has length 23 [2021-07-13 19:11:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:42,767 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3748 transitions. [2021-07-13 19:11:42,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3748 transitions. [2021-07-13 19:11:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:42,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:42,769 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:42,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:42,984 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1556804075, now seen corresponding path program 3 times [2021-07-13 19:11:42,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:42,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398239268] [2021-07-13 19:11:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:43,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:43,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398239268] [2021-07-13 19:11:43,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398239268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:43,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143908430] [2021-07-13 19:11:43,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:43,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:11:43,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:43,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:43,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143908430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:43,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:43,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:11:43,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889242897] [2021-07-13 19:11:43,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:43,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:43,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:43,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:43,115 INFO L87 Difference]: Start difference. First operand 1395 states and 3748 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:43,271 INFO L93 Difference]: Finished difference Result 1913 states and 4928 transitions. [2021-07-13 19:11:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:11:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:43,275 INFO L225 Difference]: With dead ends: 1913 [2021-07-13 19:11:43,275 INFO L226 Difference]: Without dead ends: 1913 [2021-07-13 19:11:43,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-07-13 19:11:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1544. [2021-07-13 19:11:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.6824368114063515) internal successors, (4139), 1543 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4139 transitions. [2021-07-13 19:11:43,299 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4139 transitions. Word has length 23 [2021-07-13 19:11:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:43,299 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4139 transitions. [2021-07-13 19:11:43,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4139 transitions. [2021-07-13 19:11:43,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:43,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:43,302 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:43,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:43,517 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:43,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:43,517 INFO L82 PathProgramCache]: Analyzing trace with hash -56471083, now seen corresponding path program 3 times [2021-07-13 19:11:43,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:43,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975276719] [2021-07-13 19:11:43,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:43,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:43,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975276719] [2021-07-13 19:11:43,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975276719] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:43,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:43,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:11:43,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104901645] [2021-07-13 19:11:43,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:43,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:43,564 INFO L87 Difference]: Start difference. First operand 1544 states and 4139 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:43,608 INFO L93 Difference]: Finished difference Result 1492 states and 3879 transitions. [2021-07-13 19:11:43,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:43,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:43,611 INFO L225 Difference]: With dead ends: 1492 [2021-07-13 19:11:43,611 INFO L226 Difference]: Without dead ends: 1411 [2021-07-13 19:11:43,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.0ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:43,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-07-13 19:11:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1381. [2021-07-13 19:11:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.6231884057971016) internal successors, (3620), 1380 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 3620 transitions. [2021-07-13 19:11:43,629 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 3620 transitions. Word has length 23 [2021-07-13 19:11:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:43,629 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 3620 transitions. [2021-07-13 19:11:43,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 3620 transitions. [2021-07-13 19:11:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:43,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:43,631 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:43,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-07-13 19:11:43,631 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:43,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:43,632 INFO L82 PathProgramCache]: Analyzing trace with hash -670007263, now seen corresponding path program 4 times [2021-07-13 19:11:43,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:43,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206124878] [2021-07-13 19:11:43,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:11:43,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:43,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206124878] [2021-07-13 19:11:43,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206124878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:43,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910442854] [2021-07-13 19:11:43,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:43,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:43,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:43,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:43,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:43,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910442854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:43,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:43,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:11:43,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595362320] [2021-07-13 19:11:43,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:43,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:43,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:43,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:43,754 INFO L87 Difference]: Start difference. First operand 1381 states and 3620 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:43,924 INFO L93 Difference]: Finished difference Result 1624 states and 4116 transitions. [2021-07-13 19:11:43,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:11:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:43,939 INFO L225 Difference]: With dead ends: 1624 [2021-07-13 19:11:43,939 INFO L226 Difference]: Without dead ends: 1612 [2021-07-13 19:11:43,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:11:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-07-13 19:11:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1413. [2021-07-13 19:11:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.6203966005665724) internal successors, (3700), 1412 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3700 transitions. [2021-07-13 19:11:43,968 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3700 transitions. Word has length 23 [2021-07-13 19:11:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:43,968 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3700 transitions. [2021-07-13 19:11:43,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3700 transitions. [2021-07-13 19:11:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:43,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:43,971 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:44,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 19:11:44,185 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash -819089257, now seen corresponding path program 17 times [2021-07-13 19:11:44,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:44,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557291564] [2021-07-13 19:11:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:44,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557291564] [2021-07-13 19:11:44,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557291564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136212763] [2021-07-13 19:11:44,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:44,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:11:44,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:44,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136212763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:44,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:44,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2021-07-13 19:11:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949564268] [2021-07-13 19:11:44,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:11:44,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:44,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:11:44,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:44,339 INFO L87 Difference]: Start difference. First operand 1413 states and 3700 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:44,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:44,801 INFO L93 Difference]: Finished difference Result 2940 states and 7390 transitions. [2021-07-13 19:11:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:11:44,802 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:44,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:44,807 INFO L225 Difference]: With dead ends: 2940 [2021-07-13 19:11:44,807 INFO L226 Difference]: Without dead ends: 2926 [2021-07-13 19:11:44,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:11:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-07-13 19:11:44,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1583. [2021-07-13 19:11:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 2.618204804045512) internal successors, (4142), 1582 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:44,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4142 transitions. [2021-07-13 19:11:44,836 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4142 transitions. Word has length 23 [2021-07-13 19:11:44,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:44,836 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 4142 transitions. [2021-07-13 19:11:44,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:44,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4142 transitions. [2021-07-13 19:11:44,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:44,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:44,838 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:45,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:45,054 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:45,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:45,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1471910071, now seen corresponding path program 5 times [2021-07-13 19:11:45,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:45,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039301180] [2021-07-13 19:11:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:45,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:45,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039301180] [2021-07-13 19:11:45,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039301180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:45,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083265957] [2021-07-13 19:11:45,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:45,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:11:45,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:45,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:45,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:45,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083265957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:45,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:45,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-13 19:11:45,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57297661] [2021-07-13 19:11:45,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:11:45,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:45,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:11:45,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:11:45,171 INFO L87 Difference]: Start difference. First operand 1583 states and 4142 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:45,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:45,423 INFO L93 Difference]: Finished difference Result 1758 states and 4409 transitions. [2021-07-13 19:11:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:11:45,424 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:45,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:45,426 INFO L225 Difference]: With dead ends: 1758 [2021-07-13 19:11:45,426 INFO L226 Difference]: Without dead ends: 1746 [2021-07-13 19:11:45,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:11:45,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-07-13 19:11:45,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1437. [2021-07-13 19:11:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.597493036211699) internal successors, (3730), 1436 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3730 transitions. [2021-07-13 19:11:45,444 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3730 transitions. Word has length 23 [2021-07-13 19:11:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:45,444 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 3730 transitions. [2021-07-13 19:11:45,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3730 transitions. [2021-07-13 19:11:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:11:45,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:45,445 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:45,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-13 19:11:45,646 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1618050889, now seen corresponding path program 4 times [2021-07-13 19:11:45,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:45,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46882826] [2021-07-13 19:11:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:45,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:45,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:45,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46882826] [2021-07-13 19:11:45,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46882826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:45,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329332334] [2021-07-13 19:11:45,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:45,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:45,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:45,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:45,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:45,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329332334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:45,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:45,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-13 19:11:45,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231947614] [2021-07-13 19:11:45,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:45,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:45,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:45,796 INFO L87 Difference]: Start difference. First operand 1437 states and 3730 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:45,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:45,901 INFO L93 Difference]: Finished difference Result 1432 states and 3672 transitions. [2021-07-13 19:11:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:11:45,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:45,910 INFO L225 Difference]: With dead ends: 1432 [2021-07-13 19:11:45,910 INFO L226 Difference]: Without dead ends: 1365 [2021-07-13 19:11:45,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-07-13 19:11:45,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1356. [2021-07-13 19:11:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.607380073800738) internal successors, (3533), 1355 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3533 transitions. [2021-07-13 19:11:45,931 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3533 transitions. Word has length 23 [2021-07-13 19:11:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:45,931 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 3533 transitions. [2021-07-13 19:11:45,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3533 transitions. [2021-07-13 19:11:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:45,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:45,933 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:46,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:46,148 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2131794949, now seen corresponding path program 18 times [2021-07-13 19:11:46,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:46,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956209620] [2021-07-13 19:11:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:46,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:46,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956209620] [2021-07-13 19:11:46,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956209620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:46,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140356782] [2021-07-13 19:11:46,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:46,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:11:46,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:46,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:46,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:46,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140356782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:46,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:46,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:11:46,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319370855] [2021-07-13 19:11:46,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:46,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:46,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:46,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:46,284 INFO L87 Difference]: Start difference. First operand 1356 states and 3533 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:46,409 INFO L93 Difference]: Finished difference Result 1715 states and 4244 transitions. [2021-07-13 19:11:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:46,412 INFO L225 Difference]: With dead ends: 1715 [2021-07-13 19:11:46,412 INFO L226 Difference]: Without dead ends: 1715 [2021-07-13 19:11:46,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:46,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-07-13 19:11:46,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1404. [2021-07-13 19:11:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.6129722024233786) internal successors, (3666), 1403 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:46,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3666 transitions. [2021-07-13 19:11:46,430 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3666 transitions. Word has length 26 [2021-07-13 19:11:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:46,430 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 3666 transitions. [2021-07-13 19:11:46,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:46,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3666 transitions. [2021-07-13 19:11:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:46,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:46,432 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:46,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 19:11:46,637 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:46,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:46,637 INFO L82 PathProgramCache]: Analyzing trace with hash 761307032, now seen corresponding path program 19 times [2021-07-13 19:11:46,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:46,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503525800] [2021-07-13 19:11:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:46,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:46,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503525800] [2021-07-13 19:11:46,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503525800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:46,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648729325] [2021-07-13 19:11:46,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:46,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:46,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:46,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648729325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:46,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:46,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-13 19:11:46,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625372974] [2021-07-13 19:11:46,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:46,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:46,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:46,741 INFO L87 Difference]: Start difference. First operand 1404 states and 3666 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:46,834 INFO L93 Difference]: Finished difference Result 2473 states and 6334 transitions. [2021-07-13 19:11:46,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:46,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:46,838 INFO L225 Difference]: With dead ends: 2473 [2021-07-13 19:11:46,838 INFO L226 Difference]: Without dead ends: 2455 [2021-07-13 19:11:46,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-07-13 19:11:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2018. [2021-07-13 19:11:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.707982151710461) internal successors, (5462), 2017 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5462 transitions. [2021-07-13 19:11:46,864 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5462 transitions. Word has length 26 [2021-07-13 19:11:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:46,864 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5462 transitions. [2021-07-13 19:11:46,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5462 transitions. [2021-07-13 19:11:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:46,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:46,867 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:47,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:47,083 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:47,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:47,083 INFO L82 PathProgramCache]: Analyzing trace with hash -195885608, now seen corresponding path program 20 times [2021-07-13 19:11:47,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:47,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015194743] [2021-07-13 19:11:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:47,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015194743] [2021-07-13 19:11:47,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015194743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430053542] [2021-07-13 19:11:47,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:47,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:47,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:47,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:47,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:47,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430053542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:47,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:47,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-13 19:11:47,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395839460] [2021-07-13 19:11:47,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:47,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:47,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:47,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:47,178 INFO L87 Difference]: Start difference. First operand 2018 states and 5462 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:47,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:47,301 INFO L93 Difference]: Finished difference Result 2447 states and 6260 transitions. [2021-07-13 19:11:47,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:47,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:47,305 INFO L225 Difference]: With dead ends: 2447 [2021-07-13 19:11:47,305 INFO L226 Difference]: Without dead ends: 2447 [2021-07-13 19:11:47,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-07-13 19:11:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1914. [2021-07-13 19:11:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.6905384213277577) internal successors, (5147), 1913 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:47,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5147 transitions. [2021-07-13 19:11:47,330 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5147 transitions. Word has length 26 [2021-07-13 19:11:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:47,330 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 5147 transitions. [2021-07-13 19:11:47,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5147 transitions. [2021-07-13 19:11:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:47,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:47,333 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:47,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:11:47,534 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:47,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:47,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1127702055, now seen corresponding path program 21 times [2021-07-13 19:11:47,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:47,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597578604] [2021-07-13 19:11:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:47,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:47,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597578604] [2021-07-13 19:11:47,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597578604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:47,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074733099] [2021-07-13 19:11:47,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:47,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:11:47,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:47,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074733099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:47,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:47,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:11:47,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633041142] [2021-07-13 19:11:47,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:47,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:47,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:47,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:47,612 INFO L87 Difference]: Start difference. First operand 1914 states and 5147 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:47,682 INFO L93 Difference]: Finished difference Result 2092 states and 5497 transitions. [2021-07-13 19:11:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:11:47,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:47,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:47,686 INFO L225 Difference]: With dead ends: 2092 [2021-07-13 19:11:47,686 INFO L226 Difference]: Without dead ends: 2089 [2021-07-13 19:11:47,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-07-13 19:11:47,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1899. [2021-07-13 19:11:47,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.684931506849315) internal successors, (5096), 1898 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5096 transitions. [2021-07-13 19:11:47,709 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5096 transitions. Word has length 26 [2021-07-13 19:11:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:47,710 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5096 transitions. [2021-07-13 19:11:47,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5096 transitions. [2021-07-13 19:11:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:47,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:47,712 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:47,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:47,925 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:47,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1111998297, now seen corresponding path program 22 times [2021-07-13 19:11:47,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:47,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791797435] [2021-07-13 19:11:47,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:47,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:47,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791797435] [2021-07-13 19:11:47,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791797435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:47,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126250151] [2021-07-13 19:11:47,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:47,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:47,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:47,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:48,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126250151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:48,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:48,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:11:48,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448324925] [2021-07-13 19:11:48,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:48,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:48,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:48,018 INFO L87 Difference]: Start difference. First operand 1899 states and 5096 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:48,102 INFO L93 Difference]: Finished difference Result 2552 states and 6599 transitions. [2021-07-13 19:11:48,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:48,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:48,106 INFO L225 Difference]: With dead ends: 2552 [2021-07-13 19:11:48,106 INFO L226 Difference]: Without dead ends: 2552 [2021-07-13 19:11:48,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:48,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-07-13 19:11:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2092. [2021-07-13 19:11:48,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.713534194165471) internal successors, (5674), 2091 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5674 transitions. [2021-07-13 19:11:48,133 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5674 transitions. Word has length 26 [2021-07-13 19:11:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:48,133 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 5674 transitions. [2021-07-13 19:11:48,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5674 transitions. [2021-07-13 19:11:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:48,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:48,136 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:48,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:11:48,353 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:48,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1689374502, now seen corresponding path program 23 times [2021-07-13 19:11:48,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:48,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824092188] [2021-07-13 19:11:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:48,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:48,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824092188] [2021-07-13 19:11:48,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824092188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:48,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291345706] [2021-07-13 19:11:48,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:48,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:11:48,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:48,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:48,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:48,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:48,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291345706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:48,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:48,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-07-13 19:11:48,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622446476] [2021-07-13 19:11:48,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:48,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:48,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:48,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:48,489 INFO L87 Difference]: Start difference. First operand 2092 states and 5674 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:48,593 INFO L93 Difference]: Finished difference Result 3728 states and 10027 transitions. [2021-07-13 19:11:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:48,599 INFO L225 Difference]: With dead ends: 3728 [2021-07-13 19:11:48,599 INFO L226 Difference]: Without dead ends: 3712 [2021-07-13 19:11:48,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-07-13 19:11:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3201. [2021-07-13 19:11:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.8134375) internal successors, (9003), 3200 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 9003 transitions. [2021-07-13 19:11:48,644 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 9003 transitions. Word has length 26 [2021-07-13 19:11:48,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:48,644 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 9003 transitions. [2021-07-13 19:11:48,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:48,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 9003 transitions. [2021-07-13 19:11:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:48,647 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:48,648 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:48,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-13 19:11:48,863 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:48,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:48,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1983712384, now seen corresponding path program 24 times [2021-07-13 19:11:48,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:48,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490274604] [2021-07-13 19:11:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:48,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:11:48,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:48,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490274604] [2021-07-13 19:11:48,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490274604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:48,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156073449] [2021-07-13 19:11:48,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:48,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:11:48,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:48,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:48,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156073449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:48,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:48,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-07-13 19:11:48,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819222186] [2021-07-13 19:11:48,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:48,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:48,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:48,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:48,957 INFO L87 Difference]: Start difference. First operand 3201 states and 9003 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:49,072 INFO L93 Difference]: Finished difference Result 3830 states and 10240 transitions. [2021-07-13 19:11:49,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:11:49,072 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:49,077 INFO L225 Difference]: With dead ends: 3830 [2021-07-13 19:11:49,077 INFO L226 Difference]: Without dead ends: 3830 [2021-07-13 19:11:49,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:11:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-07-13 19:11:49,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3216. [2021-07-13 19:11:49,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 2.805909797822706) internal successors, (9021), 3215 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 9021 transitions. [2021-07-13 19:11:49,172 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 9021 transitions. Word has length 26 [2021-07-13 19:11:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:49,172 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 9021 transitions. [2021-07-13 19:11:49,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 9021 transitions. [2021-07-13 19:11:49,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:49,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:49,176 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:49,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:49,391 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:49,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:49,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1051895937, now seen corresponding path program 25 times [2021-07-13 19:11:49,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:49,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380315330] [2021-07-13 19:11:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:11:49,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:49,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380315330] [2021-07-13 19:11:49,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380315330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:49,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287085861] [2021-07-13 19:11:49,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:49,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:49,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:11:49,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287085861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:49,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:49,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:11:49,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833168468] [2021-07-13 19:11:49,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:49,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:49,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:49,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:49,493 INFO L87 Difference]: Start difference. First operand 3216 states and 9021 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:49,580 INFO L93 Difference]: Finished difference Result 3629 states and 9839 transitions. [2021-07-13 19:11:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:11:49,581 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:49,588 INFO L225 Difference]: With dead ends: 3629 [2021-07-13 19:11:49,588 INFO L226 Difference]: Without dead ends: 3617 [2021-07-13 19:11:49,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-07-13 19:11:49,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3079. [2021-07-13 19:11:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.7979207277452893) internal successors, (8612), 3078 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:49,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8612 transitions. [2021-07-13 19:11:49,633 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8612 transitions. Word has length 26 [2021-07-13 19:11:49,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:49,633 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8612 transitions. [2021-07-13 19:11:49,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:49,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8612 transitions. [2021-07-13 19:11:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:49,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:49,635 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:49,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 19:11:49,845 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:49,845 INFO L82 PathProgramCache]: Analyzing trace with hash 346139928, now seen corresponding path program 26 times [2021-07-13 19:11:49,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:49,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688036241] [2021-07-13 19:11:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:49,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:49,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688036241] [2021-07-13 19:11:49,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688036241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:49,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208572053] [2021-07-13 19:11:49,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:49,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:49,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:49,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:49,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:49,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:49,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208572053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:49,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:49,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-13 19:11:49,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914510680] [2021-07-13 19:11:49,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:49,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:49,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:49,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:49,945 INFO L87 Difference]: Start difference. First operand 3079 states and 8612 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:50,079 INFO L93 Difference]: Finished difference Result 4208 states and 11364 transitions. [2021-07-13 19:11:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:11:50,079 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:50,085 INFO L225 Difference]: With dead ends: 4208 [2021-07-13 19:11:50,086 INFO L226 Difference]: Without dead ends: 4208 [2021-07-13 19:11:50,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-07-13 19:11:50,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3506. [2021-07-13 19:11:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.8185449358059915) internal successors, (9879), 3505 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 9879 transitions. [2021-07-13 19:11:50,138 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 9879 transitions. Word has length 26 [2021-07-13 19:11:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:50,138 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 9879 transitions. [2021-07-13 19:11:50,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 9879 transitions. [2021-07-13 19:11:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:50,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:50,142 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:50,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:50,353 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1258958503, now seen corresponding path program 27 times [2021-07-13 19:11:50,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:50,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805206992] [2021-07-13 19:11:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:50,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:50,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805206992] [2021-07-13 19:11:50,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805206992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:50,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788728228] [2021-07-13 19:11:50,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:50,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:11:50,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:50,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:50,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:50,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:50,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788728228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:50,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:50,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:11:50,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472237130] [2021-07-13 19:11:50,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:50,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:50,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:50,468 INFO L87 Difference]: Start difference. First operand 3506 states and 9879 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:50,561 INFO L93 Difference]: Finished difference Result 3876 states and 10634 transitions. [2021-07-13 19:11:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:50,561 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:50,567 INFO L225 Difference]: With dead ends: 3876 [2021-07-13 19:11:50,567 INFO L226 Difference]: Without dead ends: 3864 [2021-07-13 19:11:50,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:50,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-07-13 19:11:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3527. [2021-07-13 19:11:50,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.811401020986954) internal successors, (9913), 3526 states have internal predecessors, (9913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9913 transitions. [2021-07-13 19:11:50,618 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9913 transitions. Word has length 26 [2021-07-13 19:11:50,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:50,618 INFO L482 AbstractCegarLoop]: Abstraction has 3527 states and 9913 transitions. [2021-07-13 19:11:50,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:50,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9913 transitions. [2021-07-13 19:11:50,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:50,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:50,621 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:50,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 19:11:50,822 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:50,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:50,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1264613717, now seen corresponding path program 28 times [2021-07-13 19:11:50,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:50,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583525609] [2021-07-13 19:11:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:50,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:50,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583525609] [2021-07-13 19:11:50,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583525609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:50,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558269630] [2021-07-13 19:11:50,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:50,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:50,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:50,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:11:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:50,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558269630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:50,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:50,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:11:50,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333285636] [2021-07-13 19:11:50,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:50,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:50,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:50,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:50,949 INFO L87 Difference]: Start difference. First operand 3527 states and 9913 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:51,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:51,103 INFO L93 Difference]: Finished difference Result 4288 states and 11605 transitions. [2021-07-13 19:11:51,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:11:51,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:51,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:51,110 INFO L225 Difference]: With dead ends: 4288 [2021-07-13 19:11:51,110 INFO L226 Difference]: Without dead ends: 4288 [2021-07-13 19:11:51,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:51,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2021-07-13 19:11:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3636. [2021-07-13 19:11:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.817881705639615) internal successors, (10243), 3635 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 10243 transitions. [2021-07-13 19:11:51,158 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 10243 transitions. Word has length 26 [2021-07-13 19:11:51,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:51,158 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 10243 transitions. [2021-07-13 19:11:51,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:51,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 10243 transitions. [2021-07-13 19:11:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:51,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:51,161 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:51,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:11:51,361 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash -535116392, now seen corresponding path program 29 times [2021-07-13 19:11:51,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:51,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768781916] [2021-07-13 19:11:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:51,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:51,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768781916] [2021-07-13 19:11:51,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768781916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:51,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573078590] [2021-07-13 19:11:51,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:51,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:11:51,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:51,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:51,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:51,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573078590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:51,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:51,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-07-13 19:11:51,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079388082] [2021-07-13 19:11:51,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:51,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:51,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:51,480 INFO L87 Difference]: Start difference. First operand 3636 states and 10243 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:51,603 INFO L93 Difference]: Finished difference Result 4890 states and 13623 transitions. [2021-07-13 19:11:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:51,603 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:51,610 INFO L225 Difference]: With dead ends: 4890 [2021-07-13 19:11:51,610 INFO L226 Difference]: Without dead ends: 4858 [2021-07-13 19:11:51,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-07-13 19:11:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4449. [2021-07-13 19:11:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 2.8424010791366907) internal successors, (12643), 4448 states have internal predecessors, (12643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 12643 transitions. [2021-07-13 19:11:51,667 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 12643 transitions. Word has length 26 [2021-07-13 19:11:51,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:51,667 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 12643 transitions. [2021-07-13 19:11:51,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 12643 transitions. [2021-07-13 19:11:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:51,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:51,670 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:51,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:51,870 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2036715645, now seen corresponding path program 30 times [2021-07-13 19:11:51,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:51,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672302583] [2021-07-13 19:11:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:51,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:51,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:51,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672302583] [2021-07-13 19:11:51,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672302583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:51,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306477408] [2021-07-13 19:11:51,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:51,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:11:51,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:51,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:51,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:51,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306477408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:51,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:51,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:11:51,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174441336] [2021-07-13 19:11:51,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:51,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:51,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:51,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:51,972 INFO L87 Difference]: Start difference. First operand 4449 states and 12643 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:52,059 INFO L93 Difference]: Finished difference Result 5697 states and 15817 transitions. [2021-07-13 19:11:52,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:52,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:52,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:52,067 INFO L225 Difference]: With dead ends: 5697 [2021-07-13 19:11:52,068 INFO L226 Difference]: Without dead ends: 5697 [2021-07-13 19:11:52,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:52,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-07-13 19:11:52,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5030. [2021-07-13 19:11:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 2.8657784847882284) internal successors, (14412), 5029 states have internal predecessors, (14412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 14412 transitions. [2021-07-13 19:11:52,153 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 14412 transitions. Word has length 26 [2021-07-13 19:11:52,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:52,153 INFO L482 AbstractCegarLoop]: Abstraction has 5030 states and 14412 transitions. [2021-07-13 19:11:52,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 14412 transitions. [2021-07-13 19:11:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:52,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:52,156 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:52,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:52,356 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1680875446, now seen corresponding path program 31 times [2021-07-13 19:11:52,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:52,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036860614] [2021-07-13 19:11:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:52,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:52,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036860614] [2021-07-13 19:11:52,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036860614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:52,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806149490] [2021-07-13 19:11:52,397 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:52,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:52,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:52,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806149490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:52,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:52,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-13 19:11:52,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274257078] [2021-07-13 19:11:52,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:52,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:52,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:52,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:52,460 INFO L87 Difference]: Start difference. First operand 5030 states and 14412 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:52,573 INFO L93 Difference]: Finished difference Result 6176 states and 17476 transitions. [2021-07-13 19:11:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:52,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:52,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:52,583 INFO L225 Difference]: With dead ends: 6176 [2021-07-13 19:11:52,583 INFO L226 Difference]: Without dead ends: 6160 [2021-07-13 19:11:52,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-07-13 19:11:52,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5779. [2021-07-13 19:11:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5778 states have (on average 2.8816199376947043) internal successors, (16650), 5778 states have internal predecessors, (16650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 16650 transitions. [2021-07-13 19:11:52,663 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 16650 transitions. Word has length 26 [2021-07-13 19:11:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:52,663 INFO L482 AbstractCegarLoop]: Abstraction has 5779 states and 16650 transitions. [2021-07-13 19:11:52,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 16650 transitions. [2021-07-13 19:11:52,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:52,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:52,667 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:52,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:52,884 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:52,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:52,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1058995036, now seen corresponding path program 32 times [2021-07-13 19:11:52,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:52,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145637401] [2021-07-13 19:11:52,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:52,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:52,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145637401] [2021-07-13 19:11:52,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145637401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:52,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962862086] [2021-07-13 19:11:52,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:52,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:52,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:52,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962862086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:52,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:52,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-13 19:11:52,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239757109] [2021-07-13 19:11:52,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:52,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:52,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:52,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:52,979 INFO L87 Difference]: Start difference. First operand 5779 states and 16650 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:53,086 INFO L93 Difference]: Finished difference Result 6311 states and 17791 transitions. [2021-07-13 19:11:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:53,116 INFO L225 Difference]: With dead ends: 6311 [2021-07-13 19:11:53,116 INFO L226 Difference]: Without dead ends: 6311 [2021-07-13 19:11:53,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-07-13 19:11:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5796. [2021-07-13 19:11:53,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 2.8807592752372737) internal successors, (16694), 5795 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 16694 transitions. [2021-07-13 19:11:53,199 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 16694 transitions. Word has length 26 [2021-07-13 19:11:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:53,199 INFO L482 AbstractCegarLoop]: Abstraction has 5796 states and 16694 transitions. [2021-07-13 19:11:53,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 16694 transitions. [2021-07-13 19:11:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:53,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:53,203 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:53,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 19:11:53,404 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:53,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:53,404 INFO L82 PathProgramCache]: Analyzing trace with hash 127178589, now seen corresponding path program 33 times [2021-07-13 19:11:53,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:53,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330355170] [2021-07-13 19:11:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:53,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:53,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:53,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330355170] [2021-07-13 19:11:53,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330355170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:53,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973068804] [2021-07-13 19:11:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:11:53,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:11:53,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:53,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:53,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973068804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:53,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:53,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:11:53,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406989274] [2021-07-13 19:11:53,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:53,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:53,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:53,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:53,501 INFO L87 Difference]: Start difference. First operand 5796 states and 16694 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:53,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:53,566 INFO L93 Difference]: Finished difference Result 6492 states and 18169 transitions. [2021-07-13 19:11:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:11:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:53,575 INFO L225 Difference]: With dead ends: 6492 [2021-07-13 19:11:53,576 INFO L226 Difference]: Without dead ends: 6489 [2021-07-13 19:11:53,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-07-13 19:11:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5795. [2021-07-13 19:11:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 2.8795305488436314) internal successors, (16684), 5794 states have internal predecessors, (16684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 16684 transitions. [2021-07-13 19:11:53,666 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 16684 transitions. Word has length 26 [2021-07-13 19:11:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:53,666 INFO L482 AbstractCegarLoop]: Abstraction has 5795 states and 16684 transitions. [2021-07-13 19:11:53,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 16684 transitions. [2021-07-13 19:11:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:53,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:53,670 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:53,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:53,885 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash -578577420, now seen corresponding path program 34 times [2021-07-13 19:11:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:53,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052035936] [2021-07-13 19:11:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:53,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052035936] [2021-07-13 19:11:53,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052035936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741769679] [2021-07-13 19:11:53,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:53,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:53,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:53,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:53,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741769679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:53,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:53,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-13 19:11:53,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669633472] [2021-07-13 19:11:53,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:53,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:53,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:53,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:53,987 INFO L87 Difference]: Start difference. First operand 5795 states and 16684 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:54,144 INFO L93 Difference]: Finished difference Result 6497 states and 18243 transitions. [2021-07-13 19:11:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:11:54,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:54,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:54,153 INFO L225 Difference]: With dead ends: 6497 [2021-07-13 19:11:54,153 INFO L226 Difference]: Without dead ends: 6497 [2021-07-13 19:11:54,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:54,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2021-07-13 19:11:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 5692. [2021-07-13 19:11:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 2.870848708487085) internal successors, (16338), 5691 states have internal predecessors, (16338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:54,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 16338 transitions. [2021-07-13 19:11:54,222 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 16338 transitions. Word has length 26 [2021-07-13 19:11:54,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:54,222 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 16338 transitions. [2021-07-13 19:11:54,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 16338 transitions. [2021-07-13 19:11:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:54,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:54,226 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:54,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:54,426 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:54,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:54,426 INFO L82 PathProgramCache]: Analyzing trace with hash 334241155, now seen corresponding path program 35 times [2021-07-13 19:11:54,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:54,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799322521] [2021-07-13 19:11:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:54,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:54,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799322521] [2021-07-13 19:11:54,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799322521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:54,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034123182] [2021-07-13 19:11:54,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:54,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:11:54,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:54,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:54,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:54,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034123182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:54,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:54,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-07-13 19:11:54,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091810683] [2021-07-13 19:11:54,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:54,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:54,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:54,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:54,529 INFO L87 Difference]: Start difference. First operand 5692 states and 16338 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:54,639 INFO L93 Difference]: Finished difference Result 8010 states and 22671 transitions. [2021-07-13 19:11:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:54,652 INFO L225 Difference]: With dead ends: 8010 [2021-07-13 19:11:54,652 INFO L226 Difference]: Without dead ends: 7995 [2021-07-13 19:11:54,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:11:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-07-13 19:11:54,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7490. [2021-07-13 19:11:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 7489 states have (on average 2.8919748965148884) internal successors, (21658), 7489 states have internal predecessors, (21658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:54,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 21658 transitions. [2021-07-13 19:11:54,782 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 21658 transitions. Word has length 26 [2021-07-13 19:11:54,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:54,782 INFO L482 AbstractCegarLoop]: Abstraction has 7490 states and 21658 transitions. [2021-07-13 19:11:54,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:54,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 21658 transitions. [2021-07-13 19:11:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:54,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:54,787 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:54,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-07-13 19:11:54,987 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:54,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:54,987 INFO L82 PathProgramCache]: Analyzing trace with hash -232684456, now seen corresponding path program 36 times [2021-07-13 19:11:54,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:54,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540961765] [2021-07-13 19:11:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:55,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:55,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:55,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540961765] [2021-07-13 19:11:55,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540961765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:55,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284900002] [2021-07-13 19:11:55,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:55,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:11:55,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:55,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:55,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:55,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284900002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:55,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:55,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 19:11:55,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433480522] [2021-07-13 19:11:55,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:11:55,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:11:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:55,155 INFO L87 Difference]: Start difference. First operand 7490 states and 21658 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:55,428 INFO L93 Difference]: Finished difference Result 8305 states and 23489 transitions. [2021-07-13 19:11:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:11:55,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:55,445 INFO L225 Difference]: With dead ends: 8305 [2021-07-13 19:11:55,445 INFO L226 Difference]: Without dead ends: 8305 [2021-07-13 19:11:55,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:11:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8305 states. [2021-07-13 19:11:55,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8305 to 5349. [2021-07-13 19:11:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 5348 states have (on average 2.863874345549738) internal successors, (15316), 5348 states have internal predecessors, (15316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 15316 transitions. [2021-07-13 19:11:55,547 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 15316 transitions. Word has length 26 [2021-07-13 19:11:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:55,547 INFO L482 AbstractCegarLoop]: Abstraction has 5349 states and 15316 transitions. [2021-07-13 19:11:55,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 15316 transitions. [2021-07-13 19:11:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:11:55,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:55,554 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:55,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:55,769 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181405, now seen corresponding path program 37 times [2021-07-13 19:11:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:55,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012331261] [2021-07-13 19:11:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:55,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:55,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012331261] [2021-07-13 19:11:55,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012331261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:55,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459288120] [2021-07-13 19:11:55,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:55,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:11:55,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:55,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459288120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:55,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:55,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:11:55,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860426964] [2021-07-13 19:11:55,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:55,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:55,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:55,870 INFO L87 Difference]: Start difference. First operand 5349 states and 15316 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:55,964 INFO L93 Difference]: Finished difference Result 5938 states and 16533 transitions. [2021-07-13 19:11:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:55,964 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:11:55,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:55,973 INFO L225 Difference]: With dead ends: 5938 [2021-07-13 19:11:55,973 INFO L226 Difference]: Without dead ends: 5915 [2021-07-13 19:11:55,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:11:55,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-07-13 19:11:56,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5382. [2021-07-13 19:11:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5382 states, 5381 states have (on average 2.858018955584464) internal successors, (15379), 5381 states have internal predecessors, (15379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 15379 transitions. [2021-07-13 19:11:56,069 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 15379 transitions. Word has length 26 [2021-07-13 19:11:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:56,069 INFO L482 AbstractCegarLoop]: Abstraction has 5382 states and 15379 transitions. [2021-07-13 19:11:56,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 15379 transitions. [2021-07-13 19:11:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:11:56,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:56,074 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:56,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-13 19:11:56,290 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:56,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:56,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1692037720, now seen corresponding path program 5 times [2021-07-13 19:11:56,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:56,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034796042] [2021-07-13 19:11:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:56,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:56,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034796042] [2021-07-13 19:11:56,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034796042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:56,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791750954] [2021-07-13 19:11:56,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:56,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:11:56,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:56,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:56,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:56,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791750954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:56,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:56,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:11:56,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471377728] [2021-07-13 19:11:56,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:56,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:56,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:56,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:56,420 INFO L87 Difference]: Start difference. First operand 5382 states and 15379 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:56,609 INFO L93 Difference]: Finished difference Result 5894 states and 16303 transitions. [2021-07-13 19:11:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:11:56,610 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:11:56,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:56,618 INFO L225 Difference]: With dead ends: 5894 [2021-07-13 19:11:56,619 INFO L226 Difference]: Without dead ends: 5890 [2021-07-13 19:11:56,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:11:56,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2021-07-13 19:11:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 5478. [2021-07-13 19:11:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 2.823808654372832) internal successors, (15466), 5477 states have internal predecessors, (15466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 15466 transitions. [2021-07-13 19:11:56,688 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 15466 transitions. Word has length 29 [2021-07-13 19:11:56,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:56,688 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 15466 transitions. [2021-07-13 19:11:56,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 15466 transitions. [2021-07-13 19:11:56,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:11:56,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:56,692 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:56,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:56,893 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2081641864, now seen corresponding path program 38 times [2021-07-13 19:11:56,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:56,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215224585] [2021-07-13 19:11:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:56,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:56,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215224585] [2021-07-13 19:11:56,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215224585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:56,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583821661] [2021-07-13 19:11:56,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:56,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:56,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:56,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:11:56,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:56,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583821661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:56,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:56,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:11:56,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572587867] [2021-07-13 19:11:56,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:56,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:56,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:56,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:56,986 INFO L87 Difference]: Start difference. First operand 5478 states and 15466 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:57,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:57,110 INFO L93 Difference]: Finished difference Result 6571 states and 18236 transitions. [2021-07-13 19:11:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:11:57,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:11:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:57,120 INFO L225 Difference]: With dead ends: 6571 [2021-07-13 19:11:57,120 INFO L226 Difference]: Without dead ends: 6564 [2021-07-13 19:11:57,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:57,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2021-07-13 19:11:57,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 6354. [2021-07-13 19:11:57,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6354 states, 6353 states have (on average 2.808279552967102) internal successors, (17841), 6353 states have internal predecessors, (17841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:57,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 17841 transitions. [2021-07-13 19:11:57,247 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 17841 transitions. Word has length 29 [2021-07-13 19:11:57,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:57,247 INFO L482 AbstractCegarLoop]: Abstraction has 6354 states and 17841 transitions. [2021-07-13 19:11:57,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:57,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 17841 transitions. [2021-07-13 19:11:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:11:57,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:57,252 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:57,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:57,456 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:57,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:57,457 INFO L82 PathProgramCache]: Analyzing trace with hash -159779870, now seen corresponding path program 39 times [2021-07-13 19:11:57,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:57,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303978117] [2021-07-13 19:11:57,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:57,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:11:57,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:57,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303978117] [2021-07-13 19:11:57,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303978117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:57,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552450385] [2021-07-13 19:11:57,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:57,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:11:57,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:57,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-13 19:11:57,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552450385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:57,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:57,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-07-13 19:11:57,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463432242] [2021-07-13 19:11:57,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:11:57,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:57,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:11:57,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:57,665 INFO L87 Difference]: Start difference. First operand 6354 states and 17841 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:58,445 INFO L93 Difference]: Finished difference Result 14438 states and 39075 transitions. [2021-07-13 19:11:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:11:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:11:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:58,471 INFO L225 Difference]: With dead ends: 14438 [2021-07-13 19:11:58,471 INFO L226 Difference]: Without dead ends: 14355 [2021-07-13 19:11:58,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:11:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-07-13 19:11:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8796. [2021-07-13 19:11:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 8795 states have (on average 2.8627629334849347) internal successors, (25178), 8795 states have internal predecessors, (25178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:58,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 25178 transitions. [2021-07-13 19:11:58,656 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 25178 transitions. Word has length 29 [2021-07-13 19:11:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:58,656 INFO L482 AbstractCegarLoop]: Abstraction has 8796 states and 25178 transitions. [2021-07-13 19:11:58,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 25178 transitions. [2021-07-13 19:11:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:11:58,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:58,663 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:58,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:58,863 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash 328852904, now seen corresponding path program 6 times [2021-07-13 19:11:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:58,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488932683] [2021-07-13 19:11:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:58,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:58,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488932683] [2021-07-13 19:11:58,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488932683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:58,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816063159] [2021-07-13 19:11:58,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:58,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:11:58,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:58,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:11:58,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:59,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:11:59,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:11:59,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:59,063 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-07-13 19:11:59,063 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:11:59,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:59,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-07-13 19:11:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:59,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816063159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:59,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:59,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:11:59,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308830379] [2021-07-13 19:11:59,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:11:59,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:59,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:11:59,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:11:59,070 INFO L87 Difference]: Start difference. First operand 8796 states and 25178 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:59,299 INFO L93 Difference]: Finished difference Result 6002 states and 16256 transitions. [2021-07-13 19:11:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:59,299 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:11:59,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:59,307 INFO L225 Difference]: With dead ends: 6002 [2021-07-13 19:11:59,307 INFO L226 Difference]: Without dead ends: 5857 [2021-07-13 19:11:59,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:11:59,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2021-07-13 19:11:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 3330. [2021-07-13 19:11:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 2.7981375788525082) internal successors, (9315), 3329 states have internal predecessors, (9315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 9315 transitions. [2021-07-13 19:11:59,381 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 9315 transitions. Word has length 29 [2021-07-13 19:11:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:59,381 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 9315 transitions. [2021-07-13 19:11:59,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 9315 transitions. [2021-07-13 19:11:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:11:59,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:59,383 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:59,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:59,591 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:59,592 INFO L82 PathProgramCache]: Analyzing trace with hash -114875864, now seen corresponding path program 7 times [2021-07-13 19:11:59,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:59,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474446245] [2021-07-13 19:11:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:59,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:59,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474446245] [2021-07-13 19:11:59,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474446245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:59,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413248739] [2021-07-13 19:11:59,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:59,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413248739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:59,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:59,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:11:59,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592134459] [2021-07-13 19:11:59,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:59,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:59,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:59,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:59,702 INFO L87 Difference]: Start difference. First operand 3330 states and 9315 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:59,777 INFO L93 Difference]: Finished difference Result 3434 states and 9538 transitions. [2021-07-13 19:11:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:59,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:11:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:59,781 INFO L225 Difference]: With dead ends: 3434 [2021-07-13 19:11:59,781 INFO L226 Difference]: Without dead ends: 3434 [2021-07-13 19:11:59,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:59,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-07-13 19:11:59,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3356. [2021-07-13 19:11:59,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 2.794634873323398) internal successors, (9376), 3355 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 9376 transitions. [2021-07-13 19:11:59,817 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 9376 transitions. Word has length 29 [2021-07-13 19:11:59,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:59,817 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 9376 transitions. [2021-07-13 19:11:59,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 9376 transitions. [2021-07-13 19:11:59,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:11:59,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:59,820 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:00,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 19:12:00,021 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:00,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1336556998, now seen corresponding path program 6 times [2021-07-13 19:12:00,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:00,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145879929] [2021-07-13 19:12:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:00,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:00,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145879929] [2021-07-13 19:12:00,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145879929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:00,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098060964] [2021-07-13 19:12:00,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:00,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:12:00,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:00,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:00,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098060964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:00,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:00,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:12:00,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347319623] [2021-07-13 19:12:00,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:12:00,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:00,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:12:00,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:00,131 INFO L87 Difference]: Start difference. First operand 3356 states and 9376 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:00,242 INFO L93 Difference]: Finished difference Result 3792 states and 10255 transitions. [2021-07-13 19:12:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:00,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:00,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:00,247 INFO L225 Difference]: With dead ends: 3792 [2021-07-13 19:12:00,247 INFO L226 Difference]: Without dead ends: 3777 [2021-07-13 19:12:00,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-07-13 19:12:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3443. [2021-07-13 19:12:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.779779198140616) internal successors, (9568), 3442 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 9568 transitions. [2021-07-13 19:12:00,286 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 9568 transitions. Word has length 29 [2021-07-13 19:12:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:00,286 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 9568 transitions. [2021-07-13 19:12:00,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 9568 transitions. [2021-07-13 19:12:00,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:00,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:00,288 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:00,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 19:12:00,489 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1458077306, now seen corresponding path program 8 times [2021-07-13 19:12:00,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:00,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903055060] [2021-07-13 19:12:00,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:00,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:00,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903055060] [2021-07-13 19:12:00,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903055060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:00,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298642817] [2021-07-13 19:12:00,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:00,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:00,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:00,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:00,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298642817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:00,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:00,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:12:00,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590822736] [2021-07-13 19:12:00,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:12:00,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:00,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:12:00,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:00,615 INFO L87 Difference]: Start difference. First operand 3443 states and 9568 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:00,797 INFO L93 Difference]: Finished difference Result 3707 states and 10003 transitions. [2021-07-13 19:12:00,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:00,797 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:00,802 INFO L225 Difference]: With dead ends: 3707 [2021-07-13 19:12:00,802 INFO L226 Difference]: Without dead ends: 3623 [2021-07-13 19:12:00,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:00,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-07-13 19:12:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3361. [2021-07-13 19:12:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 2.7607142857142857) internal successors, (9276), 3360 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 9276 transitions. [2021-07-13 19:12:00,851 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 9276 transitions. Word has length 29 [2021-07-13 19:12:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:00,851 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 9276 transitions. [2021-07-13 19:12:00,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 9276 transitions. [2021-07-13 19:12:00,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:00,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:00,853 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:01,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 19:12:01,054 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:01,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:01,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2071613486, now seen corresponding path program 9 times [2021-07-13 19:12:01,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:01,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36190136] [2021-07-13 19:12:01,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:01,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36190136] [2021-07-13 19:12:01,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36190136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:01,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290596755] [2021-07-13 19:12:01,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:01,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:12:01,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:01,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:01,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290596755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:01,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:01,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:12:01,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368347584] [2021-07-13 19:12:01,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:12:01,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:01,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:12:01,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:01,169 INFO L87 Difference]: Start difference. First operand 3361 states and 9276 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:01,269 INFO L93 Difference]: Finished difference Result 3919 states and 10560 transitions. [2021-07-13 19:12:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:01,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:01,275 INFO L225 Difference]: With dead ends: 3919 [2021-07-13 19:12:01,275 INFO L226 Difference]: Without dead ends: 3907 [2021-07-13 19:12:01,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:01,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-07-13 19:12:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3641. [2021-07-13 19:12:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 2.745879120879121) internal successors, (9995), 3640 states have internal predecessors, (9995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 9995 transitions. [2021-07-13 19:12:01,334 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 9995 transitions. Word has length 29 [2021-07-13 19:12:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:01,335 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 9995 transitions. [2021-07-13 19:12:01,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 9995 transitions. [2021-07-13 19:12:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:01,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:01,338 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:01,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:12:01,555 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:01,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1048811592, now seen corresponding path program 40 times [2021-07-13 19:12:01,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:01,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404949999] [2021-07-13 19:12:01,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:12:01,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:01,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404949999] [2021-07-13 19:12:01,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404949999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:01,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749235612] [2021-07-13 19:12:01,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:01,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:01,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:01,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:12:01,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:12:01,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749235612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:01,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:01,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:12:01,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951693968] [2021-07-13 19:12:01,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:12:01,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:12:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:12:01,645 INFO L87 Difference]: Start difference. First operand 3641 states and 9995 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:01,736 INFO L93 Difference]: Finished difference Result 4879 states and 13397 transitions. [2021-07-13 19:12:01,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:12:01,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:01,743 INFO L225 Difference]: With dead ends: 4879 [2021-07-13 19:12:01,743 INFO L226 Difference]: Without dead ends: 4866 [2021-07-13 19:12:01,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:12:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-07-13 19:12:01,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4554. [2021-07-13 19:12:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4553 states have (on average 2.7981550625960905) internal successors, (12740), 4553 states have internal predecessors, (12740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 12740 transitions. [2021-07-13 19:12:01,799 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 12740 transitions. Word has length 29 [2021-07-13 19:12:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:01,799 INFO L482 AbstractCegarLoop]: Abstraction has 4554 states and 12740 transitions. [2021-07-13 19:12:01,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 12740 transitions. [2021-07-13 19:12:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:01,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:01,802 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:02,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 19:12:02,003 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 70303848, now seen corresponding path program 10 times [2021-07-13 19:12:02,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:02,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863097766] [2021-07-13 19:12:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:02,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:02,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863097766] [2021-07-13 19:12:02,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863097766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:02,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673040631] [2021-07-13 19:12:02,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:02,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:02,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:02,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:12:02,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:02,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:12:02,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:12:02,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:12:02,116 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:12:02,116 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:12:02,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:12:02,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:12:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:02,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673040631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:02,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:02,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:12:02,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919030115] [2021-07-13 19:12:02,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:02,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:02,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:02,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:02,123 INFO L87 Difference]: Start difference. First operand 4554 states and 12740 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:02,334 INFO L93 Difference]: Finished difference Result 7716 states and 21017 transitions. [2021-07-13 19:12:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:02,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:02,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:02,345 INFO L225 Difference]: With dead ends: 7716 [2021-07-13 19:12:02,345 INFO L226 Difference]: Without dead ends: 7689 [2021-07-13 19:12:02,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7689 states. [2021-07-13 19:12:02,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7689 to 6612. [2021-07-13 19:12:02,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.8100136136741796) internal successors, (18577), 6611 states have internal predecessors, (18577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 18577 transitions. [2021-07-13 19:12:02,476 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 18577 transitions. Word has length 29 [2021-07-13 19:12:02,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:02,476 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 18577 transitions. [2021-07-13 19:12:02,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 18577 transitions. [2021-07-13 19:12:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:02,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:02,481 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:02,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 19:12:02,681 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1154021054, now seen corresponding path program 7 times [2021-07-13 19:12:02,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:02,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977415932] [2021-07-13 19:12:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:02,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:02,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977415932] [2021-07-13 19:12:02,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977415932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:02,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300338721] [2021-07-13 19:12:02,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:12:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:02,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:12:02,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:12:02,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:12:02,831 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:12:02,831 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:12:02,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:12:02,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:12:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:02,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300338721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:02,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:02,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:12:02,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792653246] [2021-07-13 19:12:02,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:02,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:02,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:02,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:02,837 INFO L87 Difference]: Start difference. First operand 6612 states and 18577 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:03,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:03,090 INFO L93 Difference]: Finished difference Result 7693 states and 20980 transitions. [2021-07-13 19:12:03,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:03,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:03,105 INFO L225 Difference]: With dead ends: 7693 [2021-07-13 19:12:03,105 INFO L226 Difference]: Without dead ends: 7662 [2021-07-13 19:12:03,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-07-13 19:12:03,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6972. [2021-07-13 19:12:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6972 states, 6971 states have (on average 2.7987376273131543) internal successors, (19510), 6971 states have internal predecessors, (19510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 19510 transitions. [2021-07-13 19:12:03,216 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 19510 transitions. Word has length 29 [2021-07-13 19:12:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:03,216 INFO L482 AbstractCegarLoop]: Abstraction has 6972 states and 19510 transitions. [2021-07-13 19:12:03,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 19510 transitions. [2021-07-13 19:12:03,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:03,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:03,220 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:03,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:03,421 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:03,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:03,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1507649858, now seen corresponding path program 11 times [2021-07-13 19:12:03,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:03,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185801401] [2021-07-13 19:12:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:03,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:03,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185801401] [2021-07-13 19:12:03,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185801401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:03,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562200355] [2021-07-13 19:12:03,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:03,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:12:03,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:03,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:03,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:03,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562200355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:03,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:03,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-13 19:12:03,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901828764] [2021-07-13 19:12:03,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:03,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:03,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:03,577 INFO L87 Difference]: Start difference. First operand 6972 states and 19510 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:03,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:03,723 INFO L93 Difference]: Finished difference Result 6857 states and 19119 transitions. [2021-07-13 19:12:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:12:03,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:03,736 INFO L225 Difference]: With dead ends: 6857 [2021-07-13 19:12:03,736 INFO L226 Difference]: Without dead ends: 6823 [2021-07-13 19:12:03,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:03,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2021-07-13 19:12:03,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 6569. [2021-07-13 19:12:03,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 2.82673568818514) internal successors, (18566), 6568 states have internal predecessors, (18566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 18566 transitions. [2021-07-13 19:12:03,856 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 18566 transitions. Word has length 29 [2021-07-13 19:12:03,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:03,856 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 18566 transitions. [2021-07-13 19:12:03,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 18566 transitions. [2021-07-13 19:12:03,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:03,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:03,860 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:04,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 19:12:04,061 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1002279274, now seen corresponding path program 8 times [2021-07-13 19:12:04,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:04,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620892284] [2021-07-13 19:12:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:04,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:04,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620892284] [2021-07-13 19:12:04,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620892284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:04,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142408453] [2021-07-13 19:12:04,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:04,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:04,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:04,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:04,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142408453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:04,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:04,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:12:04,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126563428] [2021-07-13 19:12:04,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:12:04,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:12:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:04,194 INFO L87 Difference]: Start difference. First operand 6569 states and 18566 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:04,315 INFO L93 Difference]: Finished difference Result 6936 states and 19307 transitions. [2021-07-13 19:12:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:04,316 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:04,327 INFO L225 Difference]: With dead ends: 6936 [2021-07-13 19:12:04,327 INFO L226 Difference]: Without dead ends: 6928 [2021-07-13 19:12:04,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6928 states. [2021-07-13 19:12:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 6620. [2021-07-13 19:12:04,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 2.8214231757063) internal successors, (18675), 6619 states have internal predecessors, (18675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 18675 transitions. [2021-07-13 19:12:04,428 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 18675 transitions. Word has length 29 [2021-07-13 19:12:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:04,428 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 18675 transitions. [2021-07-13 19:12:04,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 18675 transitions. [2021-07-13 19:12:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:04,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:04,432 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:04,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:04,632 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:04,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:04,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1792355030, now seen corresponding path program 12 times [2021-07-13 19:12:04,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:04,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922218550] [2021-07-13 19:12:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:04,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:04,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922218550] [2021-07-13 19:12:04,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922218550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:04,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734252500] [2021-07-13 19:12:04,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:04,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:12:04,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:04,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:12:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:04,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:12:04,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:12:04,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:12:04,758 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-07-13 19:12:04,758 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:12:04,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:12:04,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-07-13 19:12:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:04,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734252500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:04,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:04,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-13 19:12:04,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117072871] [2021-07-13 19:12:04,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:12:04,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:04,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:12:04,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:04,765 INFO L87 Difference]: Start difference. First operand 6620 states and 18675 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:04,927 INFO L93 Difference]: Finished difference Result 6433 states and 17744 transitions. [2021-07-13 19:12:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:04,940 INFO L225 Difference]: With dead ends: 6433 [2021-07-13 19:12:04,941 INFO L226 Difference]: Without dead ends: 6334 [2021-07-13 19:12:04,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2021-07-13 19:12:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5949. [2021-07-13 19:12:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 5948 states have (on average 2.8169132481506387) internal successors, (16755), 5948 states have internal predecessors, (16755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 16755 transitions. [2021-07-13 19:12:05,036 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 16755 transitions. Word has length 29 [2021-07-13 19:12:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:05,036 INFO L482 AbstractCegarLoop]: Abstraction has 5949 states and 16755 transitions. [2021-07-13 19:12:05,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:05,037 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 16755 transitions. [2021-07-13 19:12:05,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:05,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:05,040 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:05,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-13 19:12:05,256 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:05,256 INFO L82 PathProgramCache]: Analyzing trace with hash 869370402, now seen corresponding path program 41 times [2021-07-13 19:12:05,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:05,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742492243] [2021-07-13 19:12:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:05,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:05,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742492243] [2021-07-13 19:12:05,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742492243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:05,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090595955] [2021-07-13 19:12:05,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:05,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:12:05,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:05,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:12:05,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:05,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090595955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:05,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:05,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-13 19:12:05,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787182169] [2021-07-13 19:12:05,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:12:05,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:12:05,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:12:05,390 INFO L87 Difference]: Start difference. First operand 5949 states and 16755 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:05,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:05,503 INFO L93 Difference]: Finished difference Result 6991 states and 19595 transitions. [2021-07-13 19:12:05,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:12:05,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:05,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:05,515 INFO L225 Difference]: With dead ends: 6991 [2021-07-13 19:12:05,515 INFO L226 Difference]: Without dead ends: 6978 [2021-07-13 19:12:05,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:12:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6978 states. [2021-07-13 19:12:05,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6978 to 6732. [2021-07-13 19:12:05,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6732 states, 6731 states have (on average 2.834794235626207) internal successors, (19081), 6731 states have internal predecessors, (19081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6732 states to 6732 states and 19081 transitions. [2021-07-13 19:12:05,621 INFO L78 Accepts]: Start accepts. Automaton has 6732 states and 19081 transitions. Word has length 29 [2021-07-13 19:12:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:05,621 INFO L482 AbstractCegarLoop]: Abstraction has 6732 states and 19081 transitions. [2021-07-13 19:12:05,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states and 19081 transitions. [2021-07-13 19:12:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-13 19:12:05,625 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:05,625 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:05,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:05,826 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:05,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:05,826 INFO L82 PathProgramCache]: Analyzing trace with hash -109137342, now seen corresponding path program 13 times [2021-07-13 19:12:05,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:05,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176925137] [2021-07-13 19:12:05,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:05,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:05,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176925137] [2021-07-13 19:12:05,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176925137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:05,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098838159] [2021-07-13 19:12:05,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:05,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:05,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:05,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098838159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:05,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:05,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:05,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033371341] [2021-07-13 19:12:05,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:05,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:05,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:05,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:05,935 INFO L87 Difference]: Start difference. First operand 6732 states and 19081 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:06,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:06,092 INFO L93 Difference]: Finished difference Result 6655 states and 18587 transitions. [2021-07-13 19:12:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:06,092 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-13 19:12:06,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:06,103 INFO L225 Difference]: With dead ends: 6655 [2021-07-13 19:12:06,103 INFO L226 Difference]: Without dead ends: 6601 [2021-07-13 19:12:06,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-07-13 19:12:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 6248. [2021-07-13 19:12:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 2.8304786297422764) internal successors, (17682), 6247 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 17682 transitions. [2021-07-13 19:12:06,191 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 17682 transitions. Word has length 29 [2021-07-13 19:12:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:06,192 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 17682 transitions. [2021-07-13 19:12:06,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 17682 transitions. [2021-07-13 19:12:06,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:06,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:06,196 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:06,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:06,396 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:06,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:06,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1428842088, now seen corresponding path program 42 times [2021-07-13 19:12:06,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:06,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577286902] [2021-07-13 19:12:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:06,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:06,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:06,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577286902] [2021-07-13 19:12:06,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577286902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:06,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235363482] [2021-07-13 19:12:06,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:12:06,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:12:06,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:06,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235363482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:06,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:06,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:12:06,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165105950] [2021-07-13 19:12:06,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:06,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:06,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:06,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:06,518 INFO L87 Difference]: Start difference. First operand 6248 states and 17682 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:06,733 INFO L93 Difference]: Finished difference Result 6779 states and 18724 transitions. [2021-07-13 19:12:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:06,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:06,746 INFO L225 Difference]: With dead ends: 6779 [2021-07-13 19:12:06,746 INFO L226 Difference]: Without dead ends: 6779 [2021-07-13 19:12:06,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-07-13 19:12:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6214. [2021-07-13 19:12:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6213 states have (on average 2.829550941574119) internal successors, (17580), 6213 states have internal predecessors, (17580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 17580 transitions. [2021-07-13 19:12:06,847 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 17580 transitions. Word has length 32 [2021-07-13 19:12:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:06,847 INFO L482 AbstractCegarLoop]: Abstraction has 6214 states and 17580 transitions. [2021-07-13 19:12:06,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 17580 transitions. [2021-07-13 19:12:06,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:06,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:06,852 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:07,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:07,065 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1675261659, now seen corresponding path program 43 times [2021-07-13 19:12:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:07,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685882850] [2021-07-13 19:12:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:07,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:07,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685882850] [2021-07-13 19:12:07,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685882850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:07,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122996200] [2021-07-13 19:12:07,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:07,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:07,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122996200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:07,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:07,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-13 19:12:07,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676980290] [2021-07-13 19:12:07,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:07,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:07,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:07,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:07,227 INFO L87 Difference]: Start difference. First operand 6214 states and 17580 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:07,374 INFO L93 Difference]: Finished difference Result 9059 states and 24818 transitions. [2021-07-13 19:12:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:07,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:07,391 INFO L225 Difference]: With dead ends: 9059 [2021-07-13 19:12:07,391 INFO L226 Difference]: Without dead ends: 9035 [2021-07-13 19:12:07,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2021-07-13 19:12:07,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 7541. [2021-07-13 19:12:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7541 states, 7540 states have (on average 2.8545092838196284) internal successors, (21523), 7540 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 21523 transitions. [2021-07-13 19:12:07,524 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 21523 transitions. Word has length 32 [2021-07-13 19:12:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:07,524 INFO L482 AbstractCegarLoop]: Abstraction has 7541 states and 21523 transitions. [2021-07-13 19:12:07,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 21523 transitions. [2021-07-13 19:12:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:07,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:07,529 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:07,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 19:12:07,730 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1825167733, now seen corresponding path program 44 times [2021-07-13 19:12:07,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:07,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047378642] [2021-07-13 19:12:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:07,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:07,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047378642] [2021-07-13 19:12:07,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047378642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:07,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106896033] [2021-07-13 19:12:07,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:07,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:07,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:07,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:07,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:07,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106896033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:07,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:07,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-13 19:12:07,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240912506] [2021-07-13 19:12:07,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:07,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:07,899 INFO L87 Difference]: Start difference. First operand 7541 states and 21523 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:08,055 INFO L93 Difference]: Finished difference Result 9025 states and 24686 transitions. [2021-07-13 19:12:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:08,055 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:08,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:08,072 INFO L225 Difference]: With dead ends: 9025 [2021-07-13 19:12:08,072 INFO L226 Difference]: Without dead ends: 9025 [2021-07-13 19:12:08,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:08,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2021-07-13 19:12:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 7365. [2021-07-13 19:12:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7365 states, 7364 states have (on average 2.8473655621944594) internal successors, (20968), 7364 states have internal predecessors, (20968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 20968 transitions. [2021-07-13 19:12:08,244 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 20968 transitions. Word has length 32 [2021-07-13 19:12:08,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:08,244 INFO L482 AbstractCegarLoop]: Abstraction has 7365 states and 20968 transitions. [2021-07-13 19:12:08,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 20968 transitions. [2021-07-13 19:12:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:08,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:08,249 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:08,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 19:12:08,450 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:08,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:08,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1537983116, now seen corresponding path program 45 times [2021-07-13 19:12:08,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:08,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671287663] [2021-07-13 19:12:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:08,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:08,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671287663] [2021-07-13 19:12:08,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671287663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:08,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963093388] [2021-07-13 19:12:08,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:08,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:08,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:08,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:08,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 19:12:08,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963093388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:08,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:08,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-13 19:12:08,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088586330] [2021-07-13 19:12:08,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:12:08,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:08,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:12:08,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:08,645 INFO L87 Difference]: Start difference. First operand 7365 states and 20968 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:09,047 INFO L93 Difference]: Finished difference Result 8303 states and 22757 transitions. [2021-07-13 19:12:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:12:09,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:09,061 INFO L225 Difference]: With dead ends: 8303 [2021-07-13 19:12:09,061 INFO L226 Difference]: Without dead ends: 8260 [2021-07-13 19:12:09,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:12:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-07-13 19:12:09,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 7571. [2021-07-13 19:12:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 2.81664464993395) internal successors, (21322), 7570 states have internal predecessors, (21322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 21322 transitions. [2021-07-13 19:12:09,189 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 21322 transitions. Word has length 32 [2021-07-13 19:12:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:09,189 INFO L482 AbstractCegarLoop]: Abstraction has 7571 states and 21322 transitions. [2021-07-13 19:12:09,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 21322 transitions. [2021-07-13 19:12:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:09,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:09,195 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:09,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-13 19:12:09,409 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:09,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:09,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1465178531, now seen corresponding path program 46 times [2021-07-13 19:12:09,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:09,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466774262] [2021-07-13 19:12:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:09,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:09,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466774262] [2021-07-13 19:12:09,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466774262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:09,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791555400] [2021-07-13 19:12:09,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:09,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:09,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:09,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:09,579 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:09,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791555400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:09,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:09,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-07-13 19:12:09,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216938965] [2021-07-13 19:12:09,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:09,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:09,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:09,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:09,580 INFO L87 Difference]: Start difference. First operand 7571 states and 21322 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:09,825 INFO L93 Difference]: Finished difference Result 13088 states and 35868 transitions. [2021-07-13 19:12:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:09,825 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:09,854 INFO L225 Difference]: With dead ends: 13088 [2021-07-13 19:12:09,854 INFO L226 Difference]: Without dead ends: 13088 [2021-07-13 19:12:09,855 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-07-13 19:12:10,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 10587. [2021-07-13 19:12:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.8707727186850556) internal successors, (30390), 10586 states have internal predecessors, (30390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:10,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 30390 transitions. [2021-07-13 19:12:10,077 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 30390 transitions. Word has length 32 [2021-07-13 19:12:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:10,077 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 30390 transitions. [2021-07-13 19:12:10,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 30390 transitions. [2021-07-13 19:12:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:10,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:10,082 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:10,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:10,283 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:10,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:10,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1653853746, now seen corresponding path program 47 times [2021-07-13 19:12:10,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:10,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293213399] [2021-07-13 19:12:10,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:10,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:10,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293213399] [2021-07-13 19:12:10,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293213399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:10,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334408217] [2021-07-13 19:12:10,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:10,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:12:10,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:10,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:10,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:10,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334408217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:10,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:10,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-07-13 19:12:10,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638335160] [2021-07-13 19:12:10,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:10,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:10,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:10,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:10,412 INFO L87 Difference]: Start difference. First operand 10587 states and 30390 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:10,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:10,595 INFO L93 Difference]: Finished difference Result 11705 states and 32668 transitions. [2021-07-13 19:12:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:10,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:10,618 INFO L225 Difference]: With dead ends: 11705 [2021-07-13 19:12:10,618 INFO L226 Difference]: Without dead ends: 11705 [2021-07-13 19:12:10,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11705 states. [2021-07-13 19:12:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11705 to 10573. [2021-07-13 19:12:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 2.8569807037457435) internal successors, (30204), 10572 states have internal predecessors, (30204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:10,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 30204 transitions. [2021-07-13 19:12:10,807 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 30204 transitions. Word has length 32 [2021-07-13 19:12:10,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:10,807 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 30204 transitions. [2021-07-13 19:12:10,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 30204 transitions. [2021-07-13 19:12:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:10,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:10,813 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:11,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 19:12:11,014 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:11,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2101937765, now seen corresponding path program 48 times [2021-07-13 19:12:11,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:11,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866675589] [2021-07-13 19:12:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:11,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866675589] [2021-07-13 19:12:11,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866675589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126320619] [2021-07-13 19:12:11,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:11,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:12:11,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:11,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:11,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:11,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126320619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:11,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:11,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-13 19:12:11,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566643003] [2021-07-13 19:12:11,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:11,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:11,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:11,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:11,117 INFO L87 Difference]: Start difference. First operand 10573 states and 30204 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:11,336 INFO L93 Difference]: Finished difference Result 17407 states and 48712 transitions. [2021-07-13 19:12:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:11,337 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:11,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:11,371 INFO L225 Difference]: With dead ends: 17407 [2021-07-13 19:12:11,371 INFO L226 Difference]: Without dead ends: 17375 [2021-07-13 19:12:11,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17375 states. [2021-07-13 19:12:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17375 to 13902. [2021-07-13 19:12:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13902 states, 13901 states have (on average 2.8969138910869723) internal successors, (40270), 13901 states have internal predecessors, (40270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13902 states to 13902 states and 40270 transitions. [2021-07-13 19:12:11,644 INFO L78 Accepts]: Start accepts. Automaton has 13902 states and 40270 transitions. Word has length 32 [2021-07-13 19:12:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:11,644 INFO L482 AbstractCegarLoop]: Abstraction has 13902 states and 40270 transitions. [2021-07-13 19:12:11,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 13902 states and 40270 transitions. [2021-07-13 19:12:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:11,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:11,649 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:11,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 19:12:11,850 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:11,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1480057355, now seen corresponding path program 49 times [2021-07-13 19:12:11,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:11,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968237091] [2021-07-13 19:12:11,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:11,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:11,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968237091] [2021-07-13 19:12:11,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968237091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:11,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408090921] [2021-07-13 19:12:11,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:11,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:11,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:11,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408090921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:11,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:11,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-13 19:12:11,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801637599] [2021-07-13 19:12:11,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:11,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:11,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:11,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:11,978 INFO L87 Difference]: Start difference. First operand 13902 states and 40270 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:12,163 INFO L93 Difference]: Finished difference Result 17229 states and 47592 transitions. [2021-07-13 19:12:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:12,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:12,200 INFO L225 Difference]: With dead ends: 17229 [2021-07-13 19:12:12,200 INFO L226 Difference]: Without dead ends: 17226 [2021-07-13 19:12:12,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2021-07-13 19:12:12,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 13921. [2021-07-13 19:12:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13921 states, 13920 states have (on average 2.8902298850574715) internal successors, (40232), 13920 states have internal predecessors, (40232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 40232 transitions. [2021-07-13 19:12:12,516 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 40232 transitions. Word has length 32 [2021-07-13 19:12:12,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:12,516 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 40232 transitions. [2021-07-13 19:12:12,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 40232 transitions. [2021-07-13 19:12:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:12,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:12,522 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:12,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-13 19:12:12,723 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:12,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:12,723 INFO L82 PathProgramCache]: Analyzing trace with hash -157515101, now seen corresponding path program 50 times [2021-07-13 19:12:12,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:12,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660147482] [2021-07-13 19:12:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:12,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:12,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660147482] [2021-07-13 19:12:12,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660147482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:12,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516968955] [2021-07-13 19:12:12,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:12,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:12,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:12,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:12,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516968955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:12,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:12,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-07-13 19:12:12,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015657952] [2021-07-13 19:12:12,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:12,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:12,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:12,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:12,836 INFO L87 Difference]: Start difference. First operand 13921 states and 40232 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:13,051 INFO L93 Difference]: Finished difference Result 17332 states and 47741 transitions. [2021-07-13 19:12:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:13,087 INFO L225 Difference]: With dead ends: 17332 [2021-07-13 19:12:13,087 INFO L226 Difference]: Without dead ends: 17329 [2021-07-13 19:12:13,087 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:13,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17329 states. [2021-07-13 19:12:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17329 to 13802. [2021-07-13 19:12:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13801 states have (on average 2.883124411274545) internal successors, (39790), 13801 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 39790 transitions. [2021-07-13 19:12:13,370 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 39790 transitions. Word has length 32 [2021-07-13 19:12:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:13,370 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 39790 transitions. [2021-07-13 19:12:13,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 39790 transitions. [2021-07-13 19:12:13,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-13 19:12:13,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:13,376 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:13,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 19:12:13,576 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash 188377863, now seen corresponding path program 51 times [2021-07-13 19:12:13,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:13,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672531270] [2021-07-13 19:12:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:13,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:13,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672531270] [2021-07-13 19:12:13,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672531270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:13,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958628312] [2021-07-13 19:12:13,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:13,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:12:13,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:13,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:13,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-13 19:12:13,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958628312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:13,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:13,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-13 19:12:13,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314364858] [2021-07-13 19:12:13,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:13,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:13,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:13,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:13,920 INFO L87 Difference]: Start difference. First operand 13802 states and 39790 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:14,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:14,875 INFO L93 Difference]: Finished difference Result 22708 states and 63895 transitions. [2021-07-13 19:12:14,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:12:14,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-13 19:12:14,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:14,926 INFO L225 Difference]: With dead ends: 22708 [2021-07-13 19:12:14,927 INFO L226 Difference]: Without dead ends: 22654 [2021-07-13 19:12:14,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 657.6ms TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:12:14,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22654 states. [2021-07-13 19:12:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22654 to 15246. [2021-07-13 19:12:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15246 states, 15245 states have (on average 2.8751065923253525) internal successors, (43831), 15245 states have internal predecessors, (43831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 43831 transitions. [2021-07-13 19:12:15,338 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 43831 transitions. Word has length 32 [2021-07-13 19:12:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:15,338 INFO L482 AbstractCegarLoop]: Abstraction has 15246 states and 43831 transitions. [2021-07-13 19:12:15,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:15,338 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 43831 transitions. [2021-07-13 19:12:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:15,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:15,346 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:15,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 19:12:15,547 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:15,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:15,547 INFO L82 PathProgramCache]: Analyzing trace with hash -639720651, now seen corresponding path program 9 times [2021-07-13 19:12:15,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:15,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295764825] [2021-07-13 19:12:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:15,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:15,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295764825] [2021-07-13 19:12:15,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295764825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:15,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713057015] [2021-07-13 19:12:15,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:15,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:12:15,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:15,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:15,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713057015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:15,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:15,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:12:15,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391928221] [2021-07-13 19:12:15,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:15,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:15,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:15,698 INFO L87 Difference]: Start difference. First operand 15246 states and 43831 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:16,098 INFO L93 Difference]: Finished difference Result 15940 states and 45262 transitions. [2021-07-13 19:12:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:16,137 INFO L225 Difference]: With dead ends: 15940 [2021-07-13 19:12:16,137 INFO L226 Difference]: Without dead ends: 15903 [2021-07-13 19:12:16,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:12:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15903 states. [2021-07-13 19:12:16,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15903 to 15141. [2021-07-13 19:12:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15141 states, 15140 states have (on average 2.8762879788639366) internal successors, (43547), 15140 states have internal predecessors, (43547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15141 states to 15141 states and 43547 transitions. [2021-07-13 19:12:16,416 INFO L78 Accepts]: Start accepts. Automaton has 15141 states and 43547 transitions. Word has length 35 [2021-07-13 19:12:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:16,416 INFO L482 AbstractCegarLoop]: Abstraction has 15141 states and 43547 transitions. [2021-07-13 19:12:16,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 15141 states and 43547 transitions. [2021-07-13 19:12:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:16,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:16,423 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:16,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:16,624 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:16,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:16,624 INFO L82 PathProgramCache]: Analyzing trace with hash 827459317, now seen corresponding path program 14 times [2021-07-13 19:12:16,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:16,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985497294] [2021-07-13 19:12:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:16,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:16,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985497294] [2021-07-13 19:12:16,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985497294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:16,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344150076] [2021-07-13 19:12:16,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:16,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:16,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:16,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:16,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:16,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344150076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:16,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:16,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:12:16,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673098181] [2021-07-13 19:12:16,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:12:16,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:16,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:12:16,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:16,881 INFO L87 Difference]: Start difference. First operand 15141 states and 43547 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:17,266 INFO L93 Difference]: Finished difference Result 15119 states and 43386 transitions. [2021-07-13 19:12:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:17,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:17,298 INFO L225 Difference]: With dead ends: 15119 [2021-07-13 19:12:17,299 INFO L226 Difference]: Without dead ends: 15016 [2021-07-13 19:12:17,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:17,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15016 states. [2021-07-13 19:12:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15016 to 14977. [2021-07-13 19:12:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-07-13 19:12:17,605 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-07-13 19:12:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:17,605 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-07-13 19:12:17,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:17,605 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-07-13 19:12:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:17,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:17,613 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:17,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 19:12:17,815 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:17,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:17,816 INFO L82 PathProgramCache]: Analyzing trace with hash 999532737, now seen corresponding path program 15 times [2021-07-13 19:12:17,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:17,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919910720] [2021-07-13 19:12:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:17,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:17,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919910720] [2021-07-13 19:12:17,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919910720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:17,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479834937] [2021-07-13 19:12:17,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:17,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:12:17,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:17,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:17,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:17,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479834937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:17,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:17,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:12:17,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181751821] [2021-07-13 19:12:17,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:17,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:17,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:17,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:17,954 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:18,116 INFO L93 Difference]: Finished difference Result 15202 states and 43548 transitions. [2021-07-13 19:12:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:18,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:18,150 INFO L225 Difference]: With dead ends: 15202 [2021-07-13 19:12:18,151 INFO L226 Difference]: Without dead ends: 15202 [2021-07-13 19:12:18,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15202 states. [2021-07-13 19:12:18,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15202 to 14977. [2021-07-13 19:12:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-07-13 19:12:18,420 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-07-13 19:12:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:18,420 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-07-13 19:12:18,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-07-13 19:12:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:18,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:18,428 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:18,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:18,629 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:18,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:18,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1845490552, now seen corresponding path program 10 times [2021-07-13 19:12:18,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:18,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550773150] [2021-07-13 19:12:18,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:18,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:18,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550773150] [2021-07-13 19:12:18,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550773150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:18,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887787224] [2021-07-13 19:12:18,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:18,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:18,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:18,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887787224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:18,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:18,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:12:18,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820527137] [2021-07-13 19:12:18,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:18,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:18,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:18,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:18,768 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:18,990 INFO L93 Difference]: Finished difference Result 16718 states and 46945 transitions. [2021-07-13 19:12:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:19,024 INFO L225 Difference]: With dead ends: 16718 [2021-07-13 19:12:19,024 INFO L226 Difference]: Without dead ends: 16694 [2021-07-13 19:12:19,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:19,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16694 states. [2021-07-13 19:12:19,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16694 to 15013. [2021-07-13 19:12:19,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15013 states, 15012 states have (on average 2.8758326671995738) internal successors, (43172), 15012 states have internal predecessors, (43172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15013 states to 15013 states and 43172 transitions. [2021-07-13 19:12:19,355 INFO L78 Accepts]: Start accepts. Automaton has 15013 states and 43172 transitions. Word has length 35 [2021-07-13 19:12:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:19,355 INFO L482 AbstractCegarLoop]: Abstraction has 15013 states and 43172 transitions. [2021-07-13 19:12:19,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 15013 states and 43172 transitions. [2021-07-13 19:12:19,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:19,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:19,363 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:19,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:19,563 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:19,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:19,563 INFO L82 PathProgramCache]: Analyzing trace with hash -731106251, now seen corresponding path program 16 times [2021-07-13 19:12:19,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:19,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116819001] [2021-07-13 19:12:19,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:19,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:19,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116819001] [2021-07-13 19:12:19,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116819001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:19,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118391566] [2021-07-13 19:12:19,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:19,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:19,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:19,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:19,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:19,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118391566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:19,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:19,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:12:19,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510483726] [2021-07-13 19:12:19,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:19,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:19,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:19,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:19,714 INFO L87 Difference]: Start difference. First operand 15013 states and 43172 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:19,993 INFO L93 Difference]: Finished difference Result 15432 states and 43972 transitions. [2021-07-13 19:12:19,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:19,994 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:20,027 INFO L225 Difference]: With dead ends: 15432 [2021-07-13 19:12:20,027 INFO L226 Difference]: Without dead ends: 15289 [2021-07-13 19:12:20,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15289 states. [2021-07-13 19:12:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15289 to 14996. [2021-07-13 19:12:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14996 states, 14995 states have (on average 2.8635545181727244) internal successors, (42939), 14995 states have internal predecessors, (42939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14996 states to 14996 states and 42939 transitions. [2021-07-13 19:12:20,302 INFO L78 Accepts]: Start accepts. Automaton has 14996 states and 42939 transitions. Word has length 35 [2021-07-13 19:12:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:20,302 INFO L482 AbstractCegarLoop]: Abstraction has 14996 states and 42939 transitions. [2021-07-13 19:12:20,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 14996 states and 42939 transitions. [2021-07-13 19:12:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:20,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:20,309 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:20,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 19:12:20,510 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:20,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:20,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1344642431, now seen corresponding path program 17 times [2021-07-13 19:12:20,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:20,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963838328] [2021-07-13 19:12:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:20,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:20,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963838328] [2021-07-13 19:12:20,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963838328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:20,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634423228] [2021-07-13 19:12:20,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:20,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:12:20,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:20,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:20,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:20,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634423228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:20,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:20,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:12:20,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720300172] [2021-07-13 19:12:20,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:20,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:20,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:20,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:20,661 INFO L87 Difference]: Start difference. First operand 14996 states and 42939 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:20,879 INFO L93 Difference]: Finished difference Result 15805 states and 44721 transitions. [2021-07-13 19:12:20,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:20,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:20,974 INFO L225 Difference]: With dead ends: 15805 [2021-07-13 19:12:20,975 INFO L226 Difference]: Without dead ends: 15793 [2021-07-13 19:12:20,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2021-07-13 19:12:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 15263. [2021-07-13 19:12:21,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15263 states, 15262 states have (on average 2.8567029222906566) internal successors, (43599), 15262 states have internal predecessors, (43599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15263 states to 15263 states and 43599 transitions. [2021-07-13 19:12:21,224 INFO L78 Accepts]: Start accepts. Automaton has 15263 states and 43599 transitions. Word has length 35 [2021-07-13 19:12:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:21,224 INFO L482 AbstractCegarLoop]: Abstraction has 15263 states and 43599 transitions. [2021-07-13 19:12:21,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 15263 states and 43599 transitions. [2021-07-13 19:12:21,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:21,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:21,231 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:21,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 19:12:21,432 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:21,432 INFO L82 PathProgramCache]: Analyzing trace with hash 797274903, now seen corresponding path program 18 times [2021-07-13 19:12:21,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:21,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646101566] [2021-07-13 19:12:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:21,475 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:21,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:21,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646101566] [2021-07-13 19:12:21,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646101566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:21,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522591643] [2021-07-13 19:12:21,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:21,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:12:21,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:21,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:21,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:21,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522591643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:21,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:21,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:21,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051032939] [2021-07-13 19:12:21,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:21,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:21,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:21,569 INFO L87 Difference]: Start difference. First operand 15263 states and 43599 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:21,814 INFO L93 Difference]: Finished difference Result 16259 states and 45639 transitions. [2021-07-13 19:12:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:21,815 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:21,849 INFO L225 Difference]: With dead ends: 16259 [2021-07-13 19:12:21,849 INFO L226 Difference]: Without dead ends: 16247 [2021-07-13 19:12:21,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16247 states. [2021-07-13 19:12:22,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16247 to 14972. [2021-07-13 19:12:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14972 states, 14971 states have (on average 2.854652327833812) internal successors, (42737), 14971 states have internal predecessors, (42737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14972 states to 14972 states and 42737 transitions. [2021-07-13 19:12:22,128 INFO L78 Accepts]: Start accepts. Automaton has 14972 states and 42737 transitions. Word has length 35 [2021-07-13 19:12:22,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:22,128 INFO L482 AbstractCegarLoop]: Abstraction has 14972 states and 42737 transitions. [2021-07-13 19:12:22,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 14972 states and 42737 transitions. [2021-07-13 19:12:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:22,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:22,135 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:22,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:22,336 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1965133284, now seen corresponding path program 19 times [2021-07-13 19:12:22,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:22,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757825103] [2021-07-13 19:12:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:22,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:22,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757825103] [2021-07-13 19:12:22,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757825103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:22,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533514797] [2021-07-13 19:12:22,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:22,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:22,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:22,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533514797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:22,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:22,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:12:22,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143265666] [2021-07-13 19:12:22,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:22,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:22,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:22,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:22,467 INFO L87 Difference]: Start difference. First operand 14972 states and 42737 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:22,685 INFO L93 Difference]: Finished difference Result 15256 states and 43217 transitions. [2021-07-13 19:12:22,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:22,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:22,717 INFO L225 Difference]: With dead ends: 15256 [2021-07-13 19:12:22,717 INFO L226 Difference]: Without dead ends: 15235 [2021-07-13 19:12:22,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:22,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2021-07-13 19:12:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 14340. [2021-07-13 19:12:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14340 states, 14339 states have (on average 2.861078178394588) internal successors, (41025), 14339 states have internal predecessors, (41025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14340 states to 14340 states and 41025 transitions. [2021-07-13 19:12:23,017 INFO L78 Accepts]: Start accepts. Automaton has 14340 states and 41025 transitions. Word has length 35 [2021-07-13 19:12:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:23,017 INFO L482 AbstractCegarLoop]: Abstraction has 14340 states and 41025 transitions. [2021-07-13 19:12:23,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 14340 states and 41025 transitions. [2021-07-13 19:12:23,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:23,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:23,024 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:23,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:12:23,225 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:23,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:23,225 INFO L82 PathProgramCache]: Analyzing trace with hash -729647013, now seen corresponding path program 11 times [2021-07-13 19:12:23,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:23,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394565292] [2021-07-13 19:12:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:23,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:23,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394565292] [2021-07-13 19:12:23,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394565292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:23,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214756625] [2021-07-13 19:12:23,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:23,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:12:23,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:23,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:23,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:23,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214756625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:23,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:23,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:12:23,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012034785] [2021-07-13 19:12:23,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:23,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:23,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:23,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:23,370 INFO L87 Difference]: Start difference. First operand 14340 states and 41025 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:23,573 INFO L93 Difference]: Finished difference Result 15289 states and 42956 transitions. [2021-07-13 19:12:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:23,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:23,600 INFO L225 Difference]: With dead ends: 15289 [2021-07-13 19:12:23,601 INFO L226 Difference]: Without dead ends: 15273 [2021-07-13 19:12:23,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15273 states. [2021-07-13 19:12:23,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15273 to 14606. [2021-07-13 19:12:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 2.8478603218076) internal successors, (41593), 14605 states have internal predecessors, (41593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 41593 transitions. [2021-07-13 19:12:23,857 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 41593 transitions. Word has length 35 [2021-07-13 19:12:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:23,857 INFO L482 AbstractCegarLoop]: Abstraction has 14606 states and 41593 transitions. [2021-07-13 19:12:23,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 41593 transitions. [2021-07-13 19:12:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:23,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:23,864 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:24,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:24,065 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:24,065 INFO L82 PathProgramCache]: Analyzing trace with hash 770685979, now seen corresponding path program 20 times [2021-07-13 19:12:24,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:24,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183397719] [2021-07-13 19:12:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:24,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:24,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183397719] [2021-07-13 19:12:24,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183397719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:24,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987605625] [2021-07-13 19:12:24,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:24,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:24,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:24,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:24,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987605625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:24,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:24,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:12:24,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123799354] [2021-07-13 19:12:24,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:24,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:24,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:24,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:24,201 INFO L87 Difference]: Start difference. First operand 14606 states and 41593 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:24,477 INFO L93 Difference]: Finished difference Result 14012 states and 39306 transitions. [2021-07-13 19:12:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:24,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:24,505 INFO L225 Difference]: With dead ends: 14012 [2021-07-13 19:12:24,505 INFO L226 Difference]: Without dead ends: 13783 [2021-07-13 19:12:24,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2021-07-13 19:12:24,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 13424. [2021-07-13 19:12:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13424 states, 13423 states have (on average 2.8016091782760935) internal successors, (37606), 13423 states have internal predecessors, (37606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 37606 transitions. [2021-07-13 19:12:24,790 INFO L78 Accepts]: Start accepts. Automaton has 13424 states and 37606 transitions. Word has length 35 [2021-07-13 19:12:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:24,790 INFO L482 AbstractCegarLoop]: Abstraction has 13424 states and 37606 transitions. [2021-07-13 19:12:24,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 13424 states and 37606 transitions. [2021-07-13 19:12:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:24,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:24,795 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:24,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:24,996 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1491207704, now seen corresponding path program 21 times [2021-07-13 19:12:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:24,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52068241] [2021-07-13 19:12:24,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:25,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:25,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52068241] [2021-07-13 19:12:25,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52068241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498758070] [2021-07-13 19:12:25,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:25,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:12:25,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:25,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:25,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:25,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498758070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:25,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:12:25,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180259601] [2021-07-13 19:12:25,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:25,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:25,113 INFO L87 Difference]: Start difference. First operand 13424 states and 37606 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:25,270 INFO L93 Difference]: Finished difference Result 14007 states and 38649 transitions. [2021-07-13 19:12:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:25,297 INFO L225 Difference]: With dead ends: 14007 [2021-07-13 19:12:25,297 INFO L226 Difference]: Without dead ends: 13986 [2021-07-13 19:12:25,297 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:25,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13986 states. [2021-07-13 19:12:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13986 to 13395. [2021-07-13 19:12:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13395 states, 13394 states have (on average 2.7938629236971777) internal successors, (37421), 13394 states have internal predecessors, (37421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13395 states to 13395 states and 37421 transitions. [2021-07-13 19:12:25,503 INFO L78 Accepts]: Start accepts. Automaton has 13395 states and 37421 transitions. Word has length 35 [2021-07-13 19:12:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:25,503 INFO L482 AbstractCegarLoop]: Abstraction has 13395 states and 37421 transitions. [2021-07-13 19:12:25,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 13395 states and 37421 transitions. [2021-07-13 19:12:25,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:25,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:25,510 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:25,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:25,710 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:25,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:25,710 INFO L82 PathProgramCache]: Analyzing trace with hash -463341054, now seen corresponding path program 22 times [2021-07-13 19:12:25,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:25,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330424469] [2021-07-13 19:12:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:25,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:25,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330424469] [2021-07-13 19:12:25,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330424469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837349069] [2021-07-13 19:12:25,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:25,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:25,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:25,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:25,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837349069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:25,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:12:25,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141865604] [2021-07-13 19:12:25,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:25,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:25,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:25,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:25,838 INFO L87 Difference]: Start difference. First operand 13395 states and 37421 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:25,983 INFO L93 Difference]: Finished difference Result 13987 states and 38480 transitions. [2021-07-13 19:12:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:25,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:26,011 INFO L225 Difference]: With dead ends: 13987 [2021-07-13 19:12:26,011 INFO L226 Difference]: Without dead ends: 13963 [2021-07-13 19:12:26,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2021-07-13 19:12:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 12486. [2021-07-13 19:12:26,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12486 states, 12485 states have (on average 2.7947937525030038) internal successors, (34893), 12485 states have internal predecessors, (34893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12486 states to 12486 states and 34893 transitions. [2021-07-13 19:12:26,225 INFO L78 Accepts]: Start accepts. Automaton has 12486 states and 34893 transitions. Word has length 35 [2021-07-13 19:12:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:26,225 INFO L482 AbstractCegarLoop]: Abstraction has 12486 states and 34893 transitions. [2021-07-13 19:12:26,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 12486 states and 34893 transitions. [2021-07-13 19:12:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:26,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:26,231 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:26,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 19:12:26,432 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1841063629, now seen corresponding path program 23 times [2021-07-13 19:12:26,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:26,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266267664] [2021-07-13 19:12:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:26,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266267664] [2021-07-13 19:12:26,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266267664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432901659] [2021-07-13 19:12:26,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:26,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:12:26,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:26,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:26,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432901659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:26,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:26,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:12:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118484193] [2021-07-13 19:12:26,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:26,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:26,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:26,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:26,557 INFO L87 Difference]: Start difference. First operand 12486 states and 34893 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:26,823 INFO L93 Difference]: Finished difference Result 12918 states and 35022 transitions. [2021-07-13 19:12:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:26,823 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:26,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:26,847 INFO L225 Difference]: With dead ends: 12918 [2021-07-13 19:12:26,847 INFO L226 Difference]: Without dead ends: 12852 [2021-07-13 19:12:26,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:26,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12852 states. [2021-07-13 19:12:27,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12852 to 9736. [2021-07-13 19:12:27,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9735 states have (on average 2.787057010785824) internal successors, (27132), 9735 states have internal predecessors, (27132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 27132 transitions. [2021-07-13 19:12:27,041 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 27132 transitions. Word has length 35 [2021-07-13 19:12:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:27,041 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 27132 transitions. [2021-07-13 19:12:27,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 27132 transitions. [2021-07-13 19:12:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:27,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:27,046 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:27,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:27,246 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:27,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:27,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1454460952, now seen corresponding path program 24 times [2021-07-13 19:12:27,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:27,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226484383] [2021-07-13 19:12:27,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:27,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:27,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226484383] [2021-07-13 19:12:27,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226484383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:27,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332553074] [2021-07-13 19:12:27,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:27,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:12:27,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:27,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:27,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:27,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332553074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:27,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:27,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:12:27,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136352010] [2021-07-13 19:12:27,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:27,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:27,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:27,370 INFO L87 Difference]: Start difference. First operand 9736 states and 27132 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:27,535 INFO L93 Difference]: Finished difference Result 10128 states and 27807 transitions. [2021-07-13 19:12:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:27,536 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:27,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:27,552 INFO L225 Difference]: With dead ends: 10128 [2021-07-13 19:12:27,552 INFO L226 Difference]: Without dead ends: 10101 [2021-07-13 19:12:27,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-07-13 19:12:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9757. [2021-07-13 19:12:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9757 states, 9756 states have (on average 2.7809553095530957) internal successors, (27131), 9756 states have internal predecessors, (27131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 27131 transitions. [2021-07-13 19:12:27,695 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 27131 transitions. Word has length 35 [2021-07-13 19:12:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:27,695 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 27131 transitions. [2021-07-13 19:12:27,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 27131 transitions. [2021-07-13 19:12:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:27,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:27,700 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:27,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-13 19:12:27,900 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash -208710795, now seen corresponding path program 12 times [2021-07-13 19:12:27,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:27,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802115160] [2021-07-13 19:12:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:27,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:27,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802115160] [2021-07-13 19:12:27,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802115160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:27,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439637529] [2021-07-13 19:12:27,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:27,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:12:27,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:27,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:27,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:28,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439637529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:28,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:28,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:12:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870758495] [2021-07-13 19:12:28,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:28,025 INFO L87 Difference]: Start difference. First operand 9757 states and 27131 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:28,268 INFO L93 Difference]: Finished difference Result 10449 states and 28483 transitions. [2021-07-13 19:12:28,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:28,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:28,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:28,286 INFO L225 Difference]: With dead ends: 10449 [2021-07-13 19:12:28,286 INFO L226 Difference]: Without dead ends: 10431 [2021-07-13 19:12:28,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:28,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-07-13 19:12:28,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9155. [2021-07-13 19:12:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9155 states, 9154 states have (on average 2.7968101376447456) internal successors, (25602), 9154 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 25602 transitions. [2021-07-13 19:12:28,429 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 25602 transitions. Word has length 35 [2021-07-13 19:12:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:28,429 INFO L482 AbstractCegarLoop]: Abstraction has 9155 states and 25602 transitions. [2021-07-13 19:12:28,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 25602 transitions. [2021-07-13 19:12:28,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:28,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:28,434 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:28,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-13 19:12:28,634 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:28,635 INFO L82 PathProgramCache]: Analyzing trace with hash -305893054, now seen corresponding path program 25 times [2021-07-13 19:12:28,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:28,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309383605] [2021-07-13 19:12:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-07-13 19:12:28,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:28,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309383605] [2021-07-13 19:12:28,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309383605] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:28,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:28,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:12:28,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479186130] [2021-07-13 19:12:28,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:12:28,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:28,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:12:28,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:12:28,645 INFO L87 Difference]: Start difference. First operand 9155 states and 25602 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:28,657 INFO L93 Difference]: Finished difference Result 2349 states and 5506 transitions. [2021-07-13 19:12:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:12:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:28,660 INFO L225 Difference]: With dead ends: 2349 [2021-07-13 19:12:28,660 INFO L226 Difference]: Without dead ends: 2331 [2021-07-13 19:12:28,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:12:28,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-07-13 19:12:28,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1380. [2021-07-13 19:12:28,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3343002175489485) internal successors, (3219), 1379 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3219 transitions. [2021-07-13 19:12:28,677 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3219 transitions. Word has length 35 [2021-07-13 19:12:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:28,677 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3219 transitions. [2021-07-13 19:12:28,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3219 transitions. [2021-07-13 19:12:28,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:28,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:28,678 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:28,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-07-13 19:12:28,679 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash -385601739, now seen corresponding path program 26 times [2021-07-13 19:12:28,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:28,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689749500] [2021-07-13 19:12:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:28,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:28,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689749500] [2021-07-13 19:12:28,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689749500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:28,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843881141] [2021-07-13 19:12:28,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:28,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:28,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:28,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:28,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:28,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843881141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:28,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:28,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-13 19:12:28,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543717960] [2021-07-13 19:12:28,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:28,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:28,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:28,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:28,891 INFO L87 Difference]: Start difference. First operand 1380 states and 3219 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:29,073 INFO L93 Difference]: Finished difference Result 1429 states and 3294 transitions. [2021-07-13 19:12:29,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:29,074 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:29,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:29,075 INFO L225 Difference]: With dead ends: 1429 [2021-07-13 19:12:29,075 INFO L226 Difference]: Without dead ends: 1397 [2021-07-13 19:12:29,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-07-13 19:12:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1380. [2021-07-13 19:12:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3299492385786804) internal successors, (3213), 1379 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:29,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3213 transitions. [2021-07-13 19:12:29,087 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3213 transitions. Word has length 35 [2021-07-13 19:12:29,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:29,087 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3213 transitions. [2021-07-13 19:12:29,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:29,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3213 transitions. [2021-07-13 19:12:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:29,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:29,089 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:29,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-13 19:12:29,293 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1551170986, now seen corresponding path program 27 times [2021-07-13 19:12:29,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:29,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600688577] [2021-07-13 19:12:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:29,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:29,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600688577] [2021-07-13 19:12:29,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600688577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:29,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851297717] [2021-07-13 19:12:29,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:29,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:12:29,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:29,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:29,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851297717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:29,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:29,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:12:29,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317079985] [2021-07-13 19:12:29,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:29,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:29,430 INFO L87 Difference]: Start difference. First operand 1380 states and 3213 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:29,549 INFO L93 Difference]: Finished difference Result 2071 states and 4706 transitions. [2021-07-13 19:12:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:29,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:29,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:29,552 INFO L225 Difference]: With dead ends: 2071 [2021-07-13 19:12:29,552 INFO L226 Difference]: Without dead ends: 2071 [2021-07-13 19:12:29,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-07-13 19:12:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1527. [2021-07-13 19:12:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.4023591087811274) internal successors, (3666), 1526 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3666 transitions. [2021-07-13 19:12:29,567 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3666 transitions. Word has length 35 [2021-07-13 19:12:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:29,567 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 3666 transitions. [2021-07-13 19:12:29,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3666 transitions. [2021-07-13 19:12:29,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:29,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:29,569 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:29,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:29,769 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:29,769 INFO L82 PathProgramCache]: Analyzing trace with hash 780335319, now seen corresponding path program 13 times [2021-07-13 19:12:29,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:29,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323241680] [2021-07-13 19:12:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:29,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:29,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323241680] [2021-07-13 19:12:29,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323241680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:29,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281790233] [2021-07-13 19:12:29,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:29,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:29,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:29,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281790233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:29,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:29,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:29,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857540172] [2021-07-13 19:12:29,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:29,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:29,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:29,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:29,901 INFO L87 Difference]: Start difference. First operand 1527 states and 3666 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:30,107 INFO L93 Difference]: Finished difference Result 1909 states and 4411 transitions. [2021-07-13 19:12:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:30,109 INFO L225 Difference]: With dead ends: 1909 [2021-07-13 19:12:30,109 INFO L226 Difference]: Without dead ends: 1905 [2021-07-13 19:12:30,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-07-13 19:12:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1526. [2021-07-13 19:12:30,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.40327868852459) internal successors, (3665), 1525 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3665 transitions. [2021-07-13 19:12:30,125 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3665 transitions. Word has length 35 [2021-07-13 19:12:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:30,125 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3665 transitions. [2021-07-13 19:12:30,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3665 transitions. [2021-07-13 19:12:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:30,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:30,126 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:30,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:30,327 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash -852961065, now seen corresponding path program 28 times [2021-07-13 19:12:30,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:30,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465937705] [2021-07-13 19:12:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:30,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:30,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465937705] [2021-07-13 19:12:30,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465937705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657634660] [2021-07-13 19:12:30,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:30,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:30,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:30,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:30,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:30,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657634660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:30,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:12:30,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784629424] [2021-07-13 19:12:30,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:30,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:30,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:30,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:30,480 INFO L87 Difference]: Start difference. First operand 1526 states and 3665 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:30,637 INFO L93 Difference]: Finished difference Result 1563 states and 3719 transitions. [2021-07-13 19:12:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:30,637 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:30,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:30,639 INFO L225 Difference]: With dead ends: 1563 [2021-07-13 19:12:30,639 INFO L226 Difference]: Without dead ends: 1543 [2021-07-13 19:12:30,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-07-13 19:12:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1526. [2021-07-13 19:12:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.401311475409836) internal successors, (3662), 1525 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3662 transitions. [2021-07-13 19:12:30,653 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3662 transitions. Word has length 35 [2021-07-13 19:12:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:30,654 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3662 transitions. [2021-07-13 19:12:30,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3662 transitions. [2021-07-13 19:12:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:30,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:30,655 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:30,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-13 19:12:30,871 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:30,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1273583998, now seen corresponding path program 29 times [2021-07-13 19:12:30,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:30,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411175266] [2021-07-13 19:12:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:30,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:30,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411175266] [2021-07-13 19:12:30,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411175266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966167172] [2021-07-13 19:12:30,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:30,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:12:30,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:30,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:30,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:30,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966167172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:30,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 9 [2021-07-13 19:12:30,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90179266] [2021-07-13 19:12:30,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:30,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:30,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:30,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:30,992 INFO L87 Difference]: Start difference. First operand 1526 states and 3662 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:31,102 INFO L93 Difference]: Finished difference Result 2415 states and 5508 transitions. [2021-07-13 19:12:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:31,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:31,105 INFO L225 Difference]: With dead ends: 2415 [2021-07-13 19:12:31,105 INFO L226 Difference]: Without dead ends: 2415 [2021-07-13 19:12:31,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-13 19:12:31,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1653. [2021-07-13 19:12:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.4473365617433416) internal successors, (4043), 1652 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4043 transitions. [2021-07-13 19:12:31,123 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4043 transitions. Word has length 35 [2021-07-13 19:12:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:31,123 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 4043 transitions. [2021-07-13 19:12:31,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4043 transitions. [2021-07-13 19:12:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:31,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:31,125 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:31,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:31,332 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:31,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:31,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1511645515, now seen corresponding path program 14 times [2021-07-13 19:12:31,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:31,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831424366] [2021-07-13 19:12:31,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:31,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:31,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831424366] [2021-07-13 19:12:31,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831424366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:31,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981169527] [2021-07-13 19:12:31,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:31,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:31,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:31,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:12:31,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:31,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981169527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:31,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:31,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:12:31,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493231978] [2021-07-13 19:12:31,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:31,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:31,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:31,458 INFO L87 Difference]: Start difference. First operand 1653 states and 4043 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:31,665 INFO L93 Difference]: Finished difference Result 2638 states and 6132 transitions. [2021-07-13 19:12:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:31,665 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:31,668 INFO L225 Difference]: With dead ends: 2638 [2021-07-13 19:12:31,668 INFO L226 Difference]: Without dead ends: 2596 [2021-07-13 19:12:31,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:31,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-07-13 19:12:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1819. [2021-07-13 19:12:31,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.4592959295929595) internal successors, (4471), 1818 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 4471 transitions. [2021-07-13 19:12:31,688 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 4471 transitions. Word has length 35 [2021-07-13 19:12:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:31,688 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 4471 transitions. [2021-07-13 19:12:31,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 4471 transitions. [2021-07-13 19:12:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:31,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:31,690 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:31,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:31,893 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:31,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:31,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1229624924, now seen corresponding path program 30 times [2021-07-13 19:12:31,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:31,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4415467] [2021-07-13 19:12:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:31,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:31,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4415467] [2021-07-13 19:12:31,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4415467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:31,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900045053] [2021-07-13 19:12:31,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:31,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:12:31,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:31,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:31,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:32,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900045053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:32,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:32,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:12:32,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820124379] [2021-07-13 19:12:32,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:32,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:32,011 INFO L87 Difference]: Start difference. First operand 1819 states and 4471 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:32,092 INFO L93 Difference]: Finished difference Result 2408 states and 5562 transitions. [2021-07-13 19:12:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:12:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:32,094 INFO L225 Difference]: With dead ends: 2408 [2021-07-13 19:12:32,094 INFO L226 Difference]: Without dead ends: 2405 [2021-07-13 19:12:32,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-07-13 19:12:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1818. [2021-07-13 19:12:32,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.45789763346175) internal successors, (4466), 1817 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 4466 transitions. [2021-07-13 19:12:32,113 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 4466 transitions. Word has length 35 [2021-07-13 19:12:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:32,113 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 4466 transitions. [2021-07-13 19:12:32,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 4466 transitions. [2021-07-13 19:12:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:32,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:32,114 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:32,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:32,320 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:32,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:32,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1436687490, now seen corresponding path program 31 times [2021-07-13 19:12:32,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:32,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804945426] [2021-07-13 19:12:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:32,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:32,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804945426] [2021-07-13 19:12:32,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804945426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:32,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873098198] [2021-07-13 19:12:32,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:32,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:32,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:32,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873098198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:32,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:32,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:12:32,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120951287] [2021-07-13 19:12:32,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:32,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:32,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:32,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:32,426 INFO L87 Difference]: Start difference. First operand 1818 states and 4466 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:32,503 INFO L93 Difference]: Finished difference Result 2608 states and 6106 transitions. [2021-07-13 19:12:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:12:32,503 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:32,506 INFO L225 Difference]: With dead ends: 2608 [2021-07-13 19:12:32,506 INFO L226 Difference]: Without dead ends: 2596 [2021-07-13 19:12:32,506 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-07-13 19:12:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1953. [2021-07-13 19:12:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.4574795081967213) internal successors, (4797), 1952 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4797 transitions. [2021-07-13 19:12:32,526 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4797 transitions. Word has length 35 [2021-07-13 19:12:32,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:32,527 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 4797 transitions. [2021-07-13 19:12:32,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4797 transitions. [2021-07-13 19:12:32,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:32,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:32,529 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:32,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:32,729 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:32,729 INFO L82 PathProgramCache]: Analyzing trace with hash -11312523, now seen corresponding path program 32 times [2021-07-13 19:12:32,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:32,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068914935] [2021-07-13 19:12:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:32,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068914935] [2021-07-13 19:12:32,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068914935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:32,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937107513] [2021-07-13 19:12:32,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:32,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:32,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:32,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:32,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937107513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:32,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:32,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-13 19:12:32,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149322404] [2021-07-13 19:12:32,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:32,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:32,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:32,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:32,867 INFO L87 Difference]: Start difference. First operand 1953 states and 4797 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:33,058 INFO L93 Difference]: Finished difference Result 2377 states and 5580 transitions. [2021-07-13 19:12:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:33,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:33,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:33,061 INFO L225 Difference]: With dead ends: 2377 [2021-07-13 19:12:33,061 INFO L226 Difference]: Without dead ends: 2298 [2021-07-13 19:12:33,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-13 19:12:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2023. [2021-07-13 19:12:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 2.4416419386745796) internal successors, (4937), 2022 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 4937 transitions. [2021-07-13 19:12:33,081 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 4937 transitions. Word has length 35 [2021-07-13 19:12:33,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:33,081 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 4937 transitions. [2021-07-13 19:12:33,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 4937 transitions. [2021-07-13 19:12:33,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:33,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:33,083 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:33,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 19:12:33,284 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:33,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:33,284 INFO L82 PathProgramCache]: Analyzing trace with hash -624848703, now seen corresponding path program 33 times [2021-07-13 19:12:33,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:33,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70229545] [2021-07-13 19:12:33,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:33,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:33,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70229545] [2021-07-13 19:12:33,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70229545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006049546] [2021-07-13 19:12:33,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:33,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:12:33,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:33,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:33,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006049546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:33,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:12:33,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024788103] [2021-07-13 19:12:33,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:12:33,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:33,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:12:33,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:12:33,409 INFO L87 Difference]: Start difference. First operand 2023 states and 4937 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:33,540 INFO L93 Difference]: Finished difference Result 2392 states and 5647 transitions. [2021-07-13 19:12:33,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:33,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:33,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:33,543 INFO L225 Difference]: With dead ends: 2392 [2021-07-13 19:12:33,543 INFO L226 Difference]: Without dead ends: 2380 [2021-07-13 19:12:33,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-07-13 19:12:33,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2025. [2021-07-13 19:12:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 2.441205533596838) internal successors, (4941), 2024 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4941 transitions. [2021-07-13 19:12:33,564 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4941 transitions. Word has length 35 [2021-07-13 19:12:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:33,564 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 4941 transitions. [2021-07-13 19:12:33,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4941 transitions. [2021-07-13 19:12:33,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:33,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:33,566 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:33,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:33,769 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1517068631, now seen corresponding path program 34 times [2021-07-13 19:12:33,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:33,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900472258] [2021-07-13 19:12:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:33,824 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:33,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:33,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900472258] [2021-07-13 19:12:33,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900472258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242521498] [2021-07-13 19:12:33,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:33,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:33,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:33,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:33,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:33,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242521498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:33,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:33,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199772403] [2021-07-13 19:12:33,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:33,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:33,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:33,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:33,896 INFO L87 Difference]: Start difference. First operand 2025 states and 4941 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:34,158 INFO L93 Difference]: Finished difference Result 3056 states and 7043 transitions. [2021-07-13 19:12:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:12:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:34,162 INFO L225 Difference]: With dead ends: 3056 [2021-07-13 19:12:34,162 INFO L226 Difference]: Without dead ends: 3002 [2021-07-13 19:12:34,162 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:12:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-07-13 19:12:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2084. [2021-07-13 19:12:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.4459913586173787) internal successors, (5095), 2083 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5095 transitions. [2021-07-13 19:12:34,187 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5095 transitions. Word has length 35 [2021-07-13 19:12:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:34,187 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 5095 transitions. [2021-07-13 19:12:34,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5095 transitions. [2021-07-13 19:12:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:34,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:34,189 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:34,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:34,405 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1245339556, now seen corresponding path program 35 times [2021-07-13 19:12:34,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:34,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446050842] [2021-07-13 19:12:34,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:34,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:34,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446050842] [2021-07-13 19:12:34,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446050842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:34,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113125499] [2021-07-13 19:12:34,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:34,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:12:34,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:34,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:34,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:34,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113125499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:34,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:34,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-13 19:12:34,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545196230] [2021-07-13 19:12:34,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:34,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:34,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:34,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:34,533 INFO L87 Difference]: Start difference. First operand 2084 states and 5095 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:34,648 INFO L93 Difference]: Finished difference Result 2889 states and 6691 transitions. [2021-07-13 19:12:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:34,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:34,652 INFO L225 Difference]: With dead ends: 2889 [2021-07-13 19:12:34,652 INFO L226 Difference]: Without dead ends: 2865 [2021-07-13 19:12:34,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-07-13 19:12:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2164. [2021-07-13 19:12:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 2.4678687008784097) internal successors, (5338), 2163 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5338 transitions. [2021-07-13 19:12:34,675 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5338 transitions. Word has length 35 [2021-07-13 19:12:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:34,675 INFO L482 AbstractCegarLoop]: Abstraction has 2164 states and 5338 transitions. [2021-07-13 19:12:34,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5338 transitions. [2021-07-13 19:12:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:34,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:34,677 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:34,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-13 19:12:34,877 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:34,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:34,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1671905165, now seen corresponding path program 36 times [2021-07-13 19:12:34,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:34,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438884326] [2021-07-13 19:12:34,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:34,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:34,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438884326] [2021-07-13 19:12:34,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438884326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:34,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675125468] [2021-07-13 19:12:34,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:34,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:12:34,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:34,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:34,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:35,008 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:35,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675125468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:35,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:35,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:12:35,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141591206] [2021-07-13 19:12:35,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:35,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:35,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:35,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:35,009 INFO L87 Difference]: Start difference. First operand 2164 states and 5338 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:35,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:35,376 INFO L93 Difference]: Finished difference Result 3794 states and 8733 transitions. [2021-07-13 19:12:35,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:12:35,376 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:35,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:35,381 INFO L225 Difference]: With dead ends: 3794 [2021-07-13 19:12:35,381 INFO L226 Difference]: Without dead ends: 3680 [2021-07-13 19:12:35,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:12:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-07-13 19:12:35,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2276. [2021-07-13 19:12:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.474285714285714) internal successors, (5629), 2275 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5629 transitions. [2021-07-13 19:12:35,410 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5629 transitions. Word has length 35 [2021-07-13 19:12:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:35,410 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5629 transitions. [2021-07-13 19:12:35,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5629 transitions. [2021-07-13 19:12:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:35,412 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:35,412 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:35,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:35,621 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:35,622 INFO L82 PathProgramCache]: Analyzing trace with hash 2058507842, now seen corresponding path program 37 times [2021-07-13 19:12:35,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:35,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113907920] [2021-07-13 19:12:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:35,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:35,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:35,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113907920] [2021-07-13 19:12:35,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113907920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:35,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283155050] [2021-07-13 19:12:35,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:35,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:35,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:35,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283155050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:35,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:35,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:12:35,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8780404] [2021-07-13 19:12:35,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:35,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:35,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:35,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:35,766 INFO L87 Difference]: Start difference. First operand 2276 states and 5629 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:35,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:35,873 INFO L93 Difference]: Finished difference Result 2985 states and 6922 transitions. [2021-07-13 19:12:35,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:35,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:35,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:35,877 INFO L225 Difference]: With dead ends: 2985 [2021-07-13 19:12:35,877 INFO L226 Difference]: Without dead ends: 2949 [2021-07-13 19:12:35,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:35,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-07-13 19:12:35,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2276. [2021-07-13 19:12:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.4725274725274726) internal successors, (5625), 2275 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:35,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5625 transitions. [2021-07-13 19:12:35,902 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5625 transitions. Word has length 35 [2021-07-13 19:12:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:35,902 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5625 transitions. [2021-07-13 19:12:35,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5625 transitions. [2021-07-13 19:12:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:35,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:35,904 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:36,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:36,120 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1612213655, now seen corresponding path program 38 times [2021-07-13 19:12:36,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:36,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149806905] [2021-07-13 19:12:36,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:36,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149806905] [2021-07-13 19:12:36,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149806905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261621408] [2021-07-13 19:12:36,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:36,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:36,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261621408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:36,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:12:36,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663072758] [2021-07-13 19:12:36,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:36,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:36,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:36,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:36,246 INFO L87 Difference]: Start difference. First operand 2276 states and 5625 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:36,477 INFO L93 Difference]: Finished difference Result 3037 states and 7074 transitions. [2021-07-13 19:12:36,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:36,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:36,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:36,480 INFO L225 Difference]: With dead ends: 3037 [2021-07-13 19:12:36,480 INFO L226 Difference]: Without dead ends: 2881 [2021-07-13 19:12:36,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 137.9ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:12:36,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-07-13 19:12:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2074. [2021-07-13 19:12:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.4582730342498795) internal successors, (5096), 2073 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5096 transitions. [2021-07-13 19:12:36,502 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5096 transitions. Word has length 35 [2021-07-13 19:12:36,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:36,502 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 5096 transitions. [2021-07-13 19:12:36,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5096 transitions. [2021-07-13 19:12:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:36,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:36,504 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:36,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:36,706 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:36,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1374152138, now seen corresponding path program 15 times [2021-07-13 19:12:36,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:36,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892505873] [2021-07-13 19:12:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:36,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892505873] [2021-07-13 19:12:36,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892505873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811186377] [2021-07-13 19:12:36,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:36,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:12:36,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:36,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:36,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811186377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:36,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-07-13 19:12:36,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965123202] [2021-07-13 19:12:36,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:36,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:36,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:36,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:36,824 INFO L87 Difference]: Start difference. First operand 2074 states and 5096 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:36,981 INFO L93 Difference]: Finished difference Result 2850 states and 6708 transitions. [2021-07-13 19:12:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:36,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:36,985 INFO L225 Difference]: With dead ends: 2850 [2021-07-13 19:12:36,985 INFO L226 Difference]: Without dead ends: 2832 [2021-07-13 19:12:36,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-07-13 19:12:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2298. [2021-07-13 19:12:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.4902046147148456) internal successors, (5720), 2297 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:37,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5720 transitions. [2021-07-13 19:12:37,010 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5720 transitions. Word has length 35 [2021-07-13 19:12:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:37,010 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 5720 transitions. [2021-07-13 19:12:37,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5720 transitions. [2021-07-13 19:12:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:37,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:37,012 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:37,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-07-13 19:12:37,213 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:37,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:37,213 INFO L82 PathProgramCache]: Analyzing trace with hash 752271728, now seen corresponding path program 16 times [2021-07-13 19:12:37,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:37,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231259325] [2021-07-13 19:12:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:37,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:37,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231259325] [2021-07-13 19:12:37,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231259325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:37,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424980497] [2021-07-13 19:12:37,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:37,276 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:37,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:37,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:37,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424980497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:37,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:37,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-07-13 19:12:37,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836614339] [2021-07-13 19:12:37,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:37,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:37,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:37,338 INFO L87 Difference]: Start difference. First operand 2298 states and 5720 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:37,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:37,535 INFO L93 Difference]: Finished difference Result 2847 states and 6724 transitions. [2021-07-13 19:12:37,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:37,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:37,539 INFO L225 Difference]: With dead ends: 2847 [2021-07-13 19:12:37,539 INFO L226 Difference]: Without dead ends: 2847 [2021-07-13 19:12:37,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-07-13 19:12:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2179. [2021-07-13 19:12:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.4724517906336088) internal successors, (5385), 2178 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 5385 transitions. [2021-07-13 19:12:37,566 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 5385 transitions. Word has length 35 [2021-07-13 19:12:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:37,566 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 5385 transitions. [2021-07-13 19:12:37,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:37,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 5385 transitions. [2021-07-13 19:12:37,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-13 19:12:37,568 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:37,568 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:37,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:37,777 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash -789180772, now seen corresponding path program 39 times [2021-07-13 19:12:37,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:37,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233297233] [2021-07-13 19:12:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:37,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:37,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233297233] [2021-07-13 19:12:37,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233297233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:37,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689686394] [2021-07-13 19:12:37,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:37,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:12:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:37,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:12:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:37,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689686394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:37,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:37,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:12:37,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831594003] [2021-07-13 19:12:37,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:37,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:37,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:37,911 INFO L87 Difference]: Start difference. First operand 2179 states and 5385 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:38,060 INFO L93 Difference]: Finished difference Result 2663 states and 6272 transitions. [2021-07-13 19:12:38,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:38,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-13 19:12:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:38,063 INFO L225 Difference]: With dead ends: 2663 [2021-07-13 19:12:38,063 INFO L226 Difference]: Without dead ends: 2616 [2021-07-13 19:12:38,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:38,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-07-13 19:12:38,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2188. [2021-07-13 19:12:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4686785550983084) internal successors, (5399), 2187 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5399 transitions. [2021-07-13 19:12:38,084 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5399 transitions. Word has length 35 [2021-07-13 19:12:38,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:38,084 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 5399 transitions. [2021-07-13 19:12:38,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5399 transitions. [2021-07-13 19:12:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 19:12:38,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:38,086 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:38,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:38,287 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:38,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:38,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1018494725, now seen corresponding path program 40 times [2021-07-13 19:12:38,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:38,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179751364] [2021-07-13 19:12:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:38,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:38,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179751364] [2021-07-13 19:12:38,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179751364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:38,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654802721] [2021-07-13 19:12:38,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:38,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:38,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:38,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654802721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:38,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:38,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-07-13 19:12:38,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176592211] [2021-07-13 19:12:38,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:38,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:38,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:38,503 INFO L87 Difference]: Start difference. First operand 2188 states and 5399 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:39,184 INFO L93 Difference]: Finished difference Result 3588 states and 8244 transitions. [2021-07-13 19:12:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:12:39,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-13 19:12:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:39,190 INFO L225 Difference]: With dead ends: 3588 [2021-07-13 19:12:39,190 INFO L226 Difference]: Without dead ends: 3550 [2021-07-13 19:12:39,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:12:39,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-07-13 19:12:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2578. [2021-07-13 19:12:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.43500194024059) internal successors, (6275), 2577 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 6275 transitions. [2021-07-13 19:12:39,223 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 6275 transitions. Word has length 38 [2021-07-13 19:12:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:39,223 INFO L482 AbstractCegarLoop]: Abstraction has 2578 states and 6275 transitions. [2021-07-13 19:12:39,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 6275 transitions. [2021-07-13 19:12:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 19:12:39,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:39,226 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:39,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:39,427 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash 988310311, now seen corresponding path program 41 times [2021-07-13 19:12:39,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:39,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301641297] [2021-07-13 19:12:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:12:39,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:39,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301641297] [2021-07-13 19:12:39,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301641297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:39,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701170110] [2021-07-13 19:12:39,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:39,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:12:39,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:39,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:12:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:12:39,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701170110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:39,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:39,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:12:39,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134639541] [2021-07-13 19:12:39,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:12:39,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:39,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:12:39,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:39,546 INFO L87 Difference]: Start difference. First operand 2578 states and 6275 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:39,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:39,679 INFO L93 Difference]: Finished difference Result 3224 states and 7683 transitions. [2021-07-13 19:12:39,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:12:39,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-13 19:12:39,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:39,684 INFO L225 Difference]: With dead ends: 3224 [2021-07-13 19:12:39,684 INFO L226 Difference]: Without dead ends: 3189 [2021-07-13 19:12:39,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:39,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-07-13 19:12:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2741. [2021-07-13 19:12:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 2.4572992700729928) internal successors, (6733), 2740 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6733 transitions. [2021-07-13 19:12:39,715 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6733 transitions. Word has length 38 [2021-07-13 19:12:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:39,715 INFO L482 AbstractCegarLoop]: Abstraction has 2741 states and 6733 transitions. [2021-07-13 19:12:39,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6733 transitions. [2021-07-13 19:12:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 19:12:39,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:39,717 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:39,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-13 19:12:39,921 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:39,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1650028221, now seen corresponding path program 42 times [2021-07-13 19:12:39,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:39,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238019913] [2021-07-13 19:12:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:12:39,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238019913] [2021-07-13 19:12:39,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238019913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427123492] [2021-07-13 19:12:39,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:39,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:12:39,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:39,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:39,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:40,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427123492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:40,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-07-13 19:12:40,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36848858] [2021-07-13 19:12:40,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:40,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:40,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:40,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:40,085 INFO L87 Difference]: Start difference. First operand 2741 states and 6733 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:40,562 INFO L93 Difference]: Finished difference Result 4464 states and 10129 transitions. [2021-07-13 19:12:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:12:40,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-13 19:12:40,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:40,568 INFO L225 Difference]: With dead ends: 4464 [2021-07-13 19:12:40,568 INFO L226 Difference]: Without dead ends: 4401 [2021-07-13 19:12:40,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:12:40,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-07-13 19:12:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2892. [2021-07-13 19:12:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 2.4787270840539604) internal successors, (7166), 2891 states have internal predecessors, (7166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 7166 transitions. [2021-07-13 19:12:40,604 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 7166 transitions. Word has length 38 [2021-07-13 19:12:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:40,604 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 7166 transitions. [2021-07-13 19:12:40,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 7166 transitions. [2021-07-13 19:12:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 19:12:40,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:40,607 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:40,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:40,807 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1035175619, now seen corresponding path program 43 times [2021-07-13 19:12:40,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:40,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052528231] [2021-07-13 19:12:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:40,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:40,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052528231] [2021-07-13 19:12:40,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052528231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403423832] [2021-07-13 19:12:40,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:40,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:12:40,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:40,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403423832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:40,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:12:40,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748019549] [2021-07-13 19:12:40,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:12:40,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:40,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:12:40,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:40,912 INFO L87 Difference]: Start difference. First operand 2892 states and 7166 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:41,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:41,039 INFO L93 Difference]: Finished difference Result 3617 states and 8704 transitions. [2021-07-13 19:12:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:12:41,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-13 19:12:41,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:41,044 INFO L225 Difference]: With dead ends: 3617 [2021-07-13 19:12:41,044 INFO L226 Difference]: Without dead ends: 3592 [2021-07-13 19:12:41,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-07-13 19:12:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3175. [2021-07-13 19:12:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 2.4697542533081287) internal successors, (7839), 3174 states have internal predecessors, (7839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 7839 transitions. [2021-07-13 19:12:41,077 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 7839 transitions. Word has length 38 [2021-07-13 19:12:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:41,077 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 7839 transitions. [2021-07-13 19:12:41,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 7839 transitions. [2021-07-13 19:12:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:41,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:41,080 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:41,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-07-13 19:12:41,283 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:41,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:41,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282616, now seen corresponding path program 17 times [2021-07-13 19:12:41,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:41,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205494597] [2021-07-13 19:12:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:41,362 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:41,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:41,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205494597] [2021-07-13 19:12:41,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205494597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:41,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300644838] [2021-07-13 19:12:41,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:41,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:12:41,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:41,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:41,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:41,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300644838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:41,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:41,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:12:41,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089716782] [2021-07-13 19:12:41,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:41,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:41,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:41,447 INFO L87 Difference]: Start difference. First operand 3175 states and 7839 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:41,873 INFO L93 Difference]: Finished difference Result 4225 states and 9893 transitions. [2021-07-13 19:12:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:12:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:41,879 INFO L225 Difference]: With dead ends: 4225 [2021-07-13 19:12:41,879 INFO L226 Difference]: Without dead ends: 4189 [2021-07-13 19:12:41,879 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 225.6ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:12:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-07-13 19:12:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3084. [2021-07-13 19:12:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.480051897502433) internal successors, (7646), 3083 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:41,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7646 transitions. [2021-07-13 19:12:41,916 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7646 transitions. Word has length 41 [2021-07-13 19:12:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:41,916 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7646 transitions. [2021-07-13 19:12:41,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:41,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7646 transitions. [2021-07-13 19:12:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:41,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:41,919 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:42,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:42,119 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:42,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1492128392, now seen corresponding path program 44 times [2021-07-13 19:12:42,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:42,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702577321] [2021-07-13 19:12:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:42,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702577321] [2021-07-13 19:12:42,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702577321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045311299] [2021-07-13 19:12:42,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:42,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:42,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:42,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:42,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045311299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:42,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:42,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-13 19:12:42,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955080944] [2021-07-13 19:12:42,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:42,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:42,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:42,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:42,400 INFO L87 Difference]: Start difference. First operand 3084 states and 7646 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:42,847 INFO L93 Difference]: Finished difference Result 3304 states and 7993 transitions. [2021-07-13 19:12:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:42,848 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:42,852 INFO L225 Difference]: With dead ends: 3304 [2021-07-13 19:12:42,852 INFO L226 Difference]: Without dead ends: 3236 [2021-07-13 19:12:42,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-07-13 19:12:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3084. [2021-07-13 19:12:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.474862147259163) internal successors, (7630), 3083 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7630 transitions. [2021-07-13 19:12:42,885 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7630 transitions. Word has length 41 [2021-07-13 19:12:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:42,886 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7630 transitions. [2021-07-13 19:12:42,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7630 transitions. [2021-07-13 19:12:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:42,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:42,888 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:43,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-13 19:12:43,089 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:43,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:43,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1073103992, now seen corresponding path program 45 times [2021-07-13 19:12:43,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:43,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025453672] [2021-07-13 19:12:43,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:43,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:43,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025453672] [2021-07-13 19:12:43,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025453672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:43,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785109402] [2021-07-13 19:12:43,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:43,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:12:43,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:43,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:43,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:43,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785109402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:43,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:43,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:43,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273330150] [2021-07-13 19:12:43,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:43,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:43,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:43,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:43,235 INFO L87 Difference]: Start difference. First operand 3084 states and 7630 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:43,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:43,440 INFO L93 Difference]: Finished difference Result 3450 states and 8325 transitions. [2021-07-13 19:12:43,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:43,440 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:43,445 INFO L225 Difference]: With dead ends: 3450 [2021-07-13 19:12:43,445 INFO L226 Difference]: Without dead ends: 3450 [2021-07-13 19:12:43,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:43,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-07-13 19:12:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3096. [2021-07-13 19:12:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 2.477221324717286) internal successors, (7667), 3095 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 7667 transitions. [2021-07-13 19:12:43,479 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 7667 transitions. Word has length 41 [2021-07-13 19:12:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:43,479 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 7667 transitions. [2021-07-13 19:12:43,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:43,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 7667 transitions. [2021-07-13 19:12:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:43,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:43,482 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:43,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-13 19:12:43,682 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:43,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:43,682 INFO L82 PathProgramCache]: Analyzing trace with hash 665060437, now seen corresponding path program 18 times [2021-07-13 19:12:43,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:43,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457468322] [2021-07-13 19:12:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:43,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:43,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457468322] [2021-07-13 19:12:43,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457468322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:43,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551765040] [2021-07-13 19:12:43,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:43,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:12:43,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:43,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:43,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:43,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551765040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:43,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:43,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-07-13 19:12:43,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628907053] [2021-07-13 19:12:43,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:12:43,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:43,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:12:43,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:43,854 INFO L87 Difference]: Start difference. First operand 3096 states and 7667 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:44,058 INFO L93 Difference]: Finished difference Result 4321 states and 10236 transitions. [2021-07-13 19:12:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:44,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:44,064 INFO L225 Difference]: With dead ends: 4321 [2021-07-13 19:12:44,064 INFO L226 Difference]: Without dead ends: 4263 [2021-07-13 19:12:44,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:12:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-07-13 19:12:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3240. [2021-07-13 19:12:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 2.4902747761654833) internal successors, (8066), 3239 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 8066 transitions. [2021-07-13 19:12:44,103 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 8066 transitions. Word has length 41 [2021-07-13 19:12:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:44,103 INFO L482 AbstractCegarLoop]: Abstraction has 3240 states and 8066 transitions. [2021-07-13 19:12:44,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 8066 transitions. [2021-07-13 19:12:44,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:44,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:44,106 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:44,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 19:12:44,307 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:44,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:44,307 INFO L82 PathProgramCache]: Analyzing trace with hash 9364347, now seen corresponding path program 19 times [2021-07-13 19:12:44,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:44,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709115233] [2021-07-13 19:12:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:44,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:44,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709115233] [2021-07-13 19:12:44,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709115233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047289798] [2021-07-13 19:12:44,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:44,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:44,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:44,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047289798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:44,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-13 19:12:44,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235741486] [2021-07-13 19:12:44,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:44,434 INFO L87 Difference]: Start difference. First operand 3240 states and 8066 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:44,548 INFO L93 Difference]: Finished difference Result 4797 states and 11528 transitions. [2021-07-13 19:12:44,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:44,555 INFO L225 Difference]: With dead ends: 4797 [2021-07-13 19:12:44,555 INFO L226 Difference]: Without dead ends: 4797 [2021-07-13 19:12:44,555 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-07-13 19:12:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3486. [2021-07-13 19:12:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.5265423242467717) internal successors, (8805), 3485 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8805 transitions. [2021-07-13 19:12:44,601 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8805 transitions. Word has length 41 [2021-07-13 19:12:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:44,601 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 8805 transitions. [2021-07-13 19:12:44,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8805 transitions. [2021-07-13 19:12:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:44,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:44,604 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:44,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:44,811 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:44,811 INFO L82 PathProgramCache]: Analyzing trace with hash -524501029, now seen corresponding path program 46 times [2021-07-13 19:12:44,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:44,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739773923] [2021-07-13 19:12:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:44,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:44,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739773923] [2021-07-13 19:12:44,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739773923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636316701] [2021-07-13 19:12:44,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:44,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:44,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:44,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:44,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:44,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636316701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:44,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:12:44,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165859671] [2021-07-13 19:12:44,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:44,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:44,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:44,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:44,938 INFO L87 Difference]: Start difference. First operand 3486 states and 8805 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:45,047 INFO L93 Difference]: Finished difference Result 3733 states and 9242 transitions. [2021-07-13 19:12:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:12:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:45,052 INFO L225 Difference]: With dead ends: 3733 [2021-07-13 19:12:45,052 INFO L226 Difference]: Without dead ends: 3727 [2021-07-13 19:12:45,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:45,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-07-13 19:12:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3447. [2021-07-13 19:12:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 2.5194428322692977) internal successors, (8682), 3446 states have internal predecessors, (8682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 8682 transitions. [2021-07-13 19:12:45,090 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 8682 transitions. Word has length 41 [2021-07-13 19:12:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:45,090 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 8682 transitions. [2021-07-13 19:12:45,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 8682 transitions. [2021-07-13 19:12:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:45,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:45,093 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:45,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-07-13 19:12:45,294 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:45,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1583917210, now seen corresponding path program 20 times [2021-07-13 19:12:45,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:45,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896671734] [2021-07-13 19:12:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:45,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:45,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896671734] [2021-07-13 19:12:45,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896671734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:45,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076738121] [2021-07-13 19:12:45,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:45,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:45,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:45,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:45,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:45,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076738121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:45,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:45,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:45,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437817415] [2021-07-13 19:12:45,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:45,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:45,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:45,451 INFO L87 Difference]: Start difference. First operand 3447 states and 8682 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:45,657 INFO L93 Difference]: Finished difference Result 4309 states and 10396 transitions. [2021-07-13 19:12:45,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:45,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:45,663 INFO L225 Difference]: With dead ends: 4309 [2021-07-13 19:12:45,663 INFO L226 Difference]: Without dead ends: 4278 [2021-07-13 19:12:45,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-07-13 19:12:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3497. [2021-07-13 19:12:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 2.5160183066361554) internal successors, (8796), 3496 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 8796 transitions. [2021-07-13 19:12:45,702 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 8796 transitions. Word has length 41 [2021-07-13 19:12:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:45,702 INFO L482 AbstractCegarLoop]: Abstraction has 3497 states and 8796 transitions. [2021-07-13 19:12:45,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 8796 transitions. [2021-07-13 19:12:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:45,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:45,706 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:45,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:45,906 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:45,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:45,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1157353229, now seen corresponding path program 47 times [2021-07-13 19:12:45,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:45,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722005167] [2021-07-13 19:12:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:45,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722005167] [2021-07-13 19:12:45,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722005167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194370627] [2021-07-13 19:12:45,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:45,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:12:45,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:45,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:45,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:46,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194370627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:46,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2021-07-13 19:12:46,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358148161] [2021-07-13 19:12:46,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:46,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:46,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:46,042 INFO L87 Difference]: Start difference. First operand 3497 states and 8796 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:46,205 INFO L93 Difference]: Finished difference Result 4421 states and 10653 transitions. [2021-07-13 19:12:46,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:46,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:46,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:46,211 INFO L225 Difference]: With dead ends: 4421 [2021-07-13 19:12:46,211 INFO L226 Difference]: Without dead ends: 4412 [2021-07-13 19:12:46,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-07-13 19:12:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3587. [2021-07-13 19:12:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5312325711098715) internal successors, (9077), 3586 states have internal predecessors, (9077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9077 transitions. [2021-07-13 19:12:46,262 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9077 transitions. Word has length 41 [2021-07-13 19:12:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:46,262 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9077 transitions. [2021-07-13 19:12:46,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9077 transitions. [2021-07-13 19:12:46,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:46,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:46,266 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:46,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-13 19:12:46,483 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:46,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1364415795, now seen corresponding path program 48 times [2021-07-13 19:12:46,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:46,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392061329] [2021-07-13 19:12:46,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:46,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:46,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392061329] [2021-07-13 19:12:46,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392061329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951084768] [2021-07-13 19:12:46,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:46,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:12:46,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:46,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:46,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:46,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951084768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:46,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:12:46,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531311452] [2021-07-13 19:12:46,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:46,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:46,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:46,605 INFO L87 Difference]: Start difference. First operand 3587 states and 9077 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:46,738 INFO L93 Difference]: Finished difference Result 4253 states and 10263 transitions. [2021-07-13 19:12:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:46,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:46,744 INFO L225 Difference]: With dead ends: 4253 [2021-07-13 19:12:46,744 INFO L226 Difference]: Without dead ends: 4235 [2021-07-13 19:12:46,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-07-13 19:12:46,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3587. [2021-07-13 19:12:46,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5284439486893473) internal successors, (9067), 3586 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9067 transitions. [2021-07-13 19:12:46,784 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9067 transitions. Word has length 41 [2021-07-13 19:12:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:46,784 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9067 transitions. [2021-07-13 19:12:46,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9067 transitions. [2021-07-13 19:12:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:46,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:46,787 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:46,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-13 19:12:46,989 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:46,989 INFO L82 PathProgramCache]: Analyzing trace with hash -83584218, now seen corresponding path program 49 times [2021-07-13 19:12:46,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:46,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211128332] [2021-07-13 19:12:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:47,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:47,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211128332] [2021-07-13 19:12:47,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211128332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:47,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664796113] [2021-07-13 19:12:47,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:47,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:47,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664796113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:47,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:47,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:12:47,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419055730] [2021-07-13 19:12:47,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:47,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:47,151 INFO L87 Difference]: Start difference. First operand 3587 states and 9067 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:47,497 INFO L93 Difference]: Finished difference Result 4054 states and 9921 transitions. [2021-07-13 19:12:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:47,503 INFO L225 Difference]: With dead ends: 4054 [2021-07-13 19:12:47,503 INFO L226 Difference]: Without dead ends: 4016 [2021-07-13 19:12:47,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-07-13 19:12:47,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3593. [2021-07-13 19:12:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3592 states have (on average 2.525055679287305) internal successors, (9070), 3592 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 9070 transitions. [2021-07-13 19:12:47,545 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 9070 transitions. Word has length 41 [2021-07-13 19:12:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:47,545 INFO L482 AbstractCegarLoop]: Abstraction has 3593 states and 9070 transitions. [2021-07-13 19:12:47,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 9070 transitions. [2021-07-13 19:12:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:47,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:47,549 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:47,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-13 19:12:47,753 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash -697120398, now seen corresponding path program 50 times [2021-07-13 19:12:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:47,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022066495] [2021-07-13 19:12:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:47,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:47,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022066495] [2021-07-13 19:12:47,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022066495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:47,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562909290] [2021-07-13 19:12:47,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:47,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:47,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:47,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:47,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:47,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562909290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:47,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:47,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470540919] [2021-07-13 19:12:47,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:47,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:47,893 INFO L87 Difference]: Start difference. First operand 3593 states and 9070 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:48,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:48,106 INFO L93 Difference]: Finished difference Result 4259 states and 10390 transitions. [2021-07-13 19:12:48,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:48,107 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:48,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:48,112 INFO L225 Difference]: With dead ends: 4259 [2021-07-13 19:12:48,112 INFO L226 Difference]: Without dead ends: 4247 [2021-07-13 19:12:48,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-07-13 19:12:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3595. [2021-07-13 19:12:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3594 states have (on average 2.5242070116861437) internal successors, (9072), 3594 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 9072 transitions. [2021-07-13 19:12:48,159 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 9072 transitions. Word has length 41 [2021-07-13 19:12:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:48,159 INFO L482 AbstractCegarLoop]: Abstraction has 3595 states and 9072 transitions. [2021-07-13 19:12:48,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 9072 transitions. [2021-07-13 19:12:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:48,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:48,163 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:48,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:48,368 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:48,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:48,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1444796936, now seen corresponding path program 51 times [2021-07-13 19:12:48,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:48,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088512269] [2021-07-13 19:12:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:48,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:48,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088512269] [2021-07-13 19:12:48,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088512269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:48,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340193838] [2021-07-13 19:12:48,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:48,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:12:48,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:48,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:48,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:48,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340193838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:48,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:48,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:12:48,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589872860] [2021-07-13 19:12:48,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:48,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:48,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:48,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:48,505 INFO L87 Difference]: Start difference. First operand 3595 states and 9072 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:48,792 INFO L93 Difference]: Finished difference Result 4613 states and 11146 transitions. [2021-07-13 19:12:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:48,798 INFO L225 Difference]: With dead ends: 4613 [2021-07-13 19:12:48,798 INFO L226 Difference]: Without dead ends: 4601 [2021-07-13 19:12:48,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-07-13 19:12:48,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3620. [2021-07-13 19:12:48,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 2.5230726720088423) internal successors, (9131), 3619 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9131 transitions. [2021-07-13 19:12:48,841 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9131 transitions. Word has length 41 [2021-07-13 19:12:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:48,841 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 9131 transitions. [2021-07-13 19:12:48,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9131 transitions. [2021-07-13 19:12:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:48,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:48,845 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:49,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:49,045 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:49,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:49,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1206735419, now seen corresponding path program 21 times [2021-07-13 19:12:49,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:49,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112876878] [2021-07-13 19:12:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:49,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:49,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112876878] [2021-07-13 19:12:49,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112876878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:49,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642465054] [2021-07-13 19:12:49,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:49,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:12:49,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:49,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:49,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:49,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642465054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:49,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:49,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-13 19:12:49,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346517715] [2021-07-13 19:12:49,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:49,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:49,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:49,171 INFO L87 Difference]: Start difference. First operand 3620 states and 9131 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:49,305 INFO L93 Difference]: Finished difference Result 4855 states and 11693 transitions. [2021-07-13 19:12:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:49,305 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:49,312 INFO L225 Difference]: With dead ends: 4855 [2021-07-13 19:12:49,312 INFO L226 Difference]: Without dead ends: 4847 [2021-07-13 19:12:49,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-07-13 19:12:49,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3739. [2021-07-13 19:12:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 2.537720706260032) internal successors, (9486), 3738 states have internal predecessors, (9486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 9486 transitions. [2021-07-13 19:12:49,361 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 9486 transitions. Word has length 41 [2021-07-13 19:12:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:49,361 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 9486 transitions. [2021-07-13 19:12:49,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 9486 transitions. [2021-07-13 19:12:49,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:49,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:49,364 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:49,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:49,565 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:49,565 INFO L82 PathProgramCache]: Analyzing trace with hash 584855009, now seen corresponding path program 22 times [2021-07-13 19:12:49,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:49,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341053156] [2021-07-13 19:12:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:49,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:49,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341053156] [2021-07-13 19:12:49,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341053156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:49,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983126761] [2021-07-13 19:12:49,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:49,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:49,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:49,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:49,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:49,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983126761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:49,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:49,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-13 19:12:49,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986681220] [2021-07-13 19:12:49,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:49,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:49,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:49,690 INFO L87 Difference]: Start difference. First operand 3739 states and 9486 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:49,828 INFO L93 Difference]: Finished difference Result 5507 states and 13181 transitions. [2021-07-13 19:12:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:49,828 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:49,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:49,834 INFO L225 Difference]: With dead ends: 5507 [2021-07-13 19:12:49,835 INFO L226 Difference]: Without dead ends: 5507 [2021-07-13 19:12:49,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:49,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-07-13 19:12:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3748. [2021-07-13 19:12:49,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 2.536962903656258) internal successors, (9506), 3747 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 9506 transitions. [2021-07-13 19:12:49,882 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 9506 transitions. Word has length 41 [2021-07-13 19:12:49,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:49,882 INFO L482 AbstractCegarLoop]: Abstraction has 3748 states and 9506 transitions. [2021-07-13 19:12:49,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 9506 transitions. [2021-07-13 19:12:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:49,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:49,885 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:50,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-13 19:12:50,086 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1052717447, now seen corresponding path program 23 times [2021-07-13 19:12:50,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:50,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433515044] [2021-07-13 19:12:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:50,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:50,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433515044] [2021-07-13 19:12:50,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433515044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639504653] [2021-07-13 19:12:50,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:50,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:12:50,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:50,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:50,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:50,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639504653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:50,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-07-13 19:12:50,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606750152] [2021-07-13 19:12:50,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:50,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:50,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:50,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:50,263 INFO L87 Difference]: Start difference. First operand 3748 states and 9506 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:50,489 INFO L93 Difference]: Finished difference Result 5032 states and 12054 transitions. [2021-07-13 19:12:50,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:50,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:50,495 INFO L225 Difference]: With dead ends: 5032 [2021-07-13 19:12:50,495 INFO L226 Difference]: Without dead ends: 5032 [2021-07-13 19:12:50,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:12:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2021-07-13 19:12:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 3584. [2021-07-13 19:12:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.521629919062238) internal successors, (9035), 3583 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9035 transitions. [2021-07-13 19:12:50,541 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9035 transitions. Word has length 41 [2021-07-13 19:12:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:50,541 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9035 transitions. [2021-07-13 19:12:50,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9035 transitions. [2021-07-13 19:12:50,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:50,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:50,544 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:50,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-13 19:12:50,745 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:50,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:50,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1317611251, now seen corresponding path program 52 times [2021-07-13 19:12:50,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:50,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832182357] [2021-07-13 19:12:50,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:50,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:50,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832182357] [2021-07-13 19:12:50,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832182357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727213756] [2021-07-13 19:12:50,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:50,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:50,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:50,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:50,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:50,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727213756] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:50,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:12:50,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010951195] [2021-07-13 19:12:50,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:50,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:50,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:50,871 INFO L87 Difference]: Start difference. First operand 3584 states and 9035 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:51,011 INFO L93 Difference]: Finished difference Result 4100 states and 9963 transitions. [2021-07-13 19:12:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:51,012 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:51,017 INFO L225 Difference]: With dead ends: 4100 [2021-07-13 19:12:51,017 INFO L226 Difference]: Without dead ends: 4082 [2021-07-13 19:12:51,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:51,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-07-13 19:12:51,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3584. [2021-07-13 19:12:51,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.520234440413062) internal successors, (9030), 3583 states have internal predecessors, (9030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9030 transitions. [2021-07-13 19:12:51,057 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9030 transitions. Word has length 41 [2021-07-13 19:12:51,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:51,057 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9030 transitions. [2021-07-13 19:12:51,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9030 transitions. [2021-07-13 19:12:51,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:51,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:51,060 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:51,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 19:12:51,261 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1869360074, now seen corresponding path program 24 times [2021-07-13 19:12:51,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:51,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937185822] [2021-07-13 19:12:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:51,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937185822] [2021-07-13 19:12:51,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937185822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014479825] [2021-07-13 19:12:51,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:51,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:12:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:51,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014479825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:51,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:51,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:51,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650679081] [2021-07-13 19:12:51,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:51,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:51,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:51,399 INFO L87 Difference]: Start difference. First operand 3584 states and 9030 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:51,619 INFO L93 Difference]: Finished difference Result 4419 states and 10697 transitions. [2021-07-13 19:12:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:51,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:51,625 INFO L225 Difference]: With dead ends: 4419 [2021-07-13 19:12:51,625 INFO L226 Difference]: Without dead ends: 4397 [2021-07-13 19:12:51,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:51,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-07-13 19:12:51,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3612. [2021-07-13 19:12:51,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.5206314040432014) internal successors, (9102), 3611 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9102 transitions. [2021-07-13 19:12:51,669 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9102 transitions. Word has length 41 [2021-07-13 19:12:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:51,669 INFO L482 AbstractCegarLoop]: Abstraction has 3612 states and 9102 transitions. [2021-07-13 19:12:51,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9102 transitions. [2021-07-13 19:12:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:51,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:51,673 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:51,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-13 19:12:51,873 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:51,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:51,874 INFO L82 PathProgramCache]: Analyzing trace with hash -925274230, now seen corresponding path program 53 times [2021-07-13 19:12:51,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:51,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299461453] [2021-07-13 19:12:51,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:51,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:51,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299461453] [2021-07-13 19:12:51,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299461453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:51,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854222950] [2021-07-13 19:12:51,931 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:51,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:12:51,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:51,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:51,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:52,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854222950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:52,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:12:52,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802207702] [2021-07-13 19:12:52,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:52,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:52,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:52,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:52,050 INFO L87 Difference]: Start difference. First operand 3612 states and 9102 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:52,350 INFO L93 Difference]: Finished difference Result 4113 states and 10023 transitions. [2021-07-13 19:12:52,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:52,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:52,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:52,356 INFO L225 Difference]: With dead ends: 4113 [2021-07-13 19:12:52,356 INFO L226 Difference]: Without dead ends: 4057 [2021-07-13 19:12:52,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-07-13 19:12:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3639. [2021-07-13 19:12:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 2.51456844420011) internal successors, (9148), 3638 states have internal predecessors, (9148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 9148 transitions. [2021-07-13 19:12:52,395 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 9148 transitions. Word has length 41 [2021-07-13 19:12:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:52,395 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 9148 transitions. [2021-07-13 19:12:52,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 9148 transitions. [2021-07-13 19:12:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:52,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:52,399 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:52,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:52,599 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1538810410, now seen corresponding path program 54 times [2021-07-13 19:12:52,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:52,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699962783] [2021-07-13 19:12:52,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:52,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:52,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699962783] [2021-07-13 19:12:52,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699962783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35706] [2021-07-13 19:12:52,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:52,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:12:52,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:52,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:52,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:52,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:52,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:52,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687234077] [2021-07-13 19:12:52,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:52,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:52,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:52,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:52,742 INFO L87 Difference]: Start difference. First operand 3639 states and 9148 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:52,969 INFO L93 Difference]: Finished difference Result 4375 states and 10599 transitions. [2021-07-13 19:12:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:52,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:52,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:52,975 INFO L225 Difference]: With dead ends: 4375 [2021-07-13 19:12:52,976 INFO L226 Difference]: Without dead ends: 4363 [2021-07-13 19:12:52,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:52,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-07-13 19:12:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3649. [2021-07-13 19:12:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 2.513157894736842) internal successors, (9168), 3648 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 9168 transitions. [2021-07-13 19:12:53,018 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 9168 transitions. Word has length 41 [2021-07-13 19:12:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:53,018 INFO L482 AbstractCegarLoop]: Abstraction has 3649 states and 9168 transitions. [2021-07-13 19:12:53,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 9168 transitions. [2021-07-13 19:12:53,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:53,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:53,021 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:53,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:53,222 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:53,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1696109897, now seen corresponding path program 25 times [2021-07-13 19:12:53,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:53,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983857080] [2021-07-13 19:12:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:53,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:53,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983857080] [2021-07-13 19:12:53,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983857080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719842886] [2021-07-13 19:12:53,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:53,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:53,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:53,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719842886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:53,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-13 19:12:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459739286] [2021-07-13 19:12:53,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:53,346 INFO L87 Difference]: Start difference. First operand 3649 states and 9168 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:53,469 INFO L93 Difference]: Finished difference Result 4653 states and 11200 transitions. [2021-07-13 19:12:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:12:53,469 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:53,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:53,475 INFO L225 Difference]: With dead ends: 4653 [2021-07-13 19:12:53,476 INFO L226 Difference]: Without dead ends: 4643 [2021-07-13 19:12:53,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:53,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2021-07-13 19:12:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3759. [2021-07-13 19:12:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.5172964342735495) internal successors, (9460), 3758 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9460 transitions. [2021-07-13 19:12:53,525 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9460 transitions. Word has length 41 [2021-07-13 19:12:53,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:53,525 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 9460 transitions. [2021-07-13 19:12:53,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9460 transitions. [2021-07-13 19:12:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:53,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:53,529 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:53,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:53,729 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:53,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:53,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1107799383, now seen corresponding path program 55 times [2021-07-13 19:12:53,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:53,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625072353] [2021-07-13 19:12:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:53,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625072353] [2021-07-13 19:12:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625072353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194382391] [2021-07-13 19:12:53,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:53,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:53,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:53,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194382391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:53,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:12:53,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864724055] [2021-07-13 19:12:53,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:53,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:53,851 INFO L87 Difference]: Start difference. First operand 3759 states and 9460 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:53,974 INFO L93 Difference]: Finished difference Result 4425 states and 10642 transitions. [2021-07-13 19:12:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:53,974 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:53,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:53,981 INFO L225 Difference]: With dead ends: 4425 [2021-07-13 19:12:53,981 INFO L226 Difference]: Without dead ends: 4407 [2021-07-13 19:12:53,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-07-13 19:12:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3746. [2021-07-13 19:12:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3745 states have (on average 2.5124165554072095) internal successors, (9409), 3745 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 9409 transitions. [2021-07-13 19:12:54,037 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 9409 transitions. Word has length 41 [2021-07-13 19:12:54,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:54,037 INFO L482 AbstractCegarLoop]: Abstraction has 3746 states and 9409 transitions. [2021-07-13 19:12:54,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 9409 transitions. [2021-07-13 19:12:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:54,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:54,041 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:54,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:54,249 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:54,249 INFO L82 PathProgramCache]: Analyzing trace with hash 603106924, now seen corresponding path program 56 times [2021-07-13 19:12:54,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:54,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375991788] [2021-07-13 19:12:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:54,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:54,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375991788] [2021-07-13 19:12:54,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375991788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:54,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514894352] [2021-07-13 19:12:54,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:54,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:54,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:54,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:54,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:54,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514894352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:54,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:54,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:12:54,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366659250] [2021-07-13 19:12:54,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:54,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:54,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:54,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:54,384 INFO L87 Difference]: Start difference. First operand 3746 states and 9409 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:54,691 INFO L93 Difference]: Finished difference Result 5163 states and 12313 transitions. [2021-07-13 19:12:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:12:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:54,699 INFO L225 Difference]: With dead ends: 5163 [2021-07-13 19:12:54,699 INFO L226 Difference]: Without dead ends: 5121 [2021-07-13 19:12:54,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:12:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2021-07-13 19:12:54,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3767. [2021-07-13 19:12:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.5132766861391396) internal successors, (9465), 3766 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 9465 transitions. [2021-07-13 19:12:54,752 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 9465 transitions. Word has length 41 [2021-07-13 19:12:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:54,752 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 9465 transitions. [2021-07-13 19:12:54,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 9465 transitions. [2021-07-13 19:12:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:54,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:54,756 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:54,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-07-13 19:12:54,957 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:54,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:54,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2135666033, now seen corresponding path program 57 times [2021-07-13 19:12:54,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:54,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322394458] [2021-07-13 19:12:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:55,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:55,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322394458] [2021-07-13 19:12:55,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322394458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:55,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046687032] [2021-07-13 19:12:55,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:55,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:12:55,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:55,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:55,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046687032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:55,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:55,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:12:55,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388775370] [2021-07-13 19:12:55,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:55,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:55,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:55,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:55,091 INFO L87 Difference]: Start difference. First operand 3767 states and 9465 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:55,209 INFO L93 Difference]: Finished difference Result 4453 states and 10682 transitions. [2021-07-13 19:12:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:55,209 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:55,215 INFO L225 Difference]: With dead ends: 4453 [2021-07-13 19:12:55,215 INFO L226 Difference]: Without dead ends: 4429 [2021-07-13 19:12:55,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-07-13 19:12:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3631. [2021-07-13 19:12:55,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.4991735537190083) internal successors, (9072), 3630 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9072 transitions. [2021-07-13 19:12:55,276 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9072 transitions. Word has length 41 [2021-07-13 19:12:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:55,276 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9072 transitions. [2021-07-13 19:12:55,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9072 transitions. [2021-07-13 19:12:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:55,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:55,280 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:55,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-13 19:12:55,480 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash 757943458, now seen corresponding path program 58 times [2021-07-13 19:12:55,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:55,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790043413] [2021-07-13 19:12:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:55,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:55,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790043413] [2021-07-13 19:12:55,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790043413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:55,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688115155] [2021-07-13 19:12:55,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:55,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:55,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:55,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:55,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:55,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688115155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:55,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:55,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:12:55,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584801127] [2021-07-13 19:12:55,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:55,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:55,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:55,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:55,623 INFO L87 Difference]: Start difference. First operand 3631 states and 9072 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:55,934 INFO L93 Difference]: Finished difference Result 4939 states and 11659 transitions. [2021-07-13 19:12:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:55,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:55,941 INFO L225 Difference]: With dead ends: 4939 [2021-07-13 19:12:55,941 INFO L226 Difference]: Without dead ends: 4885 [2021-07-13 19:12:55,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:12:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-07-13 19:12:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3618. [2021-07-13 19:12:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 2.493779375172795) internal successors, (9020), 3617 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 9020 transitions. [2021-07-13 19:12:55,985 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 9020 transitions. Word has length 41 [2021-07-13 19:12:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:55,985 INFO L482 AbstractCegarLoop]: Abstraction has 3618 states and 9020 transitions. [2021-07-13 19:12:55,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 9020 transitions. [2021-07-13 19:12:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:55,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:55,988 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:56,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:56,189 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash -101998469, now seen corresponding path program 26 times [2021-07-13 19:12:56,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:56,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476272289] [2021-07-13 19:12:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:56,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476272289] [2021-07-13 19:12:56,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476272289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938887522] [2021-07-13 19:12:56,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:56,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:56,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:56,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:56,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:56,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938887522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:56,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:56,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-13 19:12:56,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861281793] [2021-07-13 19:12:56,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:56,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:56,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:56,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:56,331 INFO L87 Difference]: Start difference. First operand 3618 states and 9020 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:56,501 INFO L93 Difference]: Finished difference Result 5763 states and 13661 transitions. [2021-07-13 19:12:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:56,501 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:56,508 INFO L225 Difference]: With dead ends: 5763 [2021-07-13 19:12:56,508 INFO L226 Difference]: Without dead ends: 5763 [2021-07-13 19:12:56,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-07-13 19:12:56,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 3703. [2021-07-13 19:12:56,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.5062128579146408) internal successors, (9278), 3702 states have internal predecessors, (9278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:56,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 9278 transitions. [2021-07-13 19:12:56,561 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 9278 transitions. Word has length 41 [2021-07-13 19:12:56,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:56,561 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 9278 transitions. [2021-07-13 19:12:56,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 9278 transitions. [2021-07-13 19:12:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:56,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:56,565 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:56,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:56,765 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:56,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:56,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1739570925, now seen corresponding path program 27 times [2021-07-13 19:12:56,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:56,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203576221] [2021-07-13 19:12:56,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:56,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:56,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203576221] [2021-07-13 19:12:56,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203576221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:56,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845306333] [2021-07-13 19:12:56,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:56,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:12:56,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:56,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:56,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:56,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845306333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:56,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:56,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:12:56,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251558588] [2021-07-13 19:12:56,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:56,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:56,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:56,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:56,902 INFO L87 Difference]: Start difference. First operand 3703 states and 9278 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:57,094 INFO L93 Difference]: Finished difference Result 5686 states and 13483 transitions. [2021-07-13 19:12:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:57,094 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:57,101 INFO L225 Difference]: With dead ends: 5686 [2021-07-13 19:12:57,101 INFO L226 Difference]: Without dead ends: 5686 [2021-07-13 19:12:57,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-07-13 19:12:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3719. [2021-07-13 19:12:57,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3718 states have (on average 2.5080688542227003) internal successors, (9325), 3718 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 9325 transitions. [2021-07-13 19:12:57,149 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 9325 transitions. Word has length 41 [2021-07-13 19:12:57,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:57,149 INFO L482 AbstractCegarLoop]: Abstraction has 3719 states and 9325 transitions. [2021-07-13 19:12:57,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 9325 transitions. [2021-07-13 19:12:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:57,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:57,152 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:57,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-13 19:12:57,353 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:57,353 INFO L82 PathProgramCache]: Analyzing trace with hash 865401207, now seen corresponding path program 28 times [2021-07-13 19:12:57,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:57,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746290983] [2021-07-13 19:12:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:57,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:57,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746290983] [2021-07-13 19:12:57,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746290983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:57,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885165344] [2021-07-13 19:12:57,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:57,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:57,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:57,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:57,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:57,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885165344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:57,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:57,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:12:57,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610798815] [2021-07-13 19:12:57,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:57,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:57,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:57,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:57,501 INFO L87 Difference]: Start difference. First operand 3719 states and 9325 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:57,718 INFO L93 Difference]: Finished difference Result 4882 states and 11625 transitions. [2021-07-13 19:12:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:57,724 INFO L225 Difference]: With dead ends: 4882 [2021-07-13 19:12:57,724 INFO L226 Difference]: Without dead ends: 4882 [2021-07-13 19:12:57,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-07-13 19:12:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 3551. [2021-07-13 19:12:57,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507887323943662) internal successors, (8903), 3550 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8903 transitions. [2021-07-13 19:12:57,770 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8903 transitions. Word has length 41 [2021-07-13 19:12:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:57,771 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8903 transitions. [2021-07-13 19:12:57,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8903 transitions. [2021-07-13 19:12:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:57,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:57,774 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:57,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-13 19:12:57,975 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1144546135, now seen corresponding path program 59 times [2021-07-13 19:12:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:57,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522532628] [2021-07-13 19:12:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:58,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522532628] [2021-07-13 19:12:58,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522532628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:58,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174898383] [2021-07-13 19:12:58,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:58,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:12:58,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:58,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:58,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:58,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174898383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:58,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:58,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-07-13 19:12:58,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845950807] [2021-07-13 19:12:58,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:12:58,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:58,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:12:58,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:58,133 INFO L87 Difference]: Start difference. First operand 3551 states and 8903 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:58,324 INFO L93 Difference]: Finished difference Result 4193 states and 10086 transitions. [2021-07-13 19:12:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:58,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:58,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:58,329 INFO L225 Difference]: With dead ends: 4193 [2021-07-13 19:12:58,329 INFO L226 Difference]: Without dead ends: 4166 [2021-07-13 19:12:58,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:58,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-07-13 19:12:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3551. [2021-07-13 19:12:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507042253521127) internal successors, (8900), 3550 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8900 transitions. [2021-07-13 19:12:58,373 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8900 transitions. Word has length 41 [2021-07-13 19:12:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:58,373 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8900 transitions. [2021-07-13 19:12:58,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8900 transitions. [2021-07-13 19:12:58,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:58,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:58,377 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:58,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-13 19:12:58,578 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash -245347661, now seen corresponding path program 60 times [2021-07-13 19:12:58,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:58,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910730500] [2021-07-13 19:12:58,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:58,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:58,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910730500] [2021-07-13 19:12:58,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910730500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:58,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546878209] [2021-07-13 19:12:58,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:58,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:12:58,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:58,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:12:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:58,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546878209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:58,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:58,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:12:58,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667123002] [2021-07-13 19:12:58,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:58,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:58,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:58,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:58,722 INFO L87 Difference]: Start difference. First operand 3551 states and 8900 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:58,840 INFO L93 Difference]: Finished difference Result 4381 states and 10397 transitions. [2021-07-13 19:12:58,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:58,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:58,846 INFO L225 Difference]: With dead ends: 4381 [2021-07-13 19:12:58,846 INFO L226 Difference]: Without dead ends: 4363 [2021-07-13 19:12:58,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:58,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-07-13 19:12:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3551. [2021-07-13 19:12:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.5019718309859154) internal successors, (8882), 3550 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8882 transitions. [2021-07-13 19:12:58,888 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8882 transitions. Word has length 41 [2021-07-13 19:12:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:58,888 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8882 transitions. [2021-07-13 19:12:58,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8882 transitions. [2021-07-13 19:12:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:58,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:58,892 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:59,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:59,099 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1693347674, now seen corresponding path program 61 times [2021-07-13 19:12:59,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:59,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320330715] [2021-07-13 19:12:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:59,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:59,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320330715] [2021-07-13 19:12:59,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320330715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:59,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924432872] [2021-07-13 19:12:59,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:59,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:59,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:59,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924432872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:59,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:59,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:12:59,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798051145] [2021-07-13 19:12:59,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:59,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:59,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:59,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:59,268 INFO L87 Difference]: Start difference. First operand 3551 states and 8882 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:59,590 INFO L93 Difference]: Finished difference Result 4355 states and 10366 transitions. [2021-07-13 19:12:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:12:59,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:59,596 INFO L225 Difference]: With dead ends: 4355 [2021-07-13 19:12:59,596 INFO L226 Difference]: Without dead ends: 4156 [2021-07-13 19:12:59,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-07-13 19:12:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3529. [2021-07-13 19:12:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.484126984126984) internal successors, (8764), 3528 states have internal predecessors, (8764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8764 transitions. [2021-07-13 19:12:59,635 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8764 transitions. Word has length 41 [2021-07-13 19:12:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:59,635 INFO L482 AbstractCegarLoop]: Abstraction has 3529 states and 8764 transitions. [2021-07-13 19:12:59,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8764 transitions. [2021-07-13 19:12:59,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:12:59,639 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:59,639 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:59,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-13 19:12:59,848 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:59,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1988083442, now seen corresponding path program 62 times [2021-07-13 19:12:59,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:59,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319278354] [2021-07-13 19:12:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:59,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:59,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:59,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319278354] [2021-07-13 19:12:59,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319278354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:59,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197068840] [2021-07-13 19:12:59,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:59,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:59,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:59,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:12:59,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:59,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197068840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:59,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:59,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:12:59,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582618242] [2021-07-13 19:12:59,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:59,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:59,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:59,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:59,990 INFO L87 Difference]: Start difference. First operand 3529 states and 8764 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:00,228 INFO L93 Difference]: Finished difference Result 4389 states and 10491 transitions. [2021-07-13 19:13:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:00,234 INFO L225 Difference]: With dead ends: 4389 [2021-07-13 19:13:00,234 INFO L226 Difference]: Without dead ends: 4377 [2021-07-13 19:13:00,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-07-13 19:13:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3601. [2021-07-13 19:13:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3600 states have (on average 2.4819444444444443) internal successors, (8935), 3600 states have internal predecessors, (8935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 8935 transitions. [2021-07-13 19:13:00,274 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 8935 transitions. Word has length 41 [2021-07-13 19:13:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:00,274 INFO L482 AbstractCegarLoop]: Abstraction has 3601 states and 8935 transitions. [2021-07-13 19:13:00,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,274 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 8935 transitions. [2021-07-13 19:13:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:00,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:00,277 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:00,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:00,477 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:00,478 INFO L82 PathProgramCache]: Analyzing trace with hash -164966520, now seen corresponding path program 63 times [2021-07-13 19:13:00,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:00,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854781556] [2021-07-13 19:13:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:00,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854781556] [2021-07-13 19:13:00,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854781556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319121041] [2021-07-13 19:13:00,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:00,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:13:00,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:00,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:00,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319121041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:00,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:00,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:13:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403048262] [2021-07-13 19:13:00,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:00,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:00,632 INFO L87 Difference]: Start difference. First operand 3601 states and 8935 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:00,962 INFO L93 Difference]: Finished difference Result 5587 states and 13170 transitions. [2021-07-13 19:13:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:13:00,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:00,970 INFO L225 Difference]: With dead ends: 5587 [2021-07-13 19:13:00,970 INFO L226 Difference]: Without dead ends: 5533 [2021-07-13 19:13:00,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:00,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-07-13 19:13:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 3793. [2021-07-13 19:13:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.4897151898734178) internal successors, (9441), 3792 states have internal predecessors, (9441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9441 transitions. [2021-07-13 19:13:01,020 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9441 transitions. Word has length 41 [2021-07-13 19:13:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:01,021 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9441 transitions. [2021-07-13 19:13:01,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9441 transitions. [2021-07-13 19:13:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:01,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:01,024 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:01,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-07-13 19:13:01,224 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:01,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:01,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1367592589, now seen corresponding path program 64 times [2021-07-13 19:13:01,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:01,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314481099] [2021-07-13 19:13:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:01,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:01,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314481099] [2021-07-13 19:13:01,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314481099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774262336] [2021-07-13 19:13:01,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:01,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:01,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:01,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:01,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:01,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774262336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:01,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:13:01,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576181320] [2021-07-13 19:13:01,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:01,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:01,361 INFO L87 Difference]: Start difference. First operand 3793 states and 9441 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:01,494 INFO L93 Difference]: Finished difference Result 4607 states and 10909 transitions. [2021-07-13 19:13:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:13:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:01,500 INFO L225 Difference]: With dead ends: 4607 [2021-07-13 19:13:01,500 INFO L226 Difference]: Without dead ends: 4583 [2021-07-13 19:13:01,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-07-13 19:13:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3793. [2021-07-13 19:13:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.485495780590717) internal successors, (9425), 3792 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9425 transitions. [2021-07-13 19:13:01,547 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9425 transitions. Word has length 41 [2021-07-13 19:13:01,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:01,547 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9425 transitions. [2021-07-13 19:13:01,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:01,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9425 transitions. [2021-07-13 19:13:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:01,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:01,551 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:01,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-13 19:13:01,752 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:01,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:01,752 INFO L82 PathProgramCache]: Analyzing trace with hash -10129986, now seen corresponding path program 65 times [2021-07-13 19:13:01,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:01,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973491116] [2021-07-13 19:13:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:01,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:01,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973491116] [2021-07-13 19:13:01,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973491116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834549557] [2021-07-13 19:13:01,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:01,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:13:01,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:01,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:01,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:01,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834549557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:01,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:13:01,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845027451] [2021-07-13 19:13:01,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:01,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:01,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:01,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:01,896 INFO L87 Difference]: Start difference. First operand 3793 states and 9425 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:02,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:02,403 INFO L93 Difference]: Finished difference Result 7022 states and 16378 transitions. [2021-07-13 19:13:02,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:13:02,403 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:02,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:02,412 INFO L225 Difference]: With dead ends: 7022 [2021-07-13 19:13:02,412 INFO L226 Difference]: Without dead ends: 6908 [2021-07-13 19:13:02,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:13:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2021-07-13 19:13:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 3954. [2021-07-13 19:13:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.489501644320769) internal successors, (9841), 3953 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9841 transitions. [2021-07-13 19:13:02,472 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9841 transitions. Word has length 41 [2021-07-13 19:13:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:02,472 INFO L482 AbstractCegarLoop]: Abstraction has 3954 states and 9841 transitions. [2021-07-13 19:13:02,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:02,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9841 transitions. [2021-07-13 19:13:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:02,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:02,476 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:02,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:02,685 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:02,685 INFO L82 PathProgramCache]: Analyzing trace with hash 376472691, now seen corresponding path program 66 times [2021-07-13 19:13:02,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:02,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301009428] [2021-07-13 19:13:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:02,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:02,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301009428] [2021-07-13 19:13:02,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301009428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:02,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546861865] [2021-07-13 19:13:02,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:02,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:13:02,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:02,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:02,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:02,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546861865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:02,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:02,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:13:02,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004991898] [2021-07-13 19:13:02,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:02,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:02,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:02,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:02,821 INFO L87 Difference]: Start difference. First operand 3954 states and 9841 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:02,993 INFO L93 Difference]: Finished difference Result 4805 states and 11375 transitions. [2021-07-13 19:13:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:02,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:03,000 INFO L225 Difference]: With dead ends: 4805 [2021-07-13 19:13:03,001 INFO L226 Difference]: Without dead ends: 4772 [2021-07-13 19:13:03,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-07-13 19:13:03,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 3796. [2021-07-13 19:13:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 2.477470355731225) internal successors, (9402), 3795 states have internal predecessors, (9402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 9402 transitions. [2021-07-13 19:13:03,051 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 9402 transitions. Word has length 41 [2021-07-13 19:13:03,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:03,051 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 9402 transitions. [2021-07-13 19:13:03,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:03,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 9402 transitions. [2021-07-13 19:13:03,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:03,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:03,054 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:03,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2021-07-13 19:13:03,255 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:03,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:03,255 INFO L82 PathProgramCache]: Analyzing trace with hash -69821496, now seen corresponding path program 67 times [2021-07-13 19:13:03,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:03,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481088347] [2021-07-13 19:13:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:03,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:03,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:03,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481088347] [2021-07-13 19:13:03,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481088347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:03,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112699846] [2021-07-13 19:13:03,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:03,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:03,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:03,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112699846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:03,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:03,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:13:03,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944619658] [2021-07-13 19:13:03,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:03,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:03,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:03,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:03,407 INFO L87 Difference]: Start difference. First operand 3796 states and 9402 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:03,785 INFO L93 Difference]: Finished difference Result 5143 states and 11987 transitions. [2021-07-13 19:13:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:13:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:03,792 INFO L225 Difference]: With dead ends: 5143 [2021-07-13 19:13:03,792 INFO L226 Difference]: Without dead ends: 4987 [2021-07-13 19:13:03,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:03,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-07-13 19:13:03,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3332. [2021-07-13 19:13:03,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.4377063944761335) internal successors, (8120), 3331 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:03,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 8120 transitions. [2021-07-13 19:13:03,838 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 8120 transitions. Word has length 41 [2021-07-13 19:13:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:03,838 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 8120 transitions. [2021-07-13 19:13:03,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 8120 transitions. [2021-07-13 19:13:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:03,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:03,841 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:04,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-07-13 19:13:04,042 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash -307883013, now seen corresponding path program 29 times [2021-07-13 19:13:04,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:04,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592596059] [2021-07-13 19:13:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:04,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:04,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592596059] [2021-07-13 19:13:04,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592596059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:04,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872588459] [2021-07-13 19:13:04,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:04,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:13:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:04,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:04,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872588459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:04,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:04,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-07-13 19:13:04,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139264952] [2021-07-13 19:13:04,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:04,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:04,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:04,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:04,177 INFO L87 Difference]: Start difference. First operand 3332 states and 8120 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:04,320 INFO L93 Difference]: Finished difference Result 4368 states and 10283 transitions. [2021-07-13 19:13:04,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:04,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:04,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:04,325 INFO L225 Difference]: With dead ends: 4368 [2021-07-13 19:13:04,325 INFO L226 Difference]: Without dead ends: 4354 [2021-07-13 19:13:04,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:04,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-07-13 19:13:04,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3443. [2021-07-13 19:13:04,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.4468332364904124) internal successors, (8422), 3442 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8422 transitions. [2021-07-13 19:13:04,364 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8422 transitions. Word has length 41 [2021-07-13 19:13:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:04,364 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 8422 transitions. [2021-07-13 19:13:04,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8422 transitions. [2021-07-13 19:13:04,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:04,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:04,367 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:04,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-07-13 19:13:04,567 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:04,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:04,567 INFO L82 PathProgramCache]: Analyzing trace with hash -929763423, now seen corresponding path program 30 times [2021-07-13 19:13:04,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:04,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691603836] [2021-07-13 19:13:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:04,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:04,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691603836] [2021-07-13 19:13:04,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691603836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:04,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66443769] [2021-07-13 19:13:04,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:04,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:13:04,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:04,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:04,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66443769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:04,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:04,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-13 19:13:04,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798323713] [2021-07-13 19:13:04,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:04,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:04,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:04,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:04,710 INFO L87 Difference]: Start difference. First operand 3443 states and 8422 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:04,921 INFO L93 Difference]: Finished difference Result 4338 states and 10163 transitions. [2021-07-13 19:13:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:04,921 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:04,926 INFO L225 Difference]: With dead ends: 4338 [2021-07-13 19:13:04,926 INFO L226 Difference]: Without dead ends: 4338 [2021-07-13 19:13:04,926 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-07-13 19:13:04,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3179. [2021-07-13 19:13:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.4389553178099432) internal successors, (7751), 3178 states have internal predecessors, (7751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 7751 transitions. [2021-07-13 19:13:04,962 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 7751 transitions. Word has length 41 [2021-07-13 19:13:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:04,962 INFO L482 AbstractCegarLoop]: Abstraction has 3179 states and 7751 transitions. [2021-07-13 19:13:04,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 7751 transitions. [2021-07-13 19:13:04,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:04,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:04,965 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:05,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:05,180 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:05,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1823751373, now seen corresponding path program 68 times [2021-07-13 19:13:05,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:05,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618816733] [2021-07-13 19:13:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:05,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:05,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618816733] [2021-07-13 19:13:05,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618816733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129013972] [2021-07-13 19:13:05,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:05,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:05,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:05,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:05,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:05,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129013972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:05,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:13:05,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994224144] [2021-07-13 19:13:05,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:05,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:05,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:05,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:05,343 INFO L87 Difference]: Start difference. First operand 3179 states and 7751 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:05,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:05,529 INFO L93 Difference]: Finished difference Result 3775 states and 8829 transitions. [2021-07-13 19:13:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:05,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:05,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:05,534 INFO L225 Difference]: With dead ends: 3775 [2021-07-13 19:13:05,534 INFO L226 Difference]: Without dead ends: 3739 [2021-07-13 19:13:05,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-07-13 19:13:05,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3188. [2021-07-13 19:13:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 2.4339504235958582) internal successors, (7757), 3187 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 7757 transitions. [2021-07-13 19:13:05,576 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 7757 transitions. Word has length 41 [2021-07-13 19:13:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:05,576 INFO L482 AbstractCegarLoop]: Abstraction has 3188 states and 7757 transitions. [2021-07-13 19:13:05,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:05,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 7757 transitions. [2021-07-13 19:13:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:05,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:05,579 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:05,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:05,779 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:05,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:05,779 INFO L82 PathProgramCache]: Analyzing trace with hash 370314101, now seen corresponding path program 69 times [2021-07-13 19:13:05,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:05,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322199468] [2021-07-13 19:13:05,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:05,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:05,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322199468] [2021-07-13 19:13:05,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322199468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985374117] [2021-07-13 19:13:05,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:05,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:13:05,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:05,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:05,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:05,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985374117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:05,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:13:05,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900670260] [2021-07-13 19:13:05,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:05,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:05,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:05,939 INFO L87 Difference]: Start difference. First operand 3188 states and 7757 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:06,179 INFO L93 Difference]: Finished difference Result 4138 states and 9762 transitions. [2021-07-13 19:13:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:06,185 INFO L225 Difference]: With dead ends: 4138 [2021-07-13 19:13:06,185 INFO L226 Difference]: Without dead ends: 4138 [2021-07-13 19:13:06,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-07-13 19:13:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3170. [2021-07-13 19:13:06,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3169 states have (on average 2.454717576522562) internal successors, (7779), 3169 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 7779 transitions. [2021-07-13 19:13:06,223 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 7779 transitions. Word has length 41 [2021-07-13 19:13:06,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:06,223 INFO L482 AbstractCegarLoop]: Abstraction has 3170 states and 7779 transitions. [2021-07-13 19:13:06,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 7779 transitions. [2021-07-13 19:13:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:06,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:06,226 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:06,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-07-13 19:13:06,426 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:06,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1062684898, now seen corresponding path program 31 times [2021-07-13 19:13:06,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:06,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140630953] [2021-07-13 19:13:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:06,498 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:06,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:06,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140630953] [2021-07-13 19:13:06,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140630953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:06,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133853079] [2021-07-13 19:13:06,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:06,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:06,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133853079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:06,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:06,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:13:06,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619649567] [2021-07-13 19:13:06,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:06,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:06,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:06,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:06,576 INFO L87 Difference]: Start difference. First operand 3170 states and 7779 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:06,894 INFO L93 Difference]: Finished difference Result 4257 states and 9988 transitions. [2021-07-13 19:13:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:13:06,895 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:06,900 INFO L225 Difference]: With dead ends: 4257 [2021-07-13 19:13:06,900 INFO L226 Difference]: Without dead ends: 4227 [2021-07-13 19:13:06,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-07-13 19:13:06,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 3157. [2021-07-13 19:13:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.459442332065906) internal successors, (7762), 3156 states have internal predecessors, (7762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7762 transitions. [2021-07-13 19:13:06,943 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7762 transitions. Word has length 41 [2021-07-13 19:13:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:06,943 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7762 transitions. [2021-07-13 19:13:06,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7762 transitions. [2021-07-13 19:13:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:06,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:06,946 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:07,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:07,147 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash 900632802, now seen corresponding path program 70 times [2021-07-13 19:13:07,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:07,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174267187] [2021-07-13 19:13:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:07,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:07,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174267187] [2021-07-13 19:13:07,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174267187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:07,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526622817] [2021-07-13 19:13:07,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:07,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:07,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:07,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:07,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:07,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526622817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:07,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:07,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-13 19:13:07,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172024846] [2021-07-13 19:13:07,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:07,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:07,390 INFO L87 Difference]: Start difference. First operand 3157 states and 7762 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:07,706 INFO L93 Difference]: Finished difference Result 3218 states and 7858 transitions. [2021-07-13 19:13:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:07,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:07,710 INFO L225 Difference]: With dead ends: 3218 [2021-07-13 19:13:07,710 INFO L226 Difference]: Without dead ends: 3174 [2021-07-13 19:13:07,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:07,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-07-13 19:13:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3157. [2021-07-13 19:13:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.45659062103929) internal successors, (7753), 3156 states have internal predecessors, (7753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7753 transitions. [2021-07-13 19:13:07,748 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7753 transitions. Word has length 41 [2021-07-13 19:13:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:07,748 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7753 transitions. [2021-07-13 19:13:07,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7753 transitions. [2021-07-13 19:13:07,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:07,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:07,751 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:07,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-07-13 19:13:07,951 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:07,951 INFO L82 PathProgramCache]: Analyzing trace with hash -514678441, now seen corresponding path program 71 times [2021-07-13 19:13:07,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:07,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031751244] [2021-07-13 19:13:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:08,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:08,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031751244] [2021-07-13 19:13:08,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031751244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408786924] [2021-07-13 19:13:08,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:08,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:13:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:08,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:08,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408786924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:08,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 12 [2021-07-13 19:13:08,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228869575] [2021-07-13 19:13:08,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:08,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:08,106 INFO L87 Difference]: Start difference. First operand 3157 states and 7753 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:08,306 INFO L93 Difference]: Finished difference Result 4264 states and 10096 transitions. [2021-07-13 19:13:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:08,306 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:08,312 INFO L225 Difference]: With dead ends: 4264 [2021-07-13 19:13:08,312 INFO L226 Difference]: Without dead ends: 4264 [2021-07-13 19:13:08,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:13:08,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-07-13 19:13:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3336. [2021-07-13 19:13:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 2.489055472263868) internal successors, (8301), 3335 states have internal predecessors, (8301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:08,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8301 transitions. [2021-07-13 19:13:08,355 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8301 transitions. Word has length 41 [2021-07-13 19:13:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:08,355 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 8301 transitions. [2021-07-13 19:13:08,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8301 transitions. [2021-07-13 19:13:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:08,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:08,359 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:08,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:08,559 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1038909258, now seen corresponding path program 32 times [2021-07-13 19:13:08,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:08,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659112897] [2021-07-13 19:13:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:08,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659112897] [2021-07-13 19:13:08,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659112897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416320658] [2021-07-13 19:13:08,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:08,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:08,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:08,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:08,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:08,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416320658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:08,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:13:08,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574478529] [2021-07-13 19:13:08,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:08,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:08,723 INFO L87 Difference]: Start difference. First operand 3336 states and 8301 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:08,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:09,000 INFO L93 Difference]: Finished difference Result 4243 states and 10191 transitions. [2021-07-13 19:13:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:09,005 INFO L225 Difference]: With dead ends: 4243 [2021-07-13 19:13:09,005 INFO L226 Difference]: Without dead ends: 4243 [2021-07-13 19:13:09,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:13:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-07-13 19:13:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3327. [2021-07-13 19:13:09,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.495189416716777) internal successors, (8299), 3326 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8299 transitions. [2021-07-13 19:13:09,054 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8299 transitions. Word has length 41 [2021-07-13 19:13:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:09,054 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8299 transitions. [2021-07-13 19:13:09,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8299 transitions. [2021-07-13 19:13:09,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:09,057 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:09,057 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:09,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:09,257 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:09,258 INFO L82 PathProgramCache]: Analyzing trace with hash 862018314, now seen corresponding path program 72 times [2021-07-13 19:13:09,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:09,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016423950] [2021-07-13 19:13:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:09,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:09,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016423950] [2021-07-13 19:13:09,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016423950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:09,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148131428] [2021-07-13 19:13:09,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:09,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:13:09,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:09,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:09,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:09,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148131428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:09,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:09,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:13:09,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503578719] [2021-07-13 19:13:09,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:09,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:09,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:09,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:09,466 INFO L87 Difference]: Start difference. First operand 3327 states and 8299 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:09,774 INFO L93 Difference]: Finished difference Result 3397 states and 8404 transitions. [2021-07-13 19:13:09,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:09,775 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:09,779 INFO L225 Difference]: With dead ends: 3397 [2021-07-13 19:13:09,779 INFO L226 Difference]: Without dead ends: 3365 [2021-07-13 19:13:09,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-07-13 19:13:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3327. [2021-07-13 19:13:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.493385447985568) internal successors, (8293), 3326 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8293 transitions. [2021-07-13 19:13:09,814 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8293 transitions. Word has length 41 [2021-07-13 19:13:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:09,814 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8293 transitions. [2021-07-13 19:13:09,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8293 transitions. [2021-07-13 19:13:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:09,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:09,817 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:10,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:10,017 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:10,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1554389111, now seen corresponding path program 33 times [2021-07-13 19:13:10,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:10,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234083602] [2021-07-13 19:13:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:10,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:10,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234083602] [2021-07-13 19:13:10,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234083602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:10,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141512611] [2021-07-13 19:13:10,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:10,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:13:10,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:10,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:10,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:10,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141512611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:10,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:10,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:13:10,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325263206] [2021-07-13 19:13:10,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:10,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:10,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:10,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:10,169 INFO L87 Difference]: Start difference. First operand 3327 states and 8293 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:10,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:10,319 INFO L93 Difference]: Finished difference Result 3937 states and 9522 transitions. [2021-07-13 19:13:10,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:10,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:10,325 INFO L225 Difference]: With dead ends: 3937 [2021-07-13 19:13:10,325 INFO L226 Difference]: Without dead ends: 3909 [2021-07-13 19:13:10,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-07-13 19:13:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3225. [2021-07-13 19:13:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 2.507754342431762) internal successors, (8085), 3224 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 8085 transitions. [2021-07-13 19:13:10,361 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 8085 transitions. Word has length 41 [2021-07-13 19:13:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:10,361 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 8085 transitions. [2021-07-13 19:13:10,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 8085 transitions. [2021-07-13 19:13:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:10,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:10,364 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:10,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:10,564 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:10,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash -692902219, now seen corresponding path program 73 times [2021-07-13 19:13:10,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:10,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646990008] [2021-07-13 19:13:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:10,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646990008] [2021-07-13 19:13:10,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646990008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:10,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503298191] [2021-07-13 19:13:10,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:10,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:10,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503298191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:10,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:10,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:13:10,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012085793] [2021-07-13 19:13:10,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:10,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:10,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:10,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:10,703 INFO L87 Difference]: Start difference. First operand 3225 states and 8085 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:10,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:10,838 INFO L93 Difference]: Finished difference Result 4305 states and 10371 transitions. [2021-07-13 19:13:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:13:10,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:10,843 INFO L225 Difference]: With dead ends: 4305 [2021-07-13 19:13:10,843 INFO L226 Difference]: Without dead ends: 4305 [2021-07-13 19:13:10,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:10,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-07-13 19:13:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3427. [2021-07-13 19:13:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 2.538237011091652) internal successors, (8696), 3426 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 8696 transitions. [2021-07-13 19:13:10,886 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 8696 transitions. Word has length 41 [2021-07-13 19:13:10,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:10,886 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 8696 transitions. [2021-07-13 19:13:10,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:10,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 8696 transitions. [2021-07-13 19:13:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:10,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:10,889 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:11,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-13 19:13:11,089 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:11,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1463737886, now seen corresponding path program 34 times [2021-07-13 19:13:11,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:11,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888318539] [2021-07-13 19:13:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:11,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:11,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888318539] [2021-07-13 19:13:11,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888318539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:11,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588116779] [2021-07-13 19:13:11,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:11,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:11,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588116779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:11,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:11,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:13:11,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594421105] [2021-07-13 19:13:11,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:11,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:11,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:11,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:11,222 INFO L87 Difference]: Start difference. First operand 3427 states and 8696 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:11,492 INFO L93 Difference]: Finished difference Result 4051 states and 9977 transitions. [2021-07-13 19:13:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:13:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:11,497 INFO L225 Difference]: With dead ends: 4051 [2021-07-13 19:13:11,497 INFO L226 Difference]: Without dead ends: 4047 [2021-07-13 19:13:11,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 101.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-07-13 19:13:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3315. [2021-07-13 19:13:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.55944477972239) internal successors, (8482), 3314 states have internal predecessors, (8482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8482 transitions. [2021-07-13 19:13:11,538 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8482 transitions. Word has length 41 [2021-07-13 19:13:11,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:11,538 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8482 transitions. [2021-07-13 19:13:11,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8482 transitions. [2021-07-13 19:13:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:11,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:11,541 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:11,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:11,741 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:11,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1197933026, now seen corresponding path program 74 times [2021-07-13 19:13:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:11,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436570044] [2021-07-13 19:13:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:11,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:11,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436570044] [2021-07-13 19:13:11,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436570044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:11,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902267310] [2021-07-13 19:13:11,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:11,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:11,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:13:11,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:11,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:13:11,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:13:11,879 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-07-13 19:13:11,879 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:13:11,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:13:11,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-07-13 19:13:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:11,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902267310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:11,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:11,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:13:11,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652410665] [2021-07-13 19:13:11,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:13:11,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:11,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:13:11,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:13:11,885 INFO L87 Difference]: Start difference. First operand 3315 states and 8482 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:11,987 INFO L93 Difference]: Finished difference Result 3335 states and 8513 transitions. [2021-07-13 19:13:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:13:11,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:11,992 INFO L225 Difference]: With dead ends: 3335 [2021-07-13 19:13:11,992 INFO L226 Difference]: Without dead ends: 3315 [2021-07-13 19:13:11,992 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:13:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-07-13 19:13:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3315. [2021-07-13 19:13:12,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.5585395292697646) internal successors, (8479), 3314 states have internal predecessors, (8479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:12,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8479 transitions. [2021-07-13 19:13:12,028 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8479 transitions. Word has length 41 [2021-07-13 19:13:12,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:12,028 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8479 transitions. [2021-07-13 19:13:12,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:12,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8479 transitions. [2021-07-13 19:13:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:12,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:12,030 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:12,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-07-13 19:13:12,231 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:12,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:12,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1045836265, now seen corresponding path program 75 times [2021-07-13 19:13:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:12,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677926622] [2021-07-13 19:13:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:12,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:12,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677926622] [2021-07-13 19:13:12,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677926622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:12,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858493951] [2021-07-13 19:13:12,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:12,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:13:12,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:12,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:12,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858493951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:12,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:12,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:13:12,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082692289] [2021-07-13 19:13:12,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:13:12,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:12,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:13:12,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:13:12,355 INFO L87 Difference]: Start difference. First operand 3315 states and 8479 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:12,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:12,464 INFO L93 Difference]: Finished difference Result 4538 states and 11042 transitions. [2021-07-13 19:13:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:13:12,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:12,470 INFO L225 Difference]: With dead ends: 4538 [2021-07-13 19:13:12,470 INFO L226 Difference]: Without dead ends: 4538 [2021-07-13 19:13:12,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:12,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-07-13 19:13:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 3547. [2021-07-13 19:13:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 2.586576424139876) internal successors, (9172), 3546 states have internal predecessors, (9172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9172 transitions. [2021-07-13 19:13:12,526 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9172 transitions. Word has length 41 [2021-07-13 19:13:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:12,526 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9172 transitions. [2021-07-13 19:13:12,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:12,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9172 transitions. [2021-07-13 19:13:12,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:12,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:12,528 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:12,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:12,731 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:12,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:12,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1283897782, now seen corresponding path program 35 times [2021-07-13 19:13:12,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:12,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18036924] [2021-07-13 19:13:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:12,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:12,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18036924] [2021-07-13 19:13:12,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18036924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:12,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699016331] [2021-07-13 19:13:12,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:12,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:13:12,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:12,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:12,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:12,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699016331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:12,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:12,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:13:12,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066622851] [2021-07-13 19:13:12,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:13:12,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:12,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:13:12,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:13:12,867 INFO L87 Difference]: Start difference. First operand 3547 states and 9172 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:13,091 INFO L93 Difference]: Finished difference Result 4055 states and 10165 transitions. [2021-07-13 19:13:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:13,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:13,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:13,096 INFO L225 Difference]: With dead ends: 4055 [2021-07-13 19:13:13,096 INFO L226 Difference]: Without dead ends: 4047 [2021-07-13 19:13:13,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-07-13 19:13:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3606. [2021-07-13 19:13:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.582246879334258) internal successors, (9309), 3605 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9309 transitions. [2021-07-13 19:13:13,139 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9309 transitions. Word has length 41 [2021-07-13 19:13:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:13,139 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9309 transitions. [2021-07-13 19:13:13,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9309 transitions. [2021-07-13 19:13:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:13,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:13,142 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:13,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-07-13 19:13:13,343 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:13,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:13,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1457372657, now seen corresponding path program 76 times [2021-07-13 19:13:13,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:13,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363214841] [2021-07-13 19:13:13,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:13,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363214841] [2021-07-13 19:13:13,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363214841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811345474] [2021-07-13 19:13:13,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:13,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:13,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:13,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:13,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:13,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811345474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:13,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:13,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:13:13,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840140814] [2021-07-13 19:13:13,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:13:13,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:13,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:13:13,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:13:13,475 INFO L87 Difference]: Start difference. First operand 3606 states and 9309 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:13,582 INFO L93 Difference]: Finished difference Result 4522 states and 10995 transitions. [2021-07-13 19:13:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:13:13,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:13,587 INFO L225 Difference]: With dead ends: 4522 [2021-07-13 19:13:13,587 INFO L226 Difference]: Without dead ends: 4519 [2021-07-13 19:13:13,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2021-07-13 19:13:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 3605. [2021-07-13 19:13:13,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3604 states have (on average 2.5812985571587124) internal successors, (9303), 3604 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9303 transitions. [2021-07-13 19:13:13,630 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9303 transitions. Word has length 41 [2021-07-13 19:13:13,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:13,630 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9303 transitions. [2021-07-13 19:13:13,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9303 transitions. [2021-07-13 19:13:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:13,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:13,633 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:13,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:13,837 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1664435223, now seen corresponding path program 77 times [2021-07-13 19:13:13,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:13,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670867485] [2021-07-13 19:13:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:13,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:13,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670867485] [2021-07-13 19:13:13,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670867485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:13,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368577430] [2021-07-13 19:13:13,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:13,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:13:13,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:13,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:13,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:13,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368577430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:13,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:13,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-07-13 19:13:13,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3795119] [2021-07-13 19:13:13,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:13,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:13,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:13,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:13,984 INFO L87 Difference]: Start difference. First operand 3605 states and 9303 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:14,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:14,102 INFO L93 Difference]: Finished difference Result 4564 states and 11216 transitions. [2021-07-13 19:13:14,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:14,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:14,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:14,108 INFO L225 Difference]: With dead ends: 4564 [2021-07-13 19:13:14,108 INFO L226 Difference]: Without dead ends: 4552 [2021-07-13 19:13:14,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4552 states. [2021-07-13 19:13:14,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4552 to 3605. [2021-07-13 19:13:14,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3604 states have (on average 2.5804661487236404) internal successors, (9300), 3604 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9300 transitions. [2021-07-13 19:13:14,156 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9300 transitions. Word has length 41 [2021-07-13 19:13:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:14,156 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9300 transitions. [2021-07-13 19:13:14,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:14,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9300 transitions. [2021-07-13 19:13:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:14,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:14,159 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:14,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:14,360 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:14,360 INFO L82 PathProgramCache]: Analyzing trace with hash 216435210, now seen corresponding path program 78 times [2021-07-13 19:13:14,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:14,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146033759] [2021-07-13 19:13:14,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:14,412 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:14,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:14,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146033759] [2021-07-13 19:13:14,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146033759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:14,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429098054] [2021-07-13 19:13:14,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:14,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:13:14,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:14,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:14,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:14,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429098054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:14,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:14,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-13 19:13:14,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814736073] [2021-07-13 19:13:14,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:13:14,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:14,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:13:14,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:13:14,525 INFO L87 Difference]: Start difference. First operand 3605 states and 9300 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:14,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:14,838 INFO L93 Difference]: Finished difference Result 3907 states and 9798 transitions. [2021-07-13 19:13:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:14,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:14,843 INFO L225 Difference]: With dead ends: 3907 [2021-07-13 19:13:14,843 INFO L226 Difference]: Without dead ends: 3810 [2021-07-13 19:13:14,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:14,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-07-13 19:13:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3511. [2021-07-13 19:13:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 3510 states have (on average 2.5866096866096866) internal successors, (9079), 3510 states have internal predecessors, (9079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 9079 transitions. [2021-07-13 19:13:14,884 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 9079 transitions. Word has length 41 [2021-07-13 19:13:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:14,884 INFO L482 AbstractCegarLoop]: Abstraction has 3511 states and 9079 transitions. [2021-07-13 19:13:14,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 9079 transitions. [2021-07-13 19:13:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:14,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:14,887 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:15,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-07-13 19:13:15,088 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:15,088 INFO L82 PathProgramCache]: Analyzing trace with hash -397100970, now seen corresponding path program 79 times [2021-07-13 19:13:15,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:15,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344950609] [2021-07-13 19:13:15,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:15,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:15,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344950609] [2021-07-13 19:13:15,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344950609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234874386] [2021-07-13 19:13:15,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:15,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:15,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:15,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234874386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:15,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:13:15,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146314397] [2021-07-13 19:13:15,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:13:15,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:13:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:13:15,227 INFO L87 Difference]: Start difference. First operand 3511 states and 9079 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:15,422 INFO L93 Difference]: Finished difference Result 3950 states and 9921 transitions. [2021-07-13 19:13:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:15,422 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:15,427 INFO L225 Difference]: With dead ends: 3950 [2021-07-13 19:13:15,427 INFO L226 Difference]: Without dead ends: 3938 [2021-07-13 19:13:15,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-07-13 19:13:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3513. [2021-07-13 19:13:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.5865603644646926) internal successors, (9084), 3512 states have internal predecessors, (9084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9084 transitions. [2021-07-13 19:13:15,470 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9084 transitions. Word has length 41 [2021-07-13 19:13:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:15,470 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9084 transitions. [2021-07-13 19:13:15,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9084 transitions. [2021-07-13 19:13:15,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:15,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:15,473 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:15,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-07-13 19:13:15,673 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:15,674 INFO L82 PathProgramCache]: Analyzing trace with hash -554400457, now seen corresponding path program 36 times [2021-07-13 19:13:15,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:15,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125472344] [2021-07-13 19:13:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:15,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:15,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125472344] [2021-07-13 19:13:15,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125472344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412447446] [2021-07-13 19:13:15,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:15,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:13:15,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:15,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:15,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:15,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412447446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:15,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 13 [2021-07-13 19:13:15,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786811797] [2021-07-13 19:13:15,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:13:15,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:15,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:13:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:15,818 INFO L87 Difference]: Start difference. First operand 3513 states and 9084 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:16,003 INFO L93 Difference]: Finished difference Result 4278 states and 10675 transitions. [2021-07-13 19:13:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:16,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:16,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:16,008 INFO L225 Difference]: With dead ends: 4278 [2021-07-13 19:13:16,008 INFO L226 Difference]: Without dead ends: 4268 [2021-07-13 19:13:16,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-07-13 19:13:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3755. [2021-07-13 19:13:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 2.587906233351092) internal successors, (9715), 3754 states have internal predecessors, (9715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 9715 transitions. [2021-07-13 19:13:16,053 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 9715 transitions. Word has length 41 [2021-07-13 19:13:16,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:16,053 INFO L482 AbstractCegarLoop]: Abstraction has 3755 states and 9715 transitions. [2021-07-13 19:13:16,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:16,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 9715 transitions. [2021-07-13 19:13:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:16,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:16,056 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:16,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:16,256 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1744816364, now seen corresponding path program 80 times [2021-07-13 19:13:16,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:16,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901108326] [2021-07-13 19:13:16,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:16,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:16,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901108326] [2021-07-13 19:13:16,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901108326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:16,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365574136] [2021-07-13 19:13:16,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:16,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:16,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:16,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:13:16,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:16,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:13:16,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:13:16,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:13:16,402 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:13:16,402 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:13:16,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:13:16,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:13:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:16,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365574136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:16,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:16,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:13:16,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535838574] [2021-07-13 19:13:16,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:16,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:16,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:16,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:16,409 INFO L87 Difference]: Start difference. First operand 3755 states and 9715 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:16,760 INFO L93 Difference]: Finished difference Result 5015 states and 12296 transitions. [2021-07-13 19:13:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:13:16,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:16,767 INFO L225 Difference]: With dead ends: 5015 [2021-07-13 19:13:16,767 INFO L226 Difference]: Without dead ends: 4961 [2021-07-13 19:13:16,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-07-13 19:13:16,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3838. [2021-07-13 19:13:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.5882199635131613) internal successors, (9931), 3837 states have internal predecessors, (9931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:16,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 9931 transitions. [2021-07-13 19:13:16,818 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 9931 transitions. Word has length 41 [2021-07-13 19:13:16,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:16,819 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 9931 transitions. [2021-07-13 19:13:16,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:16,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 9931 transitions. [2021-07-13 19:13:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:16,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:16,821 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:17,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-07-13 19:13:17,022 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:17,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:17,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1017591823, now seen corresponding path program 81 times [2021-07-13 19:13:17,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:17,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943090867] [2021-07-13 19:13:17,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:17,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:17,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943090867] [2021-07-13 19:13:17,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943090867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:17,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760600326] [2021-07-13 19:13:17,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:17,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:13:17,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:17,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:17,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:17,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760600326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:17,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:17,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:13:17,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618753492] [2021-07-13 19:13:17,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:17,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:17,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:17,165 INFO L87 Difference]: Start difference. First operand 3838 states and 9931 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:17,266 INFO L93 Difference]: Finished difference Result 4722 states and 11676 transitions. [2021-07-13 19:13:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:13:17,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:17,271 INFO L225 Difference]: With dead ends: 4722 [2021-07-13 19:13:17,272 INFO L226 Difference]: Without dead ends: 4704 [2021-07-13 19:13:17,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-07-13 19:13:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3928. [2021-07-13 19:13:17,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 2.6002037178507766) internal successors, (10211), 3927 states have internal predecessors, (10211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10211 transitions. [2021-07-13 19:13:17,318 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10211 transitions. Word has length 41 [2021-07-13 19:13:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:17,318 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10211 transitions. [2021-07-13 19:13:17,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10211 transitions. [2021-07-13 19:13:17,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:17,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:17,321 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:17,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:17,522 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:17,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:17,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1899652898, now seen corresponding path program 82 times [2021-07-13 19:13:17,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:17,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947993944] [2021-07-13 19:13:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:17,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:17,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947993944] [2021-07-13 19:13:17,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947993944] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:17,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98872144] [2021-07-13 19:13:17,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:17,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:17,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:17,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 19:13:17,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:17,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:13:17,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:13:17,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:13:17,704 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:13:17,704 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:13:17,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:13:17,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:13:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:17,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98872144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:17,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:17,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:13:17,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872225504] [2021-07-13 19:13:17,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:13:17,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:17,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:13:17,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:17,713 INFO L87 Difference]: Start difference. First operand 3928 states and 10211 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:18,337 INFO L93 Difference]: Finished difference Result 7135 states and 16888 transitions. [2021-07-13 19:13:18,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:13:18,337 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:18,349 INFO L225 Difference]: With dead ends: 7135 [2021-07-13 19:13:18,349 INFO L226 Difference]: Without dead ends: 6955 [2021-07-13 19:13:18,349 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:13:18,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2021-07-13 19:13:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 4145. [2021-07-13 19:13:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 2.5921814671814674) internal successors, (10742), 4144 states have internal predecessors, (10742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:18,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10742 transitions. [2021-07-13 19:13:18,416 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10742 transitions. Word has length 41 [2021-07-13 19:13:18,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:18,417 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10742 transitions. [2021-07-13 19:13:18,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:18,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10742 transitions. [2021-07-13 19:13:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:18,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:18,420 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:18,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-07-13 19:13:18,620 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:18,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:18,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2008711721, now seen corresponding path program 83 times [2021-07-13 19:13:18,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:18,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159435703] [2021-07-13 19:13:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:18,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:18,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159435703] [2021-07-13 19:13:18,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159435703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:18,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498724470] [2021-07-13 19:13:18,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:18,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:13:18,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:18,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:18,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:18,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498724470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:18,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:18,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-07-13 19:13:18,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411030011] [2021-07-13 19:13:18,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:18,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:18,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:18,776 INFO L87 Difference]: Start difference. First operand 4145 states and 10742 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:18,949 INFO L93 Difference]: Finished difference Result 5126 states and 12564 transitions. [2021-07-13 19:13:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:18,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:18,955 INFO L225 Difference]: With dead ends: 5126 [2021-07-13 19:13:18,955 INFO L226 Difference]: Without dead ends: 5099 [2021-07-13 19:13:18,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-07-13 19:13:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 4145. [2021-07-13 19:13:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 2.591457528957529) internal successors, (10739), 4144 states have internal predecessors, (10739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:19,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10739 transitions. [2021-07-13 19:13:19,030 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10739 transitions. Word has length 41 [2021-07-13 19:13:19,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:19,031 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10739 transitions. [2021-07-13 19:13:19,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:19,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10739 transitions. [2021-07-13 19:13:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:19,034 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:19,034 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:19,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-07-13 19:13:19,234 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:19,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1839961388, now seen corresponding path program 84 times [2021-07-13 19:13:19,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:19,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520228533] [2021-07-13 19:13:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:19,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:19,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520228533] [2021-07-13 19:13:19,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520228533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:19,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992511299] [2021-07-13 19:13:19,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:19,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:13:19,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:19,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:19,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:19,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992511299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:19,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:19,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:13:19,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719047567] [2021-07-13 19:13:19,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:19,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:19,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:19,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:19,398 INFO L87 Difference]: Start difference. First operand 4145 states and 10739 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:20,271 INFO L93 Difference]: Finished difference Result 8258 states and 19418 transitions. [2021-07-13 19:13:20,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 19:13:20,271 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:20,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:20,282 INFO L225 Difference]: With dead ends: 8258 [2021-07-13 19:13:20,282 INFO L226 Difference]: Without dead ends: 7982 [2021-07-13 19:13:20,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 558.8ms TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 19:13:20,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7982 states. [2021-07-13 19:13:20,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7982 to 4501. [2021-07-13 19:13:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.5802222222222224) internal successors, (11611), 4500 states have internal predecessors, (11611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11611 transitions. [2021-07-13 19:13:20,351 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11611 transitions. Word has length 41 [2021-07-13 19:13:20,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:20,351 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11611 transitions. [2021-07-13 19:13:20,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11611 transitions. [2021-07-13 19:13:20,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:20,355 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:20,355 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:20,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-07-13 19:13:20,555 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:20,556 INFO L82 PathProgramCache]: Analyzing trace with hash -561433039, now seen corresponding path program 85 times [2021-07-13 19:13:20,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:20,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021866639] [2021-07-13 19:13:20,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:20,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:20,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021866639] [2021-07-13 19:13:20,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021866639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:20,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024557900] [2021-07-13 19:13:20,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:20,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024557900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:20,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:20,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:13:20,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966390624] [2021-07-13 19:13:20,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:20,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:20,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:20,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:20,720 INFO L87 Difference]: Start difference. First operand 4501 states and 11611 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:20,868 INFO L93 Difference]: Finished difference Result 5578 states and 13597 transitions. [2021-07-13 19:13:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:20,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:20,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:20,875 INFO L225 Difference]: With dead ends: 5578 [2021-07-13 19:13:20,875 INFO L226 Difference]: Without dead ends: 5542 [2021-07-13 19:13:20,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2021-07-13 19:13:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4501. [2021-07-13 19:13:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.5795555555555554) internal successors, (11608), 4500 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11608 transitions. [2021-07-13 19:13:20,935 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11608 transitions. Word has length 41 [2021-07-13 19:13:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:20,936 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11608 transitions. [2021-07-13 19:13:20,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11608 transitions. [2021-07-13 19:13:20,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:20,939 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:20,939 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:21,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:21,140 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:21,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:21,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1686647522, now seen corresponding path program 86 times [2021-07-13 19:13:21,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:21,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564694654] [2021-07-13 19:13:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:21,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:21,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564694654] [2021-07-13 19:13:21,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564694654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:21,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255884897] [2021-07-13 19:13:21,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:21,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:21,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:21,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:13:21,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255884897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:21,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:21,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:13:21,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806826728] [2021-07-13 19:13:21,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:21,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:21,315 INFO L87 Difference]: Start difference. First operand 4501 states and 11608 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:21,688 INFO L93 Difference]: Finished difference Result 5731 states and 13840 transitions. [2021-07-13 19:13:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:13:21,688 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:21,695 INFO L225 Difference]: With dead ends: 5731 [2021-07-13 19:13:21,695 INFO L226 Difference]: Without dead ends: 5353 [2021-07-13 19:13:21,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 206.7ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:13:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-07-13 19:13:21,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3673. [2021-07-13 19:13:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3672 states have (on average 2.6173747276688455) internal successors, (9611), 3672 states have internal predecessors, (9611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 9611 transitions. [2021-07-13 19:13:21,748 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 9611 transitions. Word has length 41 [2021-07-13 19:13:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:21,749 INFO L482 AbstractCegarLoop]: Abstraction has 3673 states and 9611 transitions. [2021-07-13 19:13:21,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 9611 transitions. [2021-07-13 19:13:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:21,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:21,751 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:21,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-07-13 19:13:21,952 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:21,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:21,952 INFO L82 PathProgramCache]: Analyzing trace with hash 826705595, now seen corresponding path program 37 times [2021-07-13 19:13:21,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:21,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952427742] [2021-07-13 19:13:21,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:21,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:21,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952427742] [2021-07-13 19:13:21,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952427742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:21,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522052504] [2021-07-13 19:13:21,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:22,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:22,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522052504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:22,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:22,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-13 19:13:22,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355787332] [2021-07-13 19:13:22,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:22,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:22,090 INFO L87 Difference]: Start difference. First operand 3673 states and 9611 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:22,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:22,367 INFO L93 Difference]: Finished difference Result 4473 states and 11190 transitions. [2021-07-13 19:13:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:13:22,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:22,373 INFO L225 Difference]: With dead ends: 4473 [2021-07-13 19:13:22,373 INFO L226 Difference]: Without dead ends: 4473 [2021-07-13 19:13:22,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2021-07-13 19:13:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 3628. [2021-07-13 19:13:22,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 2.626413013509788) internal successors, (9526), 3627 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9526 transitions. [2021-07-13 19:13:22,417 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9526 transitions. Word has length 41 [2021-07-13 19:13:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:22,417 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9526 transitions. [2021-07-13 19:13:22,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9526 transitions. [2021-07-13 19:13:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:13:22,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:22,419 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:22,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:22,620 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:22,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:22,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1858902121, now seen corresponding path program 87 times [2021-07-13 19:13:22,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:22,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201260007] [2021-07-13 19:13:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:22,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:22,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201260007] [2021-07-13 19:13:22,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201260007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:22,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025194002] [2021-07-13 19:13:22,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:22,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:13:22,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:13:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:22,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025194002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:22,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:22,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:13:22,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096938841] [2021-07-13 19:13:22,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:22,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:22,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:22,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:22,783 INFO L87 Difference]: Start difference. First operand 3628 states and 9526 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:22,958 INFO L93 Difference]: Finished difference Result 4326 states and 10808 transitions. [2021-07-13 19:13:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:22,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:13:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:22,964 INFO L225 Difference]: With dead ends: 4326 [2021-07-13 19:13:22,964 INFO L226 Difference]: Without dead ends: 4279 [2021-07-13 19:13:22,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:13:22,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-07-13 19:13:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3637. [2021-07-13 19:13:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 2.623762376237624) internal successors, (9540), 3636 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 9540 transitions. [2021-07-13 19:13:23,013 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 9540 transitions. Word has length 41 [2021-07-13 19:13:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:23,013 INFO L482 AbstractCegarLoop]: Abstraction has 3637 states and 9540 transitions. [2021-07-13 19:13:23,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:23,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 9540 transitions. [2021-07-13 19:13:23,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 19:13:23,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:23,016 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:23,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-07-13 19:13:23,217 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:23,217 INFO L82 PathProgramCache]: Analyzing trace with hash 714915480, now seen corresponding path program 88 times [2021-07-13 19:13:23,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:23,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62275266] [2021-07-13 19:13:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:23,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:23,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62275266] [2021-07-13 19:13:23,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62275266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:23,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849493777] [2021-07-13 19:13:23,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:23,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:23,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:23,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:23,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849493777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:23,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:23,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-07-13 19:13:23,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106897869] [2021-07-13 19:13:23,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:13:23,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:13:23,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:13:23,489 INFO L87 Difference]: Start difference. First operand 3637 states and 9540 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:24,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:24,348 INFO L93 Difference]: Finished difference Result 5488 states and 13282 transitions. [2021-07-13 19:13:24,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:13:24,348 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 19:13:24,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:24,356 INFO L225 Difference]: With dead ends: 5488 [2021-07-13 19:13:24,356 INFO L226 Difference]: Without dead ends: 5450 [2021-07-13 19:13:24,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:13:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-07-13 19:13:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4188. [2021-07-13 19:13:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.571053260090757) internal successors, (10765), 4187 states have internal predecessors, (10765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 10765 transitions. [2021-07-13 19:13:24,412 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 10765 transitions. Word has length 44 [2021-07-13 19:13:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:24,412 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 10765 transitions. [2021-07-13 19:13:24,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 10765 transitions. [2021-07-13 19:13:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 19:13:24,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:24,416 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:24,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-07-13 19:13:24,616 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:24,616 INFO L82 PathProgramCache]: Analyzing trace with hash 667584024, now seen corresponding path program 89 times [2021-07-13 19:13:24,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:24,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139159025] [2021-07-13 19:13:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:13:24,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:24,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139159025] [2021-07-13 19:13:24,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139159025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:24,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665960419] [2021-07-13 19:13:24,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:24,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:13:24,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:24,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:24,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:13:24,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665960419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:24,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:24,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:13:24,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775432972] [2021-07-13 19:13:24,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:13:24,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:13:24,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:13:24,752 INFO L87 Difference]: Start difference. First operand 4188 states and 10765 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:24,932 INFO L93 Difference]: Finished difference Result 4818 states and 11987 transitions. [2021-07-13 19:13:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:13:24,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 19:13:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:24,938 INFO L225 Difference]: With dead ends: 4818 [2021-07-13 19:13:24,939 INFO L226 Difference]: Without dead ends: 4783 [2021-07-13 19:13:24,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:13:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-07-13 19:13:24,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4206. [2021-07-13 19:13:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 2.5690844233055885) internal successors, (10803), 4205 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:24,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 10803 transitions. [2021-07-13 19:13:24,991 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 10803 transitions. Word has length 44 [2021-07-13 19:13:24,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:24,991 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 10803 transitions. [2021-07-13 19:13:24,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:24,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 10803 transitions. [2021-07-13 19:13:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 19:13:24,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:24,995 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:25,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:25,195 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:25,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:25,196 INFO L82 PathProgramCache]: Analyzing trace with hash -19269454, now seen corresponding path program 90 times [2021-07-13 19:13:25,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:25,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003647109] [2021-07-13 19:13:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:13:25,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003647109] [2021-07-13 19:13:25,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003647109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712933044] [2021-07-13 19:13:25,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:25,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:13:25,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:25,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 19 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:25,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712933044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:25,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:25,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:25,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297519798] [2021-07-13 19:13:25,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:25,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:25,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:25,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:25,395 INFO L87 Difference]: Start difference. First operand 4206 states and 10803 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:25,987 INFO L93 Difference]: Finished difference Result 6446 states and 15040 transitions. [2021-07-13 19:13:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:13:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 19:13:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:25,996 INFO L225 Difference]: With dead ends: 6446 [2021-07-13 19:13:25,996 INFO L226 Difference]: Without dead ends: 6383 [2021-07-13 19:13:25,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:13:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2021-07-13 19:13:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 4276. [2021-07-13 19:13:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 2.56046783625731) internal successors, (10946), 4275 states have internal predecessors, (10946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 10946 transitions. [2021-07-13 19:13:26,057 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 10946 transitions. Word has length 44 [2021-07-13 19:13:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:26,057 INFO L482 AbstractCegarLoop]: Abstraction has 4276 states and 10946 transitions. [2021-07-13 19:13:26,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 10946 transitions. [2021-07-13 19:13:26,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 19:13:26,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:26,062 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:26,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-07-13 19:13:26,262 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:26,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:26,262 INFO L82 PathProgramCache]: Analyzing trace with hash -847034408, now seen corresponding path program 91 times [2021-07-13 19:13:26,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:26,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676210784] [2021-07-13 19:13:26,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:26,317 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:13:26,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:26,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676210784] [2021-07-13 19:13:26,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676210784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:26,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431244072] [2021-07-13 19:13:26,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:26,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:26,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:26,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:13:26,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431244072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:26,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:26,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-13 19:13:26,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232060786] [2021-07-13 19:13:26,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:13:26,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:26,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:13:26,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:13:26,396 INFO L87 Difference]: Start difference. First operand 4276 states and 10946 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:26,576 INFO L93 Difference]: Finished difference Result 4915 states and 12209 transitions. [2021-07-13 19:13:26,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:13:26,576 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 19:13:26,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:26,582 INFO L225 Difference]: With dead ends: 4915 [2021-07-13 19:13:26,582 INFO L226 Difference]: Without dead ends: 4877 [2021-07-13 19:13:26,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:13:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-07-13 19:13:26,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4348. [2021-07-13 19:13:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4347 states have (on average 2.5500345065562455) internal successors, (11085), 4347 states have internal predecessors, (11085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 11085 transitions. [2021-07-13 19:13:26,631 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 11085 transitions. Word has length 44 [2021-07-13 19:13:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:26,632 INFO L482 AbstractCegarLoop]: Abstraction has 4348 states and 11085 transitions. [2021-07-13 19:13:26,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 11085 transitions. [2021-07-13 19:13:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 19:13:26,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:26,636 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:26,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:26,836 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:26,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:26,837 INFO L82 PathProgramCache]: Analyzing trace with hash 909434610, now seen corresponding path program 92 times [2021-07-13 19:13:26,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:26,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817030638] [2021-07-13 19:13:26,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:13:26,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817030638] [2021-07-13 19:13:26,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817030638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:26,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093692527] [2021-07-13 19:13:26,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:26,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:26,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:26,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:26,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:27,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093692527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:27,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:27,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:27,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355991932] [2021-07-13 19:13:27,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:27,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:27,032 INFO L87 Difference]: Start difference. First operand 4348 states and 11085 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:27,656 INFO L93 Difference]: Finished difference Result 6734 states and 15579 transitions. [2021-07-13 19:13:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:13:27,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 19:13:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:27,665 INFO L225 Difference]: With dead ends: 6734 [2021-07-13 19:13:27,665 INFO L226 Difference]: Without dead ends: 6671 [2021-07-13 19:13:27,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:13:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6671 states. [2021-07-13 19:13:27,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6671 to 4452. [2021-07-13 19:13:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4452 states, 4451 states have (on average 2.5362839811278364) internal successors, (11289), 4451 states have internal predecessors, (11289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 11289 transitions. [2021-07-13 19:13:27,725 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 11289 transitions. Word has length 44 [2021-07-13 19:13:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:27,725 INFO L482 AbstractCegarLoop]: Abstraction has 4452 states and 11289 transitions. [2021-07-13 19:13:27,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 11289 transitions. [2021-07-13 19:13:27,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-13 19:13:27,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:27,730 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:27,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:27,930 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:27,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2003584616, now seen corresponding path program 93 times [2021-07-13 19:13:27,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:27,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612528797] [2021-07-13 19:13:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:13:27,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:27,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612528797] [2021-07-13 19:13:27,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612528797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:27,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27361683] [2021-07-13 19:13:27,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:27,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:13:27,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:27,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:28,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27361683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:28,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:28,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:28,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025650252] [2021-07-13 19:13:28,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:28,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:28,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:28,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:28,123 INFO L87 Difference]: Start difference. First operand 4452 states and 11289 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:28,743 INFO L93 Difference]: Finished difference Result 7036 states and 16396 transitions. [2021-07-13 19:13:28,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:13:28,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-13 19:13:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:28,755 INFO L225 Difference]: With dead ends: 7036 [2021-07-13 19:13:28,755 INFO L226 Difference]: Without dead ends: 6998 [2021-07-13 19:13:28,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:13:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6998 states. [2021-07-13 19:13:28,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6998 to 4889. [2021-07-13 19:13:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4889 states, 4888 states have (on average 2.5384615384615383) internal successors, (12408), 4888 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4889 states to 4889 states and 12408 transitions. [2021-07-13 19:13:28,834 INFO L78 Accepts]: Start accepts. Automaton has 4889 states and 12408 transitions. Word has length 44 [2021-07-13 19:13:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:28,834 INFO L482 AbstractCegarLoop]: Abstraction has 4889 states and 12408 transitions. [2021-07-13 19:13:28,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4889 states and 12408 transitions. [2021-07-13 19:13:28,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:28,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:28,838 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:29,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:29,039 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash 106678869, now seen corresponding path program 38 times [2021-07-13 19:13:29,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:29,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793683624] [2021-07-13 19:13:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:29,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:29,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793683624] [2021-07-13 19:13:29,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793683624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:29,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384447141] [2021-07-13 19:13:29,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:29,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:29,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:29,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:13:29,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:29,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384447141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:29,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:29,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-07-13 19:13:29,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864987072] [2021-07-13 19:13:29,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:13:29,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:29,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:13:29,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:13:29,803 INFO L87 Difference]: Start difference. First operand 4889 states and 12408 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:37,423 INFO L93 Difference]: Finished difference Result 12578 states and 28875 transitions. [2021-07-13 19:13:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-07-13 19:13:37,423 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:37,441 INFO L225 Difference]: With dead ends: 12578 [2021-07-13 19:13:37,441 INFO L226 Difference]: Without dead ends: 12155 [2021-07-13 19:13:37,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 6289.0ms TimeCoverageRelationStatistics Valid=5955, Invalid=38777, Unknown=0, NotChecked=0, Total=44732 [2021-07-13 19:13:37,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12155 states. [2021-07-13 19:13:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12155 to 6139. [2021-07-13 19:13:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6139 states, 6138 states have (on average 2.623330074942978) internal successors, (16102), 6138 states have internal predecessors, (16102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 16102 transitions. [2021-07-13 19:13:37,559 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 16102 transitions. Word has length 47 [2021-07-13 19:13:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:37,559 INFO L482 AbstractCegarLoop]: Abstraction has 6139 states and 16102 transitions. [2021-07-13 19:13:37,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 16102 transitions. [2021-07-13 19:13:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:37,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:37,565 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:37,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:37,766 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1531001323, now seen corresponding path program 94 times [2021-07-13 19:13:37,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:37,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315474037] [2021-07-13 19:13:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:37,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315474037] [2021-07-13 19:13:37,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315474037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:37,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415865830] [2021-07-13 19:13:37,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:37,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:37,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:37,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:37,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:38,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415865830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:38,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:38,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-13 19:13:38,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710830562] [2021-07-13 19:13:38,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:13:38,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:38,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:13:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:13:38,120 INFO L87 Difference]: Start difference. First operand 6139 states and 16102 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:38,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:38,756 INFO L93 Difference]: Finished difference Result 6357 states and 16438 transitions. [2021-07-13 19:13:38,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:38,756 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:38,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:38,765 INFO L225 Difference]: With dead ends: 6357 [2021-07-13 19:13:38,765 INFO L226 Difference]: Without dead ends: 6277 [2021-07-13 19:13:38,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:13:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-07-13 19:13:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 6123. [2021-07-13 19:13:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6123 states, 6122 states have (on average 2.6210388761842536) internal successors, (16046), 6122 states have internal predecessors, (16046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6123 states to 6123 states and 16046 transitions. [2021-07-13 19:13:38,842 INFO L78 Accepts]: Start accepts. Automaton has 6123 states and 16046 transitions. Word has length 47 [2021-07-13 19:13:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:38,842 INFO L482 AbstractCegarLoop]: Abstraction has 6123 states and 16046 transitions. [2021-07-13 19:13:38,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 6123 states and 16046 transitions. [2021-07-13 19:13:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:38,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:38,847 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:39,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:39,049 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:39,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:39,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131688, now seen corresponding path program 39 times [2021-07-13 19:13:39,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:39,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371575197] [2021-07-13 19:13:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:39,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:39,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371575197] [2021-07-13 19:13:39,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371575197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:39,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730916396] [2021-07-13 19:13:39,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:39,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:13:39,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:39,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:39,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730916396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:39,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:39,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:13:39,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626629755] [2021-07-13 19:13:39,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:39,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:39,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:39,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:39,204 INFO L87 Difference]: Start difference. First operand 6123 states and 16046 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:39,346 INFO L93 Difference]: Finished difference Result 8127 states and 20029 transitions. [2021-07-13 19:13:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:39,359 INFO L225 Difference]: With dead ends: 8127 [2021-07-13 19:13:39,359 INFO L226 Difference]: Without dead ends: 8117 [2021-07-13 19:13:39,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:39,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-07-13 19:13:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6179. [2021-07-13 19:13:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6179 states, 6178 states have (on average 2.6264163159598577) internal successors, (16226), 6178 states have internal predecessors, (16226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 16226 transitions. [2021-07-13 19:13:39,449 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 16226 transitions. Word has length 47 [2021-07-13 19:13:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:39,449 INFO L482 AbstractCegarLoop]: Abstraction has 6179 states and 16226 transitions. [2021-07-13 19:13:39,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:39,449 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 16226 transitions. [2021-07-13 19:13:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:39,455 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:39,455 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:39,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:39,657 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash 800939048, now seen corresponding path program 40 times [2021-07-13 19:13:39,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:39,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531357693] [2021-07-13 19:13:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:39,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:39,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531357693] [2021-07-13 19:13:39,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531357693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:39,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539857630] [2021-07-13 19:13:39,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:39,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:39,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:39,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:39,815 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:39,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539857630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:39,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:39,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:13:39,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521533145] [2021-07-13 19:13:39,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:39,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:39,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:39,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:39,816 INFO L87 Difference]: Start difference. First operand 6179 states and 16226 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:39,963 INFO L93 Difference]: Finished difference Result 9199 states and 22998 transitions. [2021-07-13 19:13:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:39,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:39,978 INFO L225 Difference]: With dead ends: 9199 [2021-07-13 19:13:39,978 INFO L226 Difference]: Without dead ends: 9199 [2021-07-13 19:13:39,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9199 states. [2021-07-13 19:13:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9199 to 6799. [2021-07-13 19:13:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 6798 states have (on average 2.674315975286849) internal successors, (18180), 6798 states have internal predecessors, (18180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 18180 transitions. [2021-07-13 19:13:40,104 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 18180 transitions. Word has length 47 [2021-07-13 19:13:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:40,104 INFO L482 AbstractCegarLoop]: Abstraction has 6799 states and 18180 transitions. [2021-07-13 19:13:40,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 18180 transitions. [2021-07-13 19:13:40,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:40,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:40,110 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:40,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-13 19:13:40,310 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:40,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:40,311 INFO L82 PathProgramCache]: Analyzing trace with hash 267073672, now seen corresponding path program 95 times [2021-07-13 19:13:40,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:40,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900878421] [2021-07-13 19:13:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:40,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:40,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900878421] [2021-07-13 19:13:40,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900878421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:40,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008921118] [2021-07-13 19:13:40,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:40,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:13:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:40,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:40,474 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:40,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008921118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:40,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:40,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2021-07-13 19:13:40,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737899567] [2021-07-13 19:13:40,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:40,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:40,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:40,475 INFO L87 Difference]: Start difference. First operand 6799 states and 18180 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:40,672 INFO L93 Difference]: Finished difference Result 7639 states and 19695 transitions. [2021-07-13 19:13:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:40,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:40,684 INFO L225 Difference]: With dead ends: 7639 [2021-07-13 19:13:40,685 INFO L226 Difference]: Without dead ends: 7633 [2021-07-13 19:13:40,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2021-07-13 19:13:40,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 6743. [2021-07-13 19:13:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6743 states, 6742 states have (on average 2.6702758825274397) internal successors, (18003), 6742 states have internal predecessors, (18003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:40,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 18003 transitions. [2021-07-13 19:13:40,780 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 18003 transitions. Word has length 47 [2021-07-13 19:13:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:40,780 INFO L482 AbstractCegarLoop]: Abstraction has 6743 states and 18003 transitions. [2021-07-13 19:13:40,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 18003 transitions. [2021-07-13 19:13:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:40,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:40,786 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:41,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-13 19:13:41,002 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:41,002 INFO L82 PathProgramCache]: Analyzing trace with hash -38499627, now seen corresponding path program 41 times [2021-07-13 19:13:41,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:41,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590586570] [2021-07-13 19:13:41,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:41,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:41,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590586570] [2021-07-13 19:13:41,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590586570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:41,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117340682] [2021-07-13 19:13:41,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:41,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:13:41,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:41,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:41,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:41,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117340682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:41,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:41,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:13:41,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549729525] [2021-07-13 19:13:41,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:41,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:41,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:41,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:41,164 INFO L87 Difference]: Start difference. First operand 6743 states and 18003 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:41,495 INFO L93 Difference]: Finished difference Result 7999 states and 20457 transitions. [2021-07-13 19:13:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:41,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:41,509 INFO L225 Difference]: With dead ends: 7999 [2021-07-13 19:13:41,510 INFO L226 Difference]: Without dead ends: 7961 [2021-07-13 19:13:41,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-07-13 19:13:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 6838. [2021-07-13 19:13:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.6676905075325434) internal successors, (18239), 6837 states have internal predecessors, (18239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:41,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18239 transitions. [2021-07-13 19:13:41,613 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18239 transitions. Word has length 47 [2021-07-13 19:13:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:41,613 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18239 transitions. [2021-07-13 19:13:41,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18239 transitions. [2021-07-13 19:13:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:41,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:41,620 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:41,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:41,820 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1592196484, now seen corresponding path program 96 times [2021-07-13 19:13:41,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:41,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236944076] [2021-07-13 19:13:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:13:41,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236944076] [2021-07-13 19:13:41,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236944076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546147412] [2021-07-13 19:13:41,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:41,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:13:41,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:41,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:41,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:13:41,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546147412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:41,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:41,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:13:41,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934014084] [2021-07-13 19:13:41,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:13:41,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:13:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:13:41,955 INFO L87 Difference]: Start difference. First operand 6838 states and 18239 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:42,082 INFO L93 Difference]: Finished difference Result 7980 states and 20237 transitions. [2021-07-13 19:13:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:13:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:42,094 INFO L225 Difference]: With dead ends: 7980 [2021-07-13 19:13:42,094 INFO L226 Difference]: Without dead ends: 7977 [2021-07-13 19:13:42,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 40.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-07-13 19:13:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 6818. [2021-07-13 19:13:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6818 states, 6817 states have (on average 2.664661874724952) internal successors, (18165), 6817 states have internal predecessors, (18165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6818 states to 6818 states and 18165 transitions. [2021-07-13 19:13:42,197 INFO L78 Accepts]: Start accepts. Automaton has 6818 states and 18165 transitions. Word has length 47 [2021-07-13 19:13:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:42,197 INFO L482 AbstractCegarLoop]: Abstraction has 6818 states and 18165 transitions. [2021-07-13 19:13:42,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 6818 states and 18165 transitions. [2021-07-13 19:13:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:42,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:42,204 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:42,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-07-13 19:13:42,419 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1385133918, now seen corresponding path program 97 times [2021-07-13 19:13:42,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:42,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408945286] [2021-07-13 19:13:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:13:42,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408945286] [2021-07-13 19:13:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408945286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162695446] [2021-07-13 19:13:42,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:42,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:42,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:13:42,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162695446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:42,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:42,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:13:42,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662890127] [2021-07-13 19:13:42,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:42,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:42,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:42,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:42,604 INFO L87 Difference]: Start difference. First operand 6818 states and 18165 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:42,818 INFO L93 Difference]: Finished difference Result 7990 states and 20202 transitions. [2021-07-13 19:13:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:42,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:42,843 INFO L225 Difference]: With dead ends: 7990 [2021-07-13 19:13:42,843 INFO L226 Difference]: Without dead ends: 7972 [2021-07-13 19:13:42,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:42,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7972 states. [2021-07-13 19:13:43,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7972 to 6576. [2021-07-13 19:13:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 2.6518631178707226) internal successors, (17436), 6575 states have internal predecessors, (17436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:43,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17436 transitions. [2021-07-13 19:13:43,098 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17436 transitions. Word has length 47 [2021-07-13 19:13:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:43,098 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17436 transitions. [2021-07-13 19:13:43,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17436 transitions. [2021-07-13 19:13:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:43,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:43,121 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:43,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:43,336 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:43,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:43,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1461833365, now seen corresponding path program 98 times [2021-07-13 19:13:43,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:43,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219326745] [2021-07-13 19:13:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:43,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:43,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219326745] [2021-07-13 19:13:43,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219326745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:43,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093733553] [2021-07-13 19:13:43,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:43,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:43,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:43,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:43,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093733553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:43,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:43,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:13:43,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032315915] [2021-07-13 19:13:43,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:43,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:43,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:43,519 INFO L87 Difference]: Start difference. First operand 6576 states and 17436 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:43,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:43,983 INFO L93 Difference]: Finished difference Result 7270 states and 18664 transitions. [2021-07-13 19:13:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:43,994 INFO L225 Difference]: With dead ends: 7270 [2021-07-13 19:13:43,994 INFO L226 Difference]: Without dead ends: 7232 [2021-07-13 19:13:43,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2021-07-13 19:13:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 6547. [2021-07-13 19:13:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 2.6515429269783075) internal successors, (17357), 6546 states have internal predecessors, (17357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 17357 transitions. [2021-07-13 19:13:44,089 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 17357 transitions. Word has length 47 [2021-07-13 19:13:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:44,089 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 17357 transitions. [2021-07-13 19:13:44,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 17357 transitions. [2021-07-13 19:13:44,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:44,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:44,095 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:44,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-13 19:13:44,309 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash 848297185, now seen corresponding path program 99 times [2021-07-13 19:13:44,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:44,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269961401] [2021-07-13 19:13:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:13:44,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:44,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269961401] [2021-07-13 19:13:44,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269961401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:44,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200275364] [2021-07-13 19:13:44,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:44,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:13:44,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:44,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:44,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:13:44,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200275364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:44,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:44,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:13:44,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94368249] [2021-07-13 19:13:44,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:44,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:44,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:44,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:44,567 INFO L87 Difference]: Start difference. First operand 6547 states and 17357 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:44,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:44,953 INFO L93 Difference]: Finished difference Result 7510 states and 19214 transitions. [2021-07-13 19:13:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:44,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:44,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:44,965 INFO L225 Difference]: With dead ends: 7510 [2021-07-13 19:13:44,965 INFO L226 Difference]: Without dead ends: 7498 [2021-07-13 19:13:44,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2021-07-13 19:13:45,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 6557. [2021-07-13 19:13:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6557 states, 6556 states have (on average 2.6505491153142158) internal successors, (17377), 6556 states have internal predecessors, (17377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 17377 transitions. [2021-07-13 19:13:45,072 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 17377 transitions. Word has length 47 [2021-07-13 19:13:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:45,072 INFO L482 AbstractCegarLoop]: Abstraction has 6557 states and 17377 transitions. [2021-07-13 19:13:45,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 17377 transitions. [2021-07-13 19:13:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:45,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:45,078 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:45,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-13 19:13:45,279 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:45,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:45,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1304752777, now seen corresponding path program 100 times [2021-07-13 19:13:45,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:45,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385076046] [2021-07-13 19:13:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:45,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:45,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385076046] [2021-07-13 19:13:45,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385076046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:45,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219981057] [2021-07-13 19:13:45,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:45,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:45,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:45,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:45,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:45,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219981057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:45,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:45,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:13:45,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938309604] [2021-07-13 19:13:45,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:45,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:45,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:45,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:45,499 INFO L87 Difference]: Start difference. First operand 6557 states and 17377 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:45,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:45,902 INFO L93 Difference]: Finished difference Result 8002 states and 20257 transitions. [2021-07-13 19:13:45,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:13:45,902 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:45,914 INFO L225 Difference]: With dead ends: 8002 [2021-07-13 19:13:45,914 INFO L226 Difference]: Without dead ends: 7990 [2021-07-13 19:13:45,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:45,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-07-13 19:13:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6589. [2021-07-13 19:13:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6589 states, 6588 states have (on average 2.6495142683667274) internal successors, (17455), 6588 states have internal predecessors, (17455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 17455 transitions. [2021-07-13 19:13:46,009 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 17455 transitions. Word has length 47 [2021-07-13 19:13:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:46,009 INFO L482 AbstractCegarLoop]: Abstraction has 6589 states and 17455 transitions. [2021-07-13 19:13:46,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 17455 transitions. [2021-07-13 19:13:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:46,014 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:46,014 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:46,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-13 19:13:46,215 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:46,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1542814294, now seen corresponding path program 42 times [2021-07-13 19:13:46,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:46,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720191804] [2021-07-13 19:13:46,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:46,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:46,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720191804] [2021-07-13 19:13:46,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720191804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:46,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329882463] [2021-07-13 19:13:46,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:46,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:13:46,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:46,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:46,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329882463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:46,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:46,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 16 [2021-07-13 19:13:46,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907592094] [2021-07-13 19:13:46,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:46,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:46,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:46,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:46,434 INFO L87 Difference]: Start difference. First operand 6589 states and 17455 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:46,703 INFO L93 Difference]: Finished difference Result 9290 states and 23114 transitions. [2021-07-13 19:13:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:46,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:46,719 INFO L225 Difference]: With dead ends: 9290 [2021-07-13 19:13:46,719 INFO L226 Difference]: Without dead ends: 9268 [2021-07-13 19:13:46,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:46,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-07-13 19:13:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 6764. [2021-07-13 19:13:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6764 states, 6763 states have (on average 2.6578441520035487) internal successors, (17975), 6763 states have internal predecessors, (17975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 17975 transitions. [2021-07-13 19:13:46,844 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 17975 transitions. Word has length 47 [2021-07-13 19:13:46,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:46,844 INFO L482 AbstractCegarLoop]: Abstraction has 6764 states and 17975 transitions. [2021-07-13 19:13:46,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:46,844 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 17975 transitions. [2021-07-13 19:13:46,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:46,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:46,850 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:47,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 19:13:47,051 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:47,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:47,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2130272592, now seen corresponding path program 43 times [2021-07-13 19:13:47,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:47,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216706226] [2021-07-13 19:13:47,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:47,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:47,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216706226] [2021-07-13 19:13:47,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216706226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:47,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099821462] [2021-07-13 19:13:47,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:47,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:47,197 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:47,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099821462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:47,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:47,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:13:47,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954408060] [2021-07-13 19:13:47,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:47,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:47,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:47,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:47,198 INFO L87 Difference]: Start difference. First operand 6764 states and 17975 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:47,343 INFO L93 Difference]: Finished difference Result 9757 states and 24151 transitions. [2021-07-13 19:13:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:47,343 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:47,357 INFO L225 Difference]: With dead ends: 9757 [2021-07-13 19:13:47,357 INFO L226 Difference]: Without dead ends: 9757 [2021-07-13 19:13:47,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-07-13 19:13:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 6769. [2021-07-13 19:13:47,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 2.6569148936170213) internal successors, (17982), 6768 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 17982 transitions. [2021-07-13 19:13:47,468 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 17982 transitions. Word has length 47 [2021-07-13 19:13:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:47,468 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 17982 transitions. [2021-07-13 19:13:47,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 17982 transitions. [2021-07-13 19:13:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:47,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:47,474 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:47,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:47,675 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:47,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:47,675 INFO L82 PathProgramCache]: Analyzing trace with hash 492700136, now seen corresponding path program 44 times [2021-07-13 19:13:47,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:47,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211873911] [2021-07-13 19:13:47,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:47,731 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:47,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:47,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211873911] [2021-07-13 19:13:47,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211873911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:47,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19123624] [2021-07-13 19:13:47,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:47,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:47,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:47,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:47,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:47,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19123624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:47,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:47,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:13:47,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322911509] [2021-07-13 19:13:47,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:47,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:47,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:47,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:47,850 INFO L87 Difference]: Start difference. First operand 6769 states and 17982 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:48,041 INFO L93 Difference]: Finished difference Result 8996 states and 22443 transitions. [2021-07-13 19:13:48,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:48,041 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:48,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:48,054 INFO L225 Difference]: With dead ends: 8996 [2021-07-13 19:13:48,054 INFO L226 Difference]: Without dead ends: 8996 [2021-07-13 19:13:48,054 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:48,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2021-07-13 19:13:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 6596. [2021-07-13 19:13:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.650037907505686) internal successors, (17477), 6595 states have internal predecessors, (17477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17477 transitions. [2021-07-13 19:13:48,157 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17477 transitions. Word has length 47 [2021-07-13 19:13:48,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:48,157 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17477 transitions. [2021-07-13 19:13:48,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17477 transitions. [2021-07-13 19:13:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:48,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:48,163 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:48,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-07-13 19:13:48,363 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash 227806332, now seen corresponding path program 101 times [2021-07-13 19:13:48,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:48,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533679942] [2021-07-13 19:13:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:48,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:48,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533679942] [2021-07-13 19:13:48,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533679942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:48,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468007384] [2021-07-13 19:13:48,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:48,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:13:48,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:48,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:48,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:48,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468007384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:48,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:48,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-07-13 19:13:48,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477089572] [2021-07-13 19:13:48,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:13:48,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:48,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:13:48,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:48,543 INFO L87 Difference]: Start difference. First operand 6596 states and 17477 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:48,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:48,770 INFO L93 Difference]: Finished difference Result 7771 states and 19586 transitions. [2021-07-13 19:13:48,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:13:48,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:48,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:48,782 INFO L225 Difference]: With dead ends: 7771 [2021-07-13 19:13:48,782 INFO L226 Difference]: Without dead ends: 7753 [2021-07-13 19:13:48,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:48,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2021-07-13 19:13:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 6596. [2021-07-13 19:13:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.648521607278241) internal successors, (17467), 6595 states have internal predecessors, (17467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17467 transitions. [2021-07-13 19:13:48,905 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17467 transitions. Word has length 47 [2021-07-13 19:13:48,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:48,905 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17467 transitions. [2021-07-13 19:13:48,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17467 transitions. [2021-07-13 19:13:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:48,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:48,911 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:49,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:49,111 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:49,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:49,112 INFO L82 PathProgramCache]: Analyzing trace with hash -866264581, now seen corresponding path program 45 times [2021-07-13 19:13:49,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:49,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522211995] [2021-07-13 19:13:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:49,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:49,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522211995] [2021-07-13 19:13:49,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522211995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:49,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696149599] [2021-07-13 19:13:49,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:49,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:13:49,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:49,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:49,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:49,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696149599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:49,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:49,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 21 [2021-07-13 19:13:49,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839101666] [2021-07-13 19:13:49,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:13:49,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:49,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:13:49,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:49,386 INFO L87 Difference]: Start difference. First operand 6596 states and 17467 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:50,430 INFO L93 Difference]: Finished difference Result 8359 states and 20936 transitions. [2021-07-13 19:13:50,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:13:50,431 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:50,443 INFO L225 Difference]: With dead ends: 8359 [2021-07-13 19:13:50,443 INFO L226 Difference]: Without dead ends: 8301 [2021-07-13 19:13:50,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:13:50,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-07-13 19:13:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6703. [2021-07-13 19:13:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 6702 states have (on average 2.645777379886601) internal successors, (17732), 6702 states have internal predecessors, (17732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 17732 transitions. [2021-07-13 19:13:50,544 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 17732 transitions. Word has length 47 [2021-07-13 19:13:50,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:50,544 INFO L482 AbstractCegarLoop]: Abstraction has 6703 states and 17732 transitions. [2021-07-13 19:13:50,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:50,544 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 17732 transitions. [2021-07-13 19:13:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:50,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:50,549 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:50,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-07-13 19:13:50,750 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:50,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:50,750 INFO L82 PathProgramCache]: Analyzing trace with hash 634068411, now seen corresponding path program 102 times [2021-07-13 19:13:50,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:50,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339385765] [2021-07-13 19:13:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:50,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:50,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339385765] [2021-07-13 19:13:50,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339385765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:50,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110903370] [2021-07-13 19:13:50,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:50,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:13:50,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:50,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110903370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:50,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:50,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:13:50,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191265262] [2021-07-13 19:13:50,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:50,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:50,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:50,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:50,931 INFO L87 Difference]: Start difference. First operand 6703 states and 17732 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:51,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:51,352 INFO L93 Difference]: Finished difference Result 7388 states and 18942 transitions. [2021-07-13 19:13:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:51,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:51,362 INFO L225 Difference]: With dead ends: 7388 [2021-07-13 19:13:51,363 INFO L226 Difference]: Without dead ends: 7332 [2021-07-13 19:13:51,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2021-07-13 19:13:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 6671. [2021-07-13 19:13:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6670 states have (on average 2.643478260869565) internal successors, (17632), 6670 states have internal predecessors, (17632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 17632 transitions. [2021-07-13 19:13:51,471 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 17632 transitions. Word has length 47 [2021-07-13 19:13:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:51,471 INFO L482 AbstractCegarLoop]: Abstraction has 6671 states and 17632 transitions. [2021-07-13 19:13:51,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 17632 transitions. [2021-07-13 19:13:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:51,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:51,477 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:51,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-13 19:13:51,677 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash 20532231, now seen corresponding path program 103 times [2021-07-13 19:13:51,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:51,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091149875] [2021-07-13 19:13:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:51,742 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:13:51,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:51,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091149875] [2021-07-13 19:13:51,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091149875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:51,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896249281] [2021-07-13 19:13:51,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:51,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:51,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:13:51,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896249281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:51,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:51,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:13:51,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842745903] [2021-07-13 19:13:51,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:51,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:51,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:51,839 INFO L87 Difference]: Start difference. First operand 6671 states and 17632 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:52,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:52,211 INFO L93 Difference]: Finished difference Result 7705 states and 19640 transitions. [2021-07-13 19:13:52,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:52,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:52,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:52,222 INFO L225 Difference]: With dead ends: 7705 [2021-07-13 19:13:52,222 INFO L226 Difference]: Without dead ends: 7693 [2021-07-13 19:13:52,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-07-13 19:13:52,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 6695. [2021-07-13 19:13:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 2.642067523155064) internal successors, (17686), 6694 states have internal predecessors, (17686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 17686 transitions. [2021-07-13 19:13:52,319 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 17686 transitions. Word has length 47 [2021-07-13 19:13:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:52,319 INFO L482 AbstractCegarLoop]: Abstraction has 6695 states and 17686 transitions. [2021-07-13 19:13:52,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 17686 transitions. [2021-07-13 19:13:52,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:52,325 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:52,325 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:52,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:52,526 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash -136767256, now seen corresponding path program 46 times [2021-07-13 19:13:52,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:52,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638153988] [2021-07-13 19:13:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:52,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:52,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638153988] [2021-07-13 19:13:52,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638153988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:52,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926290897] [2021-07-13 19:13:52,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:52,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:52,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:52,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:52,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:52,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926290897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:52,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:52,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:13:52,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615499448] [2021-07-13 19:13:52,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:52,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:52,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:52,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:52,665 INFO L87 Difference]: Start difference. First operand 6695 states and 17686 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:52,836 INFO L93 Difference]: Finished difference Result 8625 states and 21596 transitions. [2021-07-13 19:13:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:52,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:52,848 INFO L225 Difference]: With dead ends: 8625 [2021-07-13 19:13:52,848 INFO L226 Difference]: Without dead ends: 8605 [2021-07-13 19:13:52,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:52,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-07-13 19:13:52,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 6862. [2021-07-13 19:13:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6861 states have (on average 2.6453869698294707) internal successors, (18150), 6861 states have internal predecessors, (18150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:52,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 18150 transitions. [2021-07-13 19:13:52,965 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 18150 transitions. Word has length 47 [2021-07-13 19:13:52,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:52,965 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 18150 transitions. [2021-07-13 19:13:52,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:52,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 18150 transitions. [2021-07-13 19:13:52,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:52,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:52,972 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:53,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-07-13 19:13:53,172 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:53,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1627825272, now seen corresponding path program 104 times [2021-07-13 19:13:53,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:53,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947632972] [2021-07-13 19:13:53,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:53,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:53,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947632972] [2021-07-13 19:13:53,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947632972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:53,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783550414] [2021-07-13 19:13:53,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:53,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:53,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:53,308 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:53,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783550414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:53,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:53,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:13:53,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598502816] [2021-07-13 19:13:53,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:53,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:53,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:53,308 INFO L87 Difference]: Start difference. First operand 6862 states and 18150 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:53,452 INFO L93 Difference]: Finished difference Result 8135 states and 20382 transitions. [2021-07-13 19:13:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:53,452 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:53,463 INFO L225 Difference]: With dead ends: 8135 [2021-07-13 19:13:53,463 INFO L226 Difference]: Without dead ends: 8117 [2021-07-13 19:13:53,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-07-13 19:13:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6838. [2021-07-13 19:13:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.640485593096387) internal successors, (18053), 6837 states have internal predecessors, (18053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:53,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18053 transitions. [2021-07-13 19:13:53,560 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18053 transitions. Word has length 47 [2021-07-13 19:13:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:53,560 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18053 transitions. [2021-07-13 19:13:53,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18053 transitions. [2021-07-13 19:13:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:53,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:53,566 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:53,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:53,773 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:53,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2132517731, now seen corresponding path program 105 times [2021-07-13 19:13:53,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:53,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516838722] [2021-07-13 19:13:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:53,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516838722] [2021-07-13 19:13:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516838722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104028069] [2021-07-13 19:13:53,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:53,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:13:53,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:53,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:53,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:53,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104028069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:53,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:53,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:13:53,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682174867] [2021-07-13 19:13:53,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:53,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:53,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:53,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:53,928 INFO L87 Difference]: Start difference. First operand 6838 states and 18053 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:54,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:54,365 INFO L93 Difference]: Finished difference Result 8679 states and 21810 transitions. [2021-07-13 19:13:54,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:13:54,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:54,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:54,376 INFO L225 Difference]: With dead ends: 8679 [2021-07-13 19:13:54,376 INFO L226 Difference]: Without dead ends: 8637 [2021-07-13 19:13:54,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-07-13 19:13:54,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6900. [2021-07-13 19:13:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 6899 states have (on average 2.6408175097840267) internal successors, (18219), 6899 states have internal predecessors, (18219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 18219 transitions. [2021-07-13 19:13:54,489 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 18219 transitions. Word has length 47 [2021-07-13 19:13:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:54,489 INFO L482 AbstractCegarLoop]: Abstraction has 6900 states and 18219 transitions. [2021-07-13 19:13:54,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 18219 transitions. [2021-07-13 19:13:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:54,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:54,496 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:54,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:54,696 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:54,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:54,697 INFO L82 PathProgramCache]: Analyzing trace with hash -599958622, now seen corresponding path program 106 times [2021-07-13 19:13:54,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:54,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421264761] [2021-07-13 19:13:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:54,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:54,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421264761] [2021-07-13 19:13:54,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421264761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:54,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448070] [2021-07-13 19:13:54,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:54,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:54,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:54,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:54,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:54,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:54,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:13:54,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137919520] [2021-07-13 19:13:54,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:54,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:54,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:54,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:54,867 INFO L87 Difference]: Start difference. First operand 6900 states and 18219 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:55,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:55,022 INFO L93 Difference]: Finished difference Result 8193 states and 20486 transitions. [2021-07-13 19:13:55,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:55,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:55,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:55,034 INFO L225 Difference]: With dead ends: 8193 [2021-07-13 19:13:55,034 INFO L226 Difference]: Without dead ends: 8169 [2021-07-13 19:13:55,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2021-07-13 19:13:55,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 6661. [2021-07-13 19:13:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 2.6294294294294294) internal successors, (17512), 6660 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 17512 transitions. [2021-07-13 19:13:55,134 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 17512 transitions. Word has length 47 [2021-07-13 19:13:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:55,134 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 17512 transitions. [2021-07-13 19:13:55,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 17512 transitions. [2021-07-13 19:13:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:55,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:55,140 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:55,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:55,341 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1977681197, now seen corresponding path program 107 times [2021-07-13 19:13:55,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:55,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088333500] [2021-07-13 19:13:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:55,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:55,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088333500] [2021-07-13 19:13:55,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088333500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:55,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165766319] [2021-07-13 19:13:55,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:55,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:13:55,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:55,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:55,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:55,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165766319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:55,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:55,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:13:55,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452492392] [2021-07-13 19:13:55,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:55,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:55,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:55,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:55,504 INFO L87 Difference]: Start difference. First operand 6661 states and 17512 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:55,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:55,922 INFO L93 Difference]: Finished difference Result 8662 states and 21553 transitions. [2021-07-13 19:13:55,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:13:55,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:55,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:55,935 INFO L225 Difference]: With dead ends: 8662 [2021-07-13 19:13:55,935 INFO L226 Difference]: Without dead ends: 8608 [2021-07-13 19:13:55,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2021-07-13 19:13:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 6632. [2021-07-13 19:13:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6632 states, 6631 states have (on average 2.625546674709697) internal successors, (17410), 6631 states have internal predecessors, (17410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6632 states to 6632 states and 17410 transitions. [2021-07-13 19:13:56,034 INFO L78 Accepts]: Start accepts. Automaton has 6632 states and 17410 transitions. Word has length 47 [2021-07-13 19:13:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:56,034 INFO L482 AbstractCegarLoop]: Abstraction has 6632 states and 17410 transitions. [2021-07-13 19:13:56,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:56,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6632 states and 17410 transitions. [2021-07-13 19:13:56,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:56,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:56,040 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:56,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-07-13 19:13:56,241 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:56,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1457344172, now seen corresponding path program 47 times [2021-07-13 19:13:56,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:56,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246041568] [2021-07-13 19:13:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 73 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:56,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:56,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246041568] [2021-07-13 19:13:56,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246041568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:56,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457787335] [2021-07-13 19:13:56,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:56,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:13:56,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:56,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:56,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:56,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457787335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:56,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:56,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 17 [2021-07-13 19:13:56,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295014358] [2021-07-13 19:13:56,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:13:56,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:56,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:13:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:13:56,440 INFO L87 Difference]: Start difference. First operand 6632 states and 17410 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:56,774 INFO L93 Difference]: Finished difference Result 10971 states and 26933 transitions. [2021-07-13 19:13:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:13:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:56,791 INFO L225 Difference]: With dead ends: 10971 [2021-07-13 19:13:56,791 INFO L226 Difference]: Without dead ends: 10971 [2021-07-13 19:13:56,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:13:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-07-13 19:13:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 6822. [2021-07-13 19:13:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.637443190148072) internal successors, (17990), 6821 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:56,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17990 transitions. [2021-07-13 19:13:56,916 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17990 transitions. Word has length 47 [2021-07-13 19:13:56,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:56,916 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17990 transitions. [2021-07-13 19:13:56,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:56,916 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17990 transitions. [2021-07-13 19:13:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:56,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:56,923 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:57,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:57,123 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:57,123 INFO L82 PathProgramCache]: Analyzing trace with hash -180228284, now seen corresponding path program 48 times [2021-07-13 19:13:57,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:57,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426259235] [2021-07-13 19:13:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:57,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426259235] [2021-07-13 19:13:57,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426259235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150061644] [2021-07-13 19:13:57,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:57,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:13:57,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:57,272 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:57,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150061644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:57,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:57,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:13:57,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898283571] [2021-07-13 19:13:57,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:57,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:57,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:57,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:57,272 INFO L87 Difference]: Start difference. First operand 6822 states and 17990 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:57,574 INFO L93 Difference]: Finished difference Result 10273 states and 25277 transitions. [2021-07-13 19:13:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:13:57,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:57,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:57,589 INFO L225 Difference]: With dead ends: 10273 [2021-07-13 19:13:57,589 INFO L226 Difference]: Without dead ends: 10273 [2021-07-13 19:13:57,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:57,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10273 states. [2021-07-13 19:13:57,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10273 to 6822. [2021-07-13 19:13:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.6365635537311243) internal successors, (17984), 6821 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:57,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17984 transitions. [2021-07-13 19:13:57,700 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17984 transitions. Word has length 47 [2021-07-13 19:13:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:57,700 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17984 transitions. [2021-07-13 19:13:57,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17984 transitions. [2021-07-13 19:13:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:57,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:57,706 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:57,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:57,907 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1870223448, now seen corresponding path program 49 times [2021-07-13 19:13:57,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:57,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790395905] [2021-07-13 19:13:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:57,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:57,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790395905] [2021-07-13 19:13:57,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790395905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:57,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409150312] [2021-07-13 19:13:57,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:58,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:58,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:58,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409150312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:58,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:58,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:13:58,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005765756] [2021-07-13 19:13:58,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:58,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:58,072 INFO L87 Difference]: Start difference. First operand 6822 states and 17984 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:58,291 INFO L93 Difference]: Finished difference Result 8962 states and 22325 transitions. [2021-07-13 19:13:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:58,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:58,305 INFO L225 Difference]: With dead ends: 8962 [2021-07-13 19:13:58,305 INFO L226 Difference]: Without dead ends: 8962 [2021-07-13 19:13:58,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:13:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-07-13 19:13:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 6635. [2021-07-13 19:13:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.635061802833886) internal successors, (17481), 6634 states have internal predecessors, (17481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:58,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17481 transitions. [2021-07-13 19:13:58,419 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17481 transitions. Word has length 47 [2021-07-13 19:13:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:58,419 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17481 transitions. [2021-07-13 19:13:58,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17481 transitions. [2021-07-13 19:13:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:58,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:58,425 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:58,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-07-13 19:13:58,626 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:58,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:58,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1591078520, now seen corresponding path program 108 times [2021-07-13 19:13:58,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:58,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212322132] [2021-07-13 19:13:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:58,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:58,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212322132] [2021-07-13 19:13:58,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212322132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:58,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220379250] [2021-07-13 19:13:58,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:58,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:13:58,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:58,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:58,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:58,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220379250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:58,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:58,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:13:58,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063956268] [2021-07-13 19:13:58,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:58,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:58,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:58,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:58,784 INFO L87 Difference]: Start difference. First operand 6635 states and 17481 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:58,985 INFO L93 Difference]: Finished difference Result 7750 states and 19446 transitions. [2021-07-13 19:13:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:58,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:58,996 INFO L225 Difference]: With dead ends: 7750 [2021-07-13 19:13:58,996 INFO L226 Difference]: Without dead ends: 7723 [2021-07-13 19:13:58,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:13:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-07-13 19:13:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 6635. [2021-07-13 19:13:59,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.6341573711184805) internal successors, (17475), 6634 states have internal predecessors, (17475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17475 transitions. [2021-07-13 19:13:59,094 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17475 transitions. Word has length 47 [2021-07-13 19:13:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:59,094 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17475 transitions. [2021-07-13 19:13:59,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17475 transitions. [2021-07-13 19:13:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:59,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:59,100 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:59,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:59,300 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash 890204437, now seen corresponding path program 50 times [2021-07-13 19:13:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:59,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546224027] [2021-07-13 19:13:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:59,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:59,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546224027] [2021-07-13 19:13:59,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546224027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:59,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720479065] [2021-07-13 19:13:59,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:59,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:59,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:59,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:59,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:13:59,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720479065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:59,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:59,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:13:59,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143721461] [2021-07-13 19:13:59,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:13:59,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:59,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:13:59,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:13:59,459 INFO L87 Difference]: Start difference. First operand 6635 states and 17475 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:59,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:59,802 INFO L93 Difference]: Finished difference Result 7795 states and 19769 transitions. [2021-07-13 19:13:59,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:59,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:13:59,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:59,813 INFO L225 Difference]: With dead ends: 7795 [2021-07-13 19:13:59,814 INFO L226 Difference]: Without dead ends: 7771 [2021-07-13 19:13:59,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-07-13 19:13:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6763. [2021-07-13 19:13:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 2.6302868973676428) internal successors, (17786), 6762 states have internal predecessors, (17786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:59,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 17786 transitions. [2021-07-13 19:13:59,913 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 17786 transitions. Word has length 47 [2021-07-13 19:13:59,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:59,914 INFO L482 AbstractCegarLoop]: Abstraction has 6763 states and 17786 transitions. [2021-07-13 19:13:59,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 17786 transitions. [2021-07-13 19:13:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:13:59,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:59,920 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:00,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-07-13 19:14:00,120 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash -663492420, now seen corresponding path program 109 times [2021-07-13 19:14:00,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:00,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381502883] [2021-07-13 19:14:00,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:14:00,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:00,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381502883] [2021-07-13 19:14:00,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381502883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:00,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911971463] [2021-07-13 19:14:00,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:00,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:00,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:14:00,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911971463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:00,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:00,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:14:00,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117987678] [2021-07-13 19:14:00,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:00,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:00,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:00,250 INFO L87 Difference]: Start difference. First operand 6763 states and 17786 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:00,386 INFO L93 Difference]: Finished difference Result 8122 states and 20221 transitions. [2021-07-13 19:14:00,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:14:00,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:00,397 INFO L225 Difference]: With dead ends: 8122 [2021-07-13 19:14:00,397 INFO L226 Difference]: Without dead ends: 8119 [2021-07-13 19:14:00,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:00,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8119 states. [2021-07-13 19:14:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8119 to 6755. [2021-07-13 19:14:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.628368374296713) internal successors, (17752), 6754 states have internal predecessors, (17752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17752 transitions. [2021-07-13 19:14:00,495 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17752 transitions. Word has length 47 [2021-07-13 19:14:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:00,495 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17752 transitions. [2021-07-13 19:14:00,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17752 transitions. [2021-07-13 19:14:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:00,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:00,501 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:00,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:00,701 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:00,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:00,702 INFO L82 PathProgramCache]: Analyzing trace with hash -456429854, now seen corresponding path program 110 times [2021-07-13 19:14:00,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:00,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543331575] [2021-07-13 19:14:00,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:14:00,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:00,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543331575] [2021-07-13 19:14:00,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543331575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:00,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104900246] [2021-07-13 19:14:00,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:00,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:00,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:00,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:14:00,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104900246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:00,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:00,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:14:00,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836052243] [2021-07-13 19:14:00,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:00,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:00,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:00,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:00,862 INFO L87 Difference]: Start difference. First operand 6755 states and 17752 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:01,029 INFO L93 Difference]: Finished difference Result 8150 states and 20236 transitions. [2021-07-13 19:14:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:01,040 INFO L225 Difference]: With dead ends: 8150 [2021-07-13 19:14:01,040 INFO L226 Difference]: Without dead ends: 8132 [2021-07-13 19:14:01,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:01,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-07-13 19:14:01,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 6755. [2021-07-13 19:14:01,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.6254071661237783) internal successors, (17732), 6754 states have internal predecessors, (17732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17732 transitions. [2021-07-13 19:14:01,143 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17732 transitions. Word has length 47 [2021-07-13 19:14:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:01,144 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17732 transitions. [2021-07-13 19:14:01,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17732 transitions. [2021-07-13 19:14:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:01,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:01,150 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:01,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-13 19:14:01,350 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:01,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1904429867, now seen corresponding path program 111 times [2021-07-13 19:14:01,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:01,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094642899] [2021-07-13 19:14:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:01,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:01,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094642899] [2021-07-13 19:14:01,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094642899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:01,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695792103] [2021-07-13 19:14:01,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:01,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 19:14:01,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:01,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:01,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:01,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695792103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:01,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:01,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:14:01,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066792135] [2021-07-13 19:14:01,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:01,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:01,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:01,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:01,527 INFO L87 Difference]: Start difference. First operand 6755 states and 17732 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:01,959 INFO L93 Difference]: Finished difference Result 7412 states and 18888 transitions. [2021-07-13 19:14:01,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:01,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:01,969 INFO L225 Difference]: With dead ends: 7412 [2021-07-13 19:14:01,970 INFO L226 Difference]: Without dead ends: 7338 [2021-07-13 19:14:01,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:01,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2021-07-13 19:14:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 6729. [2021-07-13 19:14:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6729 states, 6728 states have (on average 2.6211355529131986) internal successors, (17635), 6728 states have internal predecessors, (17635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:02,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17635 transitions. [2021-07-13 19:14:02,062 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17635 transitions. Word has length 47 [2021-07-13 19:14:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:02,062 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17635 transitions. [2021-07-13 19:14:02,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17635 transitions. [2021-07-13 19:14:02,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:02,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:02,068 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:02,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-07-13 19:14:02,268 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:02,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1777001249, now seen corresponding path program 112 times [2021-07-13 19:14:02,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:02,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325785243] [2021-07-13 19:14:02,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:14:02,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:02,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325785243] [2021-07-13 19:14:02,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325785243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:02,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362358837] [2021-07-13 19:14:02,335 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:02,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:02,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:02,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:14:02,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362358837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:02,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:02,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:14:02,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552397587] [2021-07-13 19:14:02,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:02,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:02,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:02,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:02,424 INFO L87 Difference]: Start difference. First operand 6729 states and 17635 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:02,737 INFO L93 Difference]: Finished difference Result 7761 states and 19651 transitions. [2021-07-13 19:14:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:02,737 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:02,748 INFO L225 Difference]: With dead ends: 7761 [2021-07-13 19:14:02,749 INFO L226 Difference]: Without dead ends: 7749 [2021-07-13 19:14:02,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:02,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-07-13 19:14:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 6765. [2021-07-13 19:14:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 2.6197516262566527) internal successors, (17720), 6764 states have internal predecessors, (17720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:02,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 17720 transitions. [2021-07-13 19:14:02,850 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 17720 transitions. Word has length 47 [2021-07-13 19:14:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:02,850 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 17720 transitions. [2021-07-13 19:14:02,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 17720 transitions. [2021-07-13 19:14:02,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:02,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:02,856 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:03,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:03,056 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash -376048713, now seen corresponding path program 113 times [2021-07-13 19:14:03,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:03,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547737967] [2021-07-13 19:14:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:03,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547737967] [2021-07-13 19:14:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547737967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593654043] [2021-07-13 19:14:03,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:03,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 19:14:03,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:03,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:03,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593654043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:03,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:03,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:14:03,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794604208] [2021-07-13 19:14:03,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:03,255 INFO L87 Difference]: Start difference. First operand 6765 states and 17720 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:03,678 INFO L93 Difference]: Finished difference Result 8961 states and 22249 transitions. [2021-07-13 19:14:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:14:03,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:03,692 INFO L225 Difference]: With dead ends: 8961 [2021-07-13 19:14:03,692 INFO L226 Difference]: Without dead ends: 8907 [2021-07-13 19:14:03,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:14:03,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-07-13 19:14:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 6885. [2021-07-13 19:14:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6884 states have (on average 2.6198431144683325) internal successors, (18035), 6884 states have internal predecessors, (18035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18035 transitions. [2021-07-13 19:14:03,808 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18035 transitions. Word has length 47 [2021-07-13 19:14:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:03,808 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18035 transitions. [2021-07-13 19:14:03,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18035 transitions. [2021-07-13 19:14:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:03,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:03,814 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:04,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:04,015 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1156510396, now seen corresponding path program 114 times [2021-07-13 19:14:04,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:04,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651792260] [2021-07-13 19:14:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:04,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:04,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651792260] [2021-07-13 19:14:04,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651792260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216136457] [2021-07-13 19:14:04,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:04,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:14:04,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:04,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:04,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:04,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216136457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:04,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:14:04,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532847330] [2021-07-13 19:14:04,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:04,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:04,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:04,192 INFO L87 Difference]: Start difference. First operand 6885 states and 18035 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:04,344 INFO L93 Difference]: Finished difference Result 8306 states and 20557 transitions. [2021-07-13 19:14:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:04,355 INFO L225 Difference]: With dead ends: 8306 [2021-07-13 19:14:04,355 INFO L226 Difference]: Without dead ends: 8282 [2021-07-13 19:14:04,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8282 states. [2021-07-13 19:14:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8282 to 6885. [2021-07-13 19:14:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6884 states have (on average 2.6178094131319) internal successors, (18021), 6884 states have internal predecessors, (18021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:04,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18021 transitions. [2021-07-13 19:14:04,457 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18021 transitions. Word has length 47 [2021-07-13 19:14:04,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:04,457 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18021 transitions. [2021-07-13 19:14:04,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18021 transitions. [2021-07-13 19:14:04,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:04,463 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:04,463 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:04,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:04,664 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:04,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:04,664 INFO L82 PathProgramCache]: Analyzing trace with hash -221212179, now seen corresponding path program 115 times [2021-07-13 19:14:04,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:04,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905654432] [2021-07-13 19:14:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:04,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:04,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905654432] [2021-07-13 19:14:04,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905654432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689552523] [2021-07-13 19:14:04,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:04,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:04,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:04,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689552523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:04,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:14:04,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082524288] [2021-07-13 19:14:04,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:14:04,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:04,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:14:04,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:04,825 INFO L87 Difference]: Start difference. First operand 6885 states and 18021 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:05,427 INFO L93 Difference]: Finished difference Result 10707 states and 26088 transitions. [2021-07-13 19:14:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:14:05,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:05,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:05,444 INFO L225 Difference]: With dead ends: 10707 [2021-07-13 19:14:05,444 INFO L226 Difference]: Without dead ends: 10593 [2021-07-13 19:14:05,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:14:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10593 states. [2021-07-13 19:14:05,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10593 to 7009. [2021-07-13 19:14:05,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 7008 states have (on average 2.617865296803653) internal successors, (18346), 7008 states have internal predecessors, (18346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 18346 transitions. [2021-07-13 19:14:05,581 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 18346 transitions. Word has length 47 [2021-07-13 19:14:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:05,582 INFO L482 AbstractCegarLoop]: Abstraction has 7009 states and 18346 transitions. [2021-07-13 19:14:05,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 18346 transitions. [2021-07-13 19:14:05,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:05,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:05,589 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:05,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-13 19:14:05,789 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:05,789 INFO L82 PathProgramCache]: Analyzing trace with hash 165390498, now seen corresponding path program 116 times [2021-07-13 19:14:05,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:05,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695826530] [2021-07-13 19:14:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:05,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695826530] [2021-07-13 19:14:05,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695826530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781450755] [2021-07-13 19:14:05,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:05,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:05,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:05,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:05,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781450755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:05,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:05,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:14:05,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275781541] [2021-07-13 19:14:05,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:14:05,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:05,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:14:05,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:05,976 INFO L87 Difference]: Start difference. First operand 7009 states and 18346 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:06,142 INFO L93 Difference]: Finished difference Result 8467 states and 20934 transitions. [2021-07-13 19:14:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:06,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:06,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:06,156 INFO L225 Difference]: With dead ends: 8467 [2021-07-13 19:14:06,156 INFO L226 Difference]: Without dead ends: 8434 [2021-07-13 19:14:06,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2021-07-13 19:14:06,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 6781. [2021-07-13 19:14:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.6073746312684367) internal successors, (17678), 6780 states have internal predecessors, (17678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 17678 transitions. [2021-07-13 19:14:06,262 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 17678 transitions. Word has length 47 [2021-07-13 19:14:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:06,262 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 17678 transitions. [2021-07-13 19:14:06,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 17678 transitions. [2021-07-13 19:14:06,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:06,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:06,268 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:06,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-13 19:14:06,468 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:06,469 INFO L82 PathProgramCache]: Analyzing trace with hash -280903689, now seen corresponding path program 117 times [2021-07-13 19:14:06,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:06,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624308895] [2021-07-13 19:14:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:06,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:06,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624308895] [2021-07-13 19:14:06,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624308895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:06,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129160290] [2021-07-13 19:14:06,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:06,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:14:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:06,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:06,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129160290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:06,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:06,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:14:06,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493227734] [2021-07-13 19:14:06,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:06,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:06,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:06,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:06,653 INFO L87 Difference]: Start difference. First operand 6781 states and 17678 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:07,153 INFO L93 Difference]: Finished difference Result 9528 states and 23213 transitions. [2021-07-13 19:14:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:14:07,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:07,167 INFO L225 Difference]: With dead ends: 9528 [2021-07-13 19:14:07,167 INFO L226 Difference]: Without dead ends: 9372 [2021-07-13 19:14:07,168 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:14:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2021-07-13 19:14:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 6516. [2021-07-13 19:14:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6516 states, 6515 states have (on average 2.6015349194167308) internal successors, (16949), 6515 states have internal predecessors, (16949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6516 states to 6516 states and 16949 transitions. [2021-07-13 19:14:07,278 INFO L78 Accepts]: Start accepts. Automaton has 6516 states and 16949 transitions. Word has length 47 [2021-07-13 19:14:07,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:07,278 INFO L482 AbstractCegarLoop]: Abstraction has 6516 states and 16949 transitions. [2021-07-13 19:14:07,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,279 INFO L276 IsEmpty]: Start isEmpty. Operand 6516 states and 16949 transitions. [2021-07-13 19:14:07,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:07,285 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:07,285 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:07,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:07,485 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:07,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:07,485 INFO L82 PathProgramCache]: Analyzing trace with hash -518965206, now seen corresponding path program 51 times [2021-07-13 19:14:07,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:07,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777094727] [2021-07-13 19:14:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:07,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:07,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777094727] [2021-07-13 19:14:07,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777094727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:07,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557299740] [2021-07-13 19:14:07,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:07,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:14:07,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:07,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:07,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:07,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557299740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:07,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:07,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:14:07,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209558943] [2021-07-13 19:14:07,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:07,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:07,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:07,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:07,637 INFO L87 Difference]: Start difference. First operand 6516 states and 16949 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:07,823 INFO L93 Difference]: Finished difference Result 8372 states and 20874 transitions. [2021-07-13 19:14:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:07,838 INFO L225 Difference]: With dead ends: 8372 [2021-07-13 19:14:07,838 INFO L226 Difference]: Without dead ends: 8356 [2021-07-13 19:14:07,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-07-13 19:14:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 6760. [2021-07-13 19:14:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 6759 states have (on average 2.6057109039798787) internal successors, (17612), 6759 states have internal predecessors, (17612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 17612 transitions. [2021-07-13 19:14:07,952 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 17612 transitions. Word has length 47 [2021-07-13 19:14:07,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:07,952 INFO L482 AbstractCegarLoop]: Abstraction has 6760 states and 17612 transitions. [2021-07-13 19:14:07,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 17612 transitions. [2021-07-13 19:14:07,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:07,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:07,958 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:08,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-07-13 19:14:08,159 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:08,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:08,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1140845616, now seen corresponding path program 52 times [2021-07-13 19:14:08,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:08,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23828684] [2021-07-13 19:14:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:08,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:08,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23828684] [2021-07-13 19:14:08,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23828684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:08,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462934690] [2021-07-13 19:14:08,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:08,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:08,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:08,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:08,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:08,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462934690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:08,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:08,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:14:08,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923788061] [2021-07-13 19:14:08,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:08,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:08,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:08,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:08,316 INFO L87 Difference]: Start difference. First operand 6760 states and 17612 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:08,510 INFO L93 Difference]: Finished difference Result 10200 states and 25050 transitions. [2021-07-13 19:14:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:08,527 INFO L225 Difference]: With dead ends: 10200 [2021-07-13 19:14:08,528 INFO L226 Difference]: Without dead ends: 10200 [2021-07-13 19:14:08,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10200 states. [2021-07-13 19:14:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10200 to 6771. [2021-07-13 19:14:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6771 states, 6770 states have (on average 2.606351550960118) internal successors, (17645), 6770 states have internal predecessors, (17645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6771 states to 6771 states and 17645 transitions. [2021-07-13 19:14:08,659 INFO L78 Accepts]: Start accepts. Automaton has 6771 states and 17645 transitions. Word has length 47 [2021-07-13 19:14:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:08,660 INFO L482 AbstractCegarLoop]: Abstraction has 6771 states and 17645 transitions. [2021-07-13 19:14:08,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6771 states and 17645 transitions. [2021-07-13 19:14:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:08,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:08,666 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:08,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-07-13 19:14:08,866 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:08,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:08,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1516549224, now seen corresponding path program 53 times [2021-07-13 19:14:08,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:08,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419552039] [2021-07-13 19:14:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:08,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:08,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419552039] [2021-07-13 19:14:08,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419552039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:08,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633812927] [2021-07-13 19:14:08,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:08,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:14:08,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:08,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:08,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:09,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633812927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:09,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:09,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 19 [2021-07-13 19:14:09,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315482787] [2021-07-13 19:14:09,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:14:09,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:09,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:14:09,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:09,100 INFO L87 Difference]: Start difference. First operand 6771 states and 17645 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:09,565 INFO L93 Difference]: Finished difference Result 11339 states and 27631 transitions. [2021-07-13 19:14:09,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:14:09,565 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:09,582 INFO L225 Difference]: With dead ends: 11339 [2021-07-13 19:14:09,582 INFO L226 Difference]: Without dead ends: 11339 [2021-07-13 19:14:09,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=369, Invalid=623, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:14:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2021-07-13 19:14:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 6800. [2021-07-13 19:14:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6800 states, 6799 states have (on average 2.6087659949992648) internal successors, (17737), 6799 states have internal predecessors, (17737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6800 states to 6800 states and 17737 transitions. [2021-07-13 19:14:09,709 INFO L78 Accepts]: Start accepts. Automaton has 6800 states and 17737 transitions. Word has length 47 [2021-07-13 19:14:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:09,709 INFO L482 AbstractCegarLoop]: Abstraction has 6800 states and 17737 transitions. [2021-07-13 19:14:09,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 6800 states and 17737 transitions. [2021-07-13 19:14:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:09,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:09,715 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:09,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:09,916 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash -173445940, now seen corresponding path program 54 times [2021-07-13 19:14:09,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:09,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469023519] [2021-07-13 19:14:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:09,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:09,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469023519] [2021-07-13 19:14:09,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469023519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:09,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72163412] [2021-07-13 19:14:09,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:10,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:14:10,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:10,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:10,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:10,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72163412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:10,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:10,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:14:10,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299116362] [2021-07-13 19:14:10,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:10,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:10,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:10,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:10,082 INFO L87 Difference]: Start difference. First operand 6800 states and 17737 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:10,360 INFO L93 Difference]: Finished difference Result 10003 states and 24584 transitions. [2021-07-13 19:14:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:14:10,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:10,375 INFO L225 Difference]: With dead ends: 10003 [2021-07-13 19:14:10,375 INFO L226 Difference]: Without dead ends: 10003 [2021-07-13 19:14:10,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:10,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2021-07-13 19:14:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 6809. [2021-07-13 19:14:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6809 states, 6808 states have (on average 2.608548766157462) internal successors, (17759), 6808 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6809 states to 6809 states and 17759 transitions. [2021-07-13 19:14:10,491 INFO L78 Accepts]: Start accepts. Automaton has 6809 states and 17759 transitions. Word has length 47 [2021-07-13 19:14:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:10,491 INFO L482 AbstractCegarLoop]: Abstraction has 6809 states and 17759 transitions. [2021-07-13 19:14:10,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6809 states and 17759 transitions. [2021-07-13 19:14:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:10,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:10,497 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:10,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-13 19:14:10,698 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:10,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:10,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1212732952, now seen corresponding path program 55 times [2021-07-13 19:14:10,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:10,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749945777] [2021-07-13 19:14:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:10,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:10,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749945777] [2021-07-13 19:14:10,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749945777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:10,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205215011] [2021-07-13 19:14:10,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:10,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:10,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205215011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:10,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:10,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:14:10,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330905274] [2021-07-13 19:14:10,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:10,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:10,872 INFO L87 Difference]: Start difference. First operand 6809 states and 17759 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:11,159 INFO L93 Difference]: Finished difference Result 8634 states and 21474 transitions. [2021-07-13 19:14:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:11,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:11,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:11,172 INFO L225 Difference]: With dead ends: 8634 [2021-07-13 19:14:11,172 INFO L226 Difference]: Without dead ends: 8634 [2021-07-13 19:14:11,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:11,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8634 states. [2021-07-13 19:14:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8634 to 6442. [2021-07-13 19:14:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6441 states have (on average 2.6028566992702995) internal successors, (16765), 6441 states have internal predecessors, (16765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16765 transitions. [2021-07-13 19:14:11,271 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16765 transitions. Word has length 47 [2021-07-13 19:14:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:11,271 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16765 transitions. [2021-07-13 19:14:11,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16765 transitions. [2021-07-13 19:14:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:11,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:11,312 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:11,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-13 19:14:11,513 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1612669180, now seen corresponding path program 118 times [2021-07-13 19:14:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:11,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469492891] [2021-07-13 19:14:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:11,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:11,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469492891] [2021-07-13 19:14:11,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469492891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008674923] [2021-07-13 19:14:11,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:11,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:11,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:11,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:11,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:11,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008674923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:11,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:14:11,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644336643] [2021-07-13 19:14:11,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:11,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:11,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:11,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:11,691 INFO L87 Difference]: Start difference. First operand 6442 states and 16765 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:11,885 INFO L93 Difference]: Finished difference Result 7636 states and 18887 transitions. [2021-07-13 19:14:11,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:11,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:11,895 INFO L225 Difference]: With dead ends: 7636 [2021-07-13 19:14:11,895 INFO L226 Difference]: Without dead ends: 7600 [2021-07-13 19:14:11,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2021-07-13 19:14:11,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 6442. [2021-07-13 19:14:11,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6441 states have (on average 2.60192516689955) internal successors, (16759), 6441 states have internal predecessors, (16759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16759 transitions. [2021-07-13 19:14:11,985 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16759 transitions. Word has length 47 [2021-07-13 19:14:11,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:11,985 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16759 transitions. [2021-07-13 19:14:11,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:11,985 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16759 transitions. [2021-07-13 19:14:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:11,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:11,990 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:12,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-07-13 19:14:12,191 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:12,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:12,191 INFO L82 PathProgramCache]: Analyzing trace with hash -2022814789, now seen corresponding path program 56 times [2021-07-13 19:14:12,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:12,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129430237] [2021-07-13 19:14:12,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:12,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:12,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129430237] [2021-07-13 19:14:12,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129430237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:12,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865814383] [2021-07-13 19:14:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:12,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:12,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:12,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:12,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865814383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:12,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:12,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:14:12,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712735789] [2021-07-13 19:14:12,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:12,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:12,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:12,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:12,357 INFO L87 Difference]: Start difference. First operand 6442 states and 16759 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:12,700 INFO L93 Difference]: Finished difference Result 7550 states and 18942 transitions. [2021-07-13 19:14:12,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:12,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:12,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:12,712 INFO L225 Difference]: With dead ends: 7550 [2021-07-13 19:14:12,713 INFO L226 Difference]: Without dead ends: 7535 [2021-07-13 19:14:12,713 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2021-07-13 19:14:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 6598. [2021-07-13 19:14:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6598 states, 6597 states have (on average 2.5970895861755343) internal successors, (17133), 6597 states have internal predecessors, (17133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 17133 transitions. [2021-07-13 19:14:12,800 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 17133 transitions. Word has length 47 [2021-07-13 19:14:12,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:12,800 INFO L482 AbstractCegarLoop]: Abstraction has 6598 states and 17133 transitions. [2021-07-13 19:14:12,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 17133 transitions. [2021-07-13 19:14:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:12,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:12,805 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:13,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:13,005 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:13,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:13,006 INFO L82 PathProgramCache]: Analyzing trace with hash -522481797, now seen corresponding path program 119 times [2021-07-13 19:14:13,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:13,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718478071] [2021-07-13 19:14:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:13,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:13,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718478071] [2021-07-13 19:14:13,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718478071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:13,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597539892] [2021-07-13 19:14:13,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:13,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:14:13,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:13,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:13,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:13,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597539892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:13,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:13,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:14:13,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024235995] [2021-07-13 19:14:13,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:13,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:13,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:13,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:13,167 INFO L87 Difference]: Start difference. First operand 6598 states and 17133 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:13,612 INFO L93 Difference]: Finished difference Result 7269 states and 18302 transitions. [2021-07-13 19:14:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:13,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:13,622 INFO L225 Difference]: With dead ends: 7269 [2021-07-13 19:14:13,622 INFO L226 Difference]: Without dead ends: 7177 [2021-07-13 19:14:13,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:13,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2021-07-13 19:14:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 6587. [2021-07-13 19:14:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6587 states, 6586 states have (on average 2.5889766170665047) internal successors, (17051), 6586 states have internal predecessors, (17051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 17051 transitions. [2021-07-13 19:14:13,713 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 17051 transitions. Word has length 47 [2021-07-13 19:14:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:13,713 INFO L482 AbstractCegarLoop]: Abstraction has 6587 states and 17051 transitions. [2021-07-13 19:14:13,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 17051 transitions. [2021-07-13 19:14:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:13,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:13,719 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:13,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-07-13 19:14:13,919 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:13,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:13,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1136017977, now seen corresponding path program 120 times [2021-07-13 19:14:13,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:13,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480794039] [2021-07-13 19:14:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:14:13,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:13,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480794039] [2021-07-13 19:14:13,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480794039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:13,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159412199] [2021-07-13 19:14:13,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:14,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:14:14,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:14,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:14,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:14:14,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159412199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:14,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:14:14,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007753753] [2021-07-13 19:14:14,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:14,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:14,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:14,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:14,075 INFO L87 Difference]: Start difference. First operand 6587 states and 17051 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:14,405 INFO L93 Difference]: Finished difference Result 7638 states and 19101 transitions. [2021-07-13 19:14:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:14,417 INFO L225 Difference]: With dead ends: 7638 [2021-07-13 19:14:14,417 INFO L226 Difference]: Without dead ends: 7626 [2021-07-13 19:14:14,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:14,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-07-13 19:14:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6635. [2021-07-13 19:14:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.588182092252035) internal successors, (17170), 6634 states have internal predecessors, (17170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:14,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17170 transitions. [2021-07-13 19:14:14,517 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17170 transitions. Word has length 47 [2021-07-13 19:14:14,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:14,518 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17170 transitions. [2021-07-13 19:14:14,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17170 transitions. [2021-07-13 19:14:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:14,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:14,524 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:14,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-13 19:14:14,724 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:14,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1293317464, now seen corresponding path program 57 times [2021-07-13 19:14:14,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:14,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212232948] [2021-07-13 19:14:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:14,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:14,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212232948] [2021-07-13 19:14:14,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212232948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360662433] [2021-07-13 19:14:14,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:14,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:14:14,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:14,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:14,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360662433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:14,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:14:14,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624081632] [2021-07-13 19:14:14,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:14,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:14,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:14,865 INFO L87 Difference]: Start difference. First operand 6635 states and 17170 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:15,024 INFO L93 Difference]: Finished difference Result 7955 states and 19893 transitions. [2021-07-13 19:14:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:15,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:15,035 INFO L225 Difference]: With dead ends: 7955 [2021-07-13 19:14:15,036 INFO L226 Difference]: Without dead ends: 7935 [2021-07-13 19:14:15,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:15,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2021-07-13 19:14:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 6729. [2021-07-13 19:14:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6729 states, 6728 states have (on average 2.581004756242568) internal successors, (17365), 6728 states have internal predecessors, (17365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17365 transitions. [2021-07-13 19:14:15,131 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17365 transitions. Word has length 47 [2021-07-13 19:14:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:15,131 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17365 transitions. [2021-07-13 19:14:15,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17365 transitions. [2021-07-13 19:14:15,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:15,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:15,137 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:15,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-13 19:14:15,338 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1510591816, now seen corresponding path program 121 times [2021-07-13 19:14:15,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:15,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078192084] [2021-07-13 19:14:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:15,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:15,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078192084] [2021-07-13 19:14:15,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078192084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:15,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432834860] [2021-07-13 19:14:15,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:15,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:15,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:15,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432834860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:15,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:15,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:14:15,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152218102] [2021-07-13 19:14:15,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:15,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:15,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:15,470 INFO L87 Difference]: Start difference. First operand 6729 states and 17365 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:15,607 INFO L93 Difference]: Finished difference Result 8206 states and 20010 transitions. [2021-07-13 19:14:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:15,608 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:15,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:15,619 INFO L225 Difference]: With dead ends: 8206 [2021-07-13 19:14:15,619 INFO L226 Difference]: Without dead ends: 8188 [2021-07-13 19:14:15,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2021-07-13 19:14:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 6724. [2021-07-13 19:14:15,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 2.5790569686152014) internal successors, (17339), 6723 states have internal predecessors, (17339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 17339 transitions. [2021-07-13 19:14:15,715 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 17339 transitions. Word has length 47 [2021-07-13 19:14:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:15,715 INFO L482 AbstractCegarLoop]: Abstraction has 6724 states and 17339 transitions. [2021-07-13 19:14:15,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 17339 transitions. [2021-07-13 19:14:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:15,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:15,721 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:15,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-07-13 19:14:15,922 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:15,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:15,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1005899357, now seen corresponding path program 122 times [2021-07-13 19:14:15,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:15,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174548409] [2021-07-13 19:14:15,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:15,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:15,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174548409] [2021-07-13 19:14:15,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174548409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:15,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860128403] [2021-07-13 19:14:15,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:16,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:16,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:16,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:16,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:16,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860128403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:16,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:16,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:14:16,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371722656] [2021-07-13 19:14:16,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:16,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:16,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:16,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:16,074 INFO L87 Difference]: Start difference. First operand 6724 states and 17339 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:16,544 INFO L93 Difference]: Finished difference Result 8839 states and 21652 transitions. [2021-07-13 19:14:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:14:16,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:16,557 INFO L225 Difference]: With dead ends: 8839 [2021-07-13 19:14:16,557 INFO L226 Difference]: Without dead ends: 8785 [2021-07-13 19:14:16,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:14:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-07-13 19:14:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 6842. [2021-07-13 19:14:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6841 states have (on average 2.579447449203333) internal successors, (17646), 6841 states have internal predecessors, (17646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17646 transitions. [2021-07-13 19:14:16,667 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17646 transitions. Word has length 47 [2021-07-13 19:14:16,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:16,667 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17646 transitions. [2021-07-13 19:14:16,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17646 transitions. [2021-07-13 19:14:16,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:16,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:16,674 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:16,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:16,874 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:16,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1756508830, now seen corresponding path program 123 times [2021-07-13 19:14:16,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:16,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222316993] [2021-07-13 19:14:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:16,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:16,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222316993] [2021-07-13 19:14:16,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222316993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:16,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140277541] [2021-07-13 19:14:16,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:16,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:14:16,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:16,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:16,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:17,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140277541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:17,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:14:17,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490983622] [2021-07-13 19:14:17,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:17,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:17,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:17,023 INFO L87 Difference]: Start difference. First operand 6842 states and 17646 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:17,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:17,182 INFO L93 Difference]: Finished difference Result 8382 states and 20407 transitions. [2021-07-13 19:14:17,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:17,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:17,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:17,193 INFO L225 Difference]: With dead ends: 8382 [2021-07-13 19:14:17,193 INFO L226 Difference]: Without dead ends: 8358 [2021-07-13 19:14:17,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:17,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-07-13 19:14:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6842. [2021-07-13 19:14:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6841 states have (on average 2.5778394971495397) internal successors, (17635), 6841 states have internal predecessors, (17635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17635 transitions. [2021-07-13 19:14:17,298 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17635 transitions. Word has length 47 [2021-07-13 19:14:17,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:17,298 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17635 transitions. [2021-07-13 19:14:17,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:17,298 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17635 transitions. [2021-07-13 19:14:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:17,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:17,304 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:17,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-07-13 19:14:17,505 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1160735891, now seen corresponding path program 124 times [2021-07-13 19:14:17,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:17,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239496088] [2021-07-13 19:14:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:17,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239496088] [2021-07-13 19:14:17,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239496088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274243460] [2021-07-13 19:14:17,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:17,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:17,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:17,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:17,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:17,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274243460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:17,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:14:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373356655] [2021-07-13 19:14:17,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:14:17,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:17,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:14:17,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:17,695 INFO L87 Difference]: Start difference. First operand 6842 states and 17635 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:18,414 INFO L93 Difference]: Finished difference Result 11528 states and 27416 transitions. [2021-07-13 19:14:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:14:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:18,434 INFO L225 Difference]: With dead ends: 11528 [2021-07-13 19:14:18,434 INFO L226 Difference]: Without dead ends: 11348 [2021-07-13 19:14:18,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:14:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11348 states. [2021-07-13 19:14:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11348 to 7099. [2021-07-13 19:14:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.5736827275288814) internal successors, (18268), 7098 states have internal predecessors, (18268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18268 transitions. [2021-07-13 19:14:18,567 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18268 transitions. Word has length 47 [2021-07-13 19:14:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:18,567 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18268 transitions. [2021-07-13 19:14:18,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18268 transitions. [2021-07-13 19:14:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:18,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:18,574 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:18,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-13 19:14:18,774 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:18,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:18,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1547338568, now seen corresponding path program 125 times [2021-07-13 19:14:18,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:18,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749126087] [2021-07-13 19:14:18,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:18,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:18,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749126087] [2021-07-13 19:14:18,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749126087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:18,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793823510] [2021-07-13 19:14:18,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:18,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:14:18,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:18,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:18,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:18,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793823510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:18,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:18,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-07-13 19:14:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842971458] [2021-07-13 19:14:18,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:18,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:18,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:18,944 INFO L87 Difference]: Start difference. First operand 7099 states and 18268 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:19,156 INFO L93 Difference]: Finished difference Result 8869 states and 21483 transitions. [2021-07-13 19:14:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:19,157 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:19,169 INFO L225 Difference]: With dead ends: 8869 [2021-07-13 19:14:19,169 INFO L226 Difference]: Without dead ends: 8836 [2021-07-13 19:14:19,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-07-13 19:14:19,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 7099. [2021-07-13 19:14:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.5732600732600734) internal successors, (18265), 7098 states have internal predecessors, (18265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18265 transitions. [2021-07-13 19:14:19,271 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18265 transitions. Word has length 47 [2021-07-13 19:14:19,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:19,271 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18265 transitions. [2021-07-13 19:14:19,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18265 transitions. [2021-07-13 19:14:19,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:19,277 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:19,277 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:19,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-07-13 19:14:19,478 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:19,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:19,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1101044381, now seen corresponding path program 126 times [2021-07-13 19:14:19,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:19,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760375940] [2021-07-13 19:14:19,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:19,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:19,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760375940] [2021-07-13 19:14:19,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760375940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:19,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740382576] [2021-07-13 19:14:19,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:19,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 19:14:19,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:19,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:19,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:19,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740382576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:19,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:19,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:14:19,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529152625] [2021-07-13 19:14:19,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:19,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:19,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:19,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:19,651 INFO L87 Difference]: Start difference. First operand 7099 states and 18265 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:20,681 INFO L93 Difference]: Finished difference Result 13900 states and 32512 transitions. [2021-07-13 19:14:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:14:20,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:20,700 INFO L225 Difference]: With dead ends: 13900 [2021-07-13 19:14:20,701 INFO L226 Difference]: Without dead ends: 13624 [2021-07-13 19:14:20,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 19:14:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13624 states. [2021-07-13 19:14:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13624 to 7315. [2021-07-13 19:14:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 2.568635493573968) internal successors, (18787), 7314 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 18787 transitions. [2021-07-13 19:14:20,829 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 18787 transitions. Word has length 47 [2021-07-13 19:14:20,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:20,830 INFO L482 AbstractCegarLoop]: Abstraction has 7315 states and 18787 transitions. [2021-07-13 19:14:20,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 18787 transitions. [2021-07-13 19:14:20,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:20,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:20,835 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:21,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,036 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:21,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1300350046, now seen corresponding path program 127 times [2021-07-13 19:14:21,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:21,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151837833] [2021-07-13 19:14:21,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:21,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:21,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151837833] [2021-07-13 19:14:21,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151837833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266047574] [2021-07-13 19:14:21,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:21,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:21,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266047574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:21,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:14:21,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243468165] [2021-07-13 19:14:21,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:21,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:21,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:21,202 INFO L87 Difference]: Start difference. First operand 7315 states and 18787 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:21,420 INFO L93 Difference]: Finished difference Result 9027 states and 21871 transitions. [2021-07-13 19:14:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:21,434 INFO L225 Difference]: With dead ends: 9027 [2021-07-13 19:14:21,434 INFO L226 Difference]: Without dead ends: 8985 [2021-07-13 19:14:21,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8985 states. [2021-07-13 19:14:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8985 to 7097. [2021-07-13 19:14:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 2.5593291995490417) internal successors, (18161), 7096 states have internal predecessors, (18161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 18161 transitions. [2021-07-13 19:14:21,542 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 18161 transitions. Word has length 47 [2021-07-13 19:14:21,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:21,542 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 18161 transitions. [2021-07-13 19:14:21,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 18161 transitions. [2021-07-13 19:14:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:21,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:21,548 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:21,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,753 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 947730515, now seen corresponding path program 128 times [2021-07-13 19:14:21,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:21,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031472497] [2021-07-13 19:14:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:21,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:21,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031472497] [2021-07-13 19:14:21,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031472497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466908380] [2021-07-13 19:14:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:21,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:21,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:21,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:21,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466908380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:21,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:14:21,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911355373] [2021-07-13 19:14:21,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:21,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:21,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:21,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:21,959 INFO L87 Difference]: Start difference. First operand 7097 states and 18161 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:22,495 INFO L93 Difference]: Finished difference Result 9058 states and 21780 transitions. [2021-07-13 19:14:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:14:22,495 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:22,507 INFO L225 Difference]: With dead ends: 9058 [2021-07-13 19:14:22,507 INFO L226 Difference]: Without dead ends: 8680 [2021-07-13 19:14:22,507 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:14:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-07-13 19:14:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6394. [2021-07-13 19:14:22,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 2.564210855623338) internal successors, (16393), 6393 states have internal predecessors, (16393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 16393 transitions. [2021-07-13 19:14:22,649 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 16393 transitions. Word has length 47 [2021-07-13 19:14:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:22,649 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 16393 transitions. [2021-07-13 19:14:22,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 16393 transitions. [2021-07-13 19:14:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:22,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:22,654 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:22,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:22,855 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:22,855 INFO L82 PathProgramCache]: Analyzing trace with hash 87788588, now seen corresponding path program 58 times [2021-07-13 19:14:22,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:22,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188172497] [2021-07-13 19:14:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:22,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188172497] [2021-07-13 19:14:22,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188172497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:22,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674924118] [2021-07-13 19:14:22,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:22,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:22,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:22,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:22,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:22,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674924118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:22,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:22,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:14:22,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626094952] [2021-07-13 19:14:22,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:22,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:22,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:22,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:22,999 INFO L87 Difference]: Start difference. First operand 6394 states and 16393 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:23,201 INFO L93 Difference]: Finished difference Result 9182 states and 22469 transitions. [2021-07-13 19:14:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:23,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:23,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:23,214 INFO L225 Difference]: With dead ends: 9182 [2021-07-13 19:14:23,214 INFO L226 Difference]: Without dead ends: 9182 [2021-07-13 19:14:23,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9182 states. [2021-07-13 19:14:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9182 to 6584. [2021-07-13 19:14:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 2.5773963238644995) internal successors, (16967), 6583 states have internal predecessors, (16967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 16967 transitions. [2021-07-13 19:14:23,317 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 16967 transitions. Word has length 47 [2021-07-13 19:14:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:23,318 INFO L482 AbstractCegarLoop]: Abstraction has 6584 states and 16967 transitions. [2021-07-13 19:14:23,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 16967 transitions. [2021-07-13 19:14:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:23,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:23,323 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:23,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-13 19:14:23,523 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1549783868, now seen corresponding path program 59 times [2021-07-13 19:14:23,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:23,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316540747] [2021-07-13 19:14:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:23,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:23,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316540747] [2021-07-13 19:14:23,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316540747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:23,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919514535] [2021-07-13 19:14:23,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:23,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 19:14:23,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:23,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:23,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:23,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919514535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:23,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:23,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-07-13 19:14:23,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567541943] [2021-07-13 19:14:23,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:14:23,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:14:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:14:23,801 INFO L87 Difference]: Start difference. First operand 6584 states and 16967 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:24,523 INFO L93 Difference]: Finished difference Result 10546 states and 25434 transitions. [2021-07-13 19:14:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:14:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:24,538 INFO L225 Difference]: With dead ends: 10546 [2021-07-13 19:14:24,538 INFO L226 Difference]: Without dead ends: 10546 [2021-07-13 19:14:24,539 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=568, Invalid=1154, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:14:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10546 states. [2021-07-13 19:14:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10546 to 6608. [2021-07-13 19:14:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6608 states, 6607 states have (on average 2.5784773724837295) internal successors, (17036), 6607 states have internal predecessors, (17036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 17036 transitions. [2021-07-13 19:14:24,655 INFO L78 Accepts]: Start accepts. Automaton has 6608 states and 17036 transitions. Word has length 47 [2021-07-13 19:14:24,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:24,655 INFO L482 AbstractCegarLoop]: Abstraction has 6608 states and 17036 transitions. [2021-07-13 19:14:24,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 6608 states and 17036 transitions. [2021-07-13 19:14:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:24,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:24,661 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:24,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:24,861 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1055188264, now seen corresponding path program 60 times [2021-07-13 19:14:24,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:24,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978175702] [2021-07-13 19:14:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:24,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:24,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978175702] [2021-07-13 19:14:24,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978175702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:24,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290390104] [2021-07-13 19:14:24,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:24,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 19:14:24,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:24,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:24,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:25,028 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:25,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290390104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:25,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:14:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483571396] [2021-07-13 19:14:25,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:25,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:25,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:25,029 INFO L87 Difference]: Start difference. First operand 6608 states and 17036 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:25,339 INFO L93 Difference]: Finished difference Result 9881 states and 24078 transitions. [2021-07-13 19:14:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:14:25,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:25,351 INFO L225 Difference]: With dead ends: 9881 [2021-07-13 19:14:25,352 INFO L226 Difference]: Without dead ends: 9881 [2021-07-13 19:14:25,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:14:25,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2021-07-13 19:14:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 6643. [2021-07-13 19:14:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 6642 states have (on average 2.580246913580247) internal successors, (17138), 6642 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 17138 transitions. [2021-07-13 19:14:25,462 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 17138 transitions. Word has length 47 [2021-07-13 19:14:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:25,462 INFO L482 AbstractCegarLoop]: Abstraction has 6643 states and 17138 transitions. [2021-07-13 19:14:25,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 17138 transitions. [2021-07-13 19:14:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:25,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:25,468 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:25,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:25,669 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash 15901252, now seen corresponding path program 61 times [2021-07-13 19:14:25,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:25,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649941983] [2021-07-13 19:14:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:25,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:25,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649941983] [2021-07-13 19:14:25,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649941983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392001220] [2021-07-13 19:14:25,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:25,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:25,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:25,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392001220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:25,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:14:25,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905679174] [2021-07-13 19:14:25,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:25,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:25,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:25,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:25,848 INFO L87 Difference]: Start difference. First operand 6643 states and 17138 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:26,174 INFO L93 Difference]: Finished difference Result 9085 states and 22271 transitions. [2021-07-13 19:14:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:14:26,174 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:26,187 INFO L225 Difference]: With dead ends: 9085 [2021-07-13 19:14:26,187 INFO L226 Difference]: Without dead ends: 9085 [2021-07-13 19:14:26,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=227, Invalid=373, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:14:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2021-07-13 19:14:26,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 6641. [2021-07-13 19:14:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6641 states, 6640 states have (on average 2.5802710843373493) internal successors, (17133), 6640 states have internal predecessors, (17133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 17133 transitions. [2021-07-13 19:14:26,302 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 17133 transitions. Word has length 47 [2021-07-13 19:14:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:26,302 INFO L482 AbstractCegarLoop]: Abstraction has 6641 states and 17133 transitions. [2021-07-13 19:14:26,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 17133 transitions. [2021-07-13 19:14:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:26,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:26,308 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:26,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:26,509 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:26,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:26,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1035763624, now seen corresponding path program 62 times [2021-07-13 19:14:26,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:26,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177179878] [2021-07-13 19:14:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:26,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:26,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177179878] [2021-07-13 19:14:26,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177179878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:26,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297874477] [2021-07-13 19:14:26,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:26,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:26,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:26,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:26,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:26,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297874477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:26,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:26,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:14:26,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802819435] [2021-07-13 19:14:26,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:26,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:26,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:26,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:26,695 INFO L87 Difference]: Start difference. First operand 6641 states and 17133 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:27,037 INFO L93 Difference]: Finished difference Result 7979 states and 19784 transitions. [2021-07-13 19:14:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:27,049 INFO L225 Difference]: With dead ends: 7979 [2021-07-13 19:14:27,050 INFO L226 Difference]: Without dead ends: 7979 [2021-07-13 19:14:27,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:14:27,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2021-07-13 19:14:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 6178. [2021-07-13 19:14:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6178 states, 6177 states have (on average 2.5810263882143434) internal successors, (15943), 6177 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6178 states to 6178 states and 15943 transitions. [2021-07-13 19:14:27,131 INFO L78 Accepts]: Start accepts. Automaton has 6178 states and 15943 transitions. Word has length 47 [2021-07-13 19:14:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:27,131 INFO L482 AbstractCegarLoop]: Abstraction has 6178 states and 15943 transitions. [2021-07-13 19:14:27,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6178 states and 15943 transitions. [2021-07-13 19:14:27,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:27,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:27,136 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:27,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:27,336 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:27,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:27,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1697148168, now seen corresponding path program 129 times [2021-07-13 19:14:27,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:27,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021388557] [2021-07-13 19:14:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:27,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:27,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021388557] [2021-07-13 19:14:27,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021388557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:27,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443374411] [2021-07-13 19:14:27,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:27,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:14:27,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:27,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:27,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:27,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443374411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:27,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:27,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:14:27,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726724543] [2021-07-13 19:14:27,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:27,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:27,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:27,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:27,531 INFO L87 Difference]: Start difference. First operand 6178 states and 15943 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:27,747 INFO L93 Difference]: Finished difference Result 7415 states and 18154 transitions. [2021-07-13 19:14:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:27,757 INFO L225 Difference]: With dead ends: 7415 [2021-07-13 19:14:27,757 INFO L226 Difference]: Without dead ends: 7370 [2021-07-13 19:14:27,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states. [2021-07-13 19:14:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7370 to 6187. [2021-07-13 19:14:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6187 states, 6186 states have (on average 2.5796960879405106) internal successors, (15958), 6186 states have internal predecessors, (15958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 15958 transitions. [2021-07-13 19:14:27,842 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 15958 transitions. Word has length 47 [2021-07-13 19:14:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:27,842 INFO L482 AbstractCegarLoop]: Abstraction has 6187 states and 15958 transitions. [2021-07-13 19:14:27,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 15958 transitions. [2021-07-13 19:14:27,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:27,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:27,847 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:28,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:28,049 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:28,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:28,049 INFO L82 PathProgramCache]: Analyzing trace with hash -686375646, now seen corresponding path program 130 times [2021-07-13 19:14:28,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:28,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272108478] [2021-07-13 19:14:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:28,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:28,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272108478] [2021-07-13 19:14:28,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272108478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:28,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208905063] [2021-07-13 19:14:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:28,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:28,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:28,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:28,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:28,226 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:28,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208905063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:28,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:28,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:14:28,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119158938] [2021-07-13 19:14:28,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:28,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:28,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:28,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:28,227 INFO L87 Difference]: Start difference. First operand 6187 states and 15958 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:28,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:28,562 INFO L93 Difference]: Finished difference Result 7945 states and 19639 transitions. [2021-07-13 19:14:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:28,575 INFO L225 Difference]: With dead ends: 7945 [2021-07-13 19:14:28,575 INFO L226 Difference]: Without dead ends: 7945 [2021-07-13 19:14:28,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:14:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-07-13 19:14:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 6576. [2021-07-13 19:14:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 2.607148288973384) internal successors, (17142), 6575 states have internal predecessors, (17142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:28,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17142 transitions. [2021-07-13 19:14:28,677 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17142 transitions. Word has length 47 [2021-07-13 19:14:28,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:28,677 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17142 transitions. [2021-07-13 19:14:28,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:28,677 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17142 transitions. [2021-07-13 19:14:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:28,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:28,682 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:28,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-07-13 19:14:28,883 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:28,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1627893973, now seen corresponding path program 63 times [2021-07-13 19:14:28,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:28,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766157947] [2021-07-13 19:14:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:28,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:28,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766157947] [2021-07-13 19:14:28,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766157947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:28,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801520931] [2021-07-13 19:14:28,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:28,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:14:28,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:29,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:29,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801520931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:29,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:29,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:14:29,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803798678] [2021-07-13 19:14:29,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:29,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:29,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:29,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:29,062 INFO L87 Difference]: Start difference. First operand 6576 states and 17142 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:29,496 INFO L93 Difference]: Finished difference Result 9298 states and 22741 transitions. [2021-07-13 19:14:29,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:14:29,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:29,509 INFO L225 Difference]: With dead ends: 9298 [2021-07-13 19:14:29,509 INFO L226 Difference]: Without dead ends: 9166 [2021-07-13 19:14:29,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:14:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2021-07-13 19:14:29,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 6568. [2021-07-13 19:14:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 2.607735647936653) internal successors, (17125), 6567 states have internal predecessors, (17125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17125 transitions. [2021-07-13 19:14:29,611 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17125 transitions. Word has length 47 [2021-07-13 19:14:29,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:29,611 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17125 transitions. [2021-07-13 19:14:29,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17125 transitions. [2021-07-13 19:14:29,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:29,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:29,616 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:29,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:29,817 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:29,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:29,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1148331157, now seen corresponding path program 131 times [2021-07-13 19:14:29,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:29,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362606487] [2021-07-13 19:14:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:29,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:29,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362606487] [2021-07-13 19:14:29,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362606487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:29,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79640046] [2021-07-13 19:14:29,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:29,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:14:29,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:30,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79640046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:30,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:30,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:14:30,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319494153] [2021-07-13 19:14:30,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:30,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:30,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:30,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:30,109 INFO L87 Difference]: Start difference. First operand 6568 states and 17125 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:30,713 INFO L93 Difference]: Finished difference Result 6738 states and 17392 transitions. [2021-07-13 19:14:30,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:30,722 INFO L225 Difference]: With dead ends: 6738 [2021-07-13 19:14:30,722 INFO L226 Difference]: Without dead ends: 6682 [2021-07-13 19:14:30,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 171.0ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:30,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2021-07-13 19:14:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6568. [2021-07-13 19:14:30,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 2.6045378407187454) internal successors, (17104), 6567 states have internal predecessors, (17104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17104 transitions. [2021-07-13 19:14:30,817 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17104 transitions. Word has length 47 [2021-07-13 19:14:30,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:30,818 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17104 transitions. [2021-07-13 19:14:30,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17104 transitions. [2021-07-13 19:14:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:30,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:30,824 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:31,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-07-13 19:14:31,024 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash -759601188, now seen corresponding path program 64 times [2021-07-13 19:14:31,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:31,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388835013] [2021-07-13 19:14:31,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:31,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:31,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388835013] [2021-07-13 19:14:31,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388835013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594972415] [2021-07-13 19:14:31,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:31,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:31,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:31,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:31,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:31,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594972415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:31,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:14:31,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205093959] [2021-07-13 19:14:31,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:31,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:31,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:31,203 INFO L87 Difference]: Start difference. First operand 6568 states and 17104 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:31,425 INFO L93 Difference]: Finished difference Result 8053 states and 20088 transitions. [2021-07-13 19:14:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:31,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:31,435 INFO L225 Difference]: With dead ends: 8053 [2021-07-13 19:14:31,435 INFO L226 Difference]: Without dead ends: 7951 [2021-07-13 19:14:31,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-07-13 19:14:31,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6416. [2021-07-13 19:14:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 6415 states have (on average 2.6084177708495715) internal successors, (16733), 6415 states have internal predecessors, (16733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 16733 transitions. [2021-07-13 19:14:31,522 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 16733 transitions. Word has length 47 [2021-07-13 19:14:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:31,522 INFO L482 AbstractCegarLoop]: Abstraction has 6416 states and 16733 transitions. [2021-07-13 19:14:31,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 16733 transitions. [2021-07-13 19:14:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:31,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:31,527 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:31,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:31,728 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:31,728 INFO L82 PathProgramCache]: Analyzing trace with hash 372425610, now seen corresponding path program 132 times [2021-07-13 19:14:31,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:31,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37086512] [2021-07-13 19:14:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:31,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:31,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37086512] [2021-07-13 19:14:31,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37086512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891318597] [2021-07-13 19:14:31,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:31,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:14:31,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:31,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:14:31,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:31,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891318597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:31,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:14:31,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693559844] [2021-07-13 19:14:31,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:14:31,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:31,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:14:31,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:31,937 INFO L87 Difference]: Start difference. First operand 6416 states and 16733 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:32,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:32,218 INFO L93 Difference]: Finished difference Result 8176 states and 20353 transitions. [2021-07-13 19:14:32,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:14:32,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:32,229 INFO L225 Difference]: With dead ends: 8176 [2021-07-13 19:14:32,229 INFO L226 Difference]: Without dead ends: 8176 [2021-07-13 19:14:32,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:14:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-07-13 19:14:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6714. [2021-07-13 19:14:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6714 states, 6713 states have (on average 2.627588261582005) internal successors, (17639), 6713 states have internal predecessors, (17639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6714 states to 6714 states and 17639 transitions. [2021-07-13 19:14:32,329 INFO L78 Accepts]: Start accepts. Automaton has 6714 states and 17639 transitions. Word has length 47 [2021-07-13 19:14:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:32,329 INFO L482 AbstractCegarLoop]: Abstraction has 6714 states and 17639 transitions. [2021-07-13 19:14:32,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 6714 states and 17639 transitions. [2021-07-13 19:14:32,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:32,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:32,334 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:32,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-13 19:14:32,537 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:32,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:32,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1064796407, now seen corresponding path program 65 times [2021-07-13 19:14:32,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:32,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630899926] [2021-07-13 19:14:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:32,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:32,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630899926] [2021-07-13 19:14:32,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630899926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:32,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726568593] [2021-07-13 19:14:32,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:32,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:14:32,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:32,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726568593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:32,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:32,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:14:32,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545246178] [2021-07-13 19:14:32,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:32,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:32,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:32,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:32,706 INFO L87 Difference]: Start difference. First operand 6714 states and 17639 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:33,104 INFO L93 Difference]: Finished difference Result 8947 states and 22376 transitions. [2021-07-13 19:14:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:14:33,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:33,119 INFO L225 Difference]: With dead ends: 8947 [2021-07-13 19:14:33,119 INFO L226 Difference]: Without dead ends: 8933 [2021-07-13 19:14:33,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:14:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-07-13 19:14:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 6712. [2021-07-13 19:14:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 2.633586648785576) internal successors, (17674), 6711 states have internal predecessors, (17674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17674 transitions. [2021-07-13 19:14:33,231 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17674 transitions. Word has length 47 [2021-07-13 19:14:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:33,231 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17674 transitions. [2021-07-13 19:14:33,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17674 transitions. [2021-07-13 19:14:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:33,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:33,236 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:33,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:33,441 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 902744311, now seen corresponding path program 133 times [2021-07-13 19:14:33,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:33,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794130878] [2021-07-13 19:14:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:33,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:33,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794130878] [2021-07-13 19:14:33,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794130878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:33,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271083714] [2021-07-13 19:14:33,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:33,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271083714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:33,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:33,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-13 19:14:33,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556633251] [2021-07-13 19:14:33,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:33,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:33,706 INFO L87 Difference]: Start difference. First operand 6712 states and 17674 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:34,106 INFO L93 Difference]: Finished difference Result 6816 states and 17833 transitions. [2021-07-13 19:14:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:34,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:34,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:34,116 INFO L225 Difference]: With dead ends: 6816 [2021-07-13 19:14:34,116 INFO L226 Difference]: Without dead ends: 6772 [2021-07-13 19:14:34,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2021-07-13 19:14:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6712. [2021-07-13 19:14:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 2.6322455669795857) internal successors, (17665), 6711 states have internal predecessors, (17665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17665 transitions. [2021-07-13 19:14:34,220 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17665 transitions. Word has length 47 [2021-07-13 19:14:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:34,220 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17665 transitions. [2021-07-13 19:14:34,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17665 transitions. [2021-07-13 19:14:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:34,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:34,225 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:34,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:34,426 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1077953366, now seen corresponding path program 66 times [2021-07-13 19:14:34,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:34,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260773474] [2021-07-13 19:14:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:34,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:34,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260773474] [2021-07-13 19:14:34,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260773474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:34,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936933038] [2021-07-13 19:14:34,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:34,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:14:34,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:34,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:34,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:34,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936933038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:34,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:34,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-07-13 19:14:34,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784996000] [2021-07-13 19:14:34,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:14:34,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:14:34,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:34,609 INFO L87 Difference]: Start difference. First operand 6712 states and 17665 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:34,831 INFO L93 Difference]: Finished difference Result 7827 states and 19871 transitions. [2021-07-13 19:14:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:34,841 INFO L225 Difference]: With dead ends: 7827 [2021-07-13 19:14:34,841 INFO L226 Difference]: Without dead ends: 7773 [2021-07-13 19:14:34,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-07-13 19:14:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 6518. [2021-07-13 19:14:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 2.63265306122449) internal successors, (17157), 6517 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 17157 transitions. [2021-07-13 19:14:34,936 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 17157 transitions. Word has length 47 [2021-07-13 19:14:34,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:34,936 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 17157 transitions. [2021-07-13 19:14:34,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,936 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 17157 transitions. [2021-07-13 19:14:34,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:34,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:34,942 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:35,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:35,142 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1517458978, now seen corresponding path program 134 times [2021-07-13 19:14:35,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:35,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742939987] [2021-07-13 19:14:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:35,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:35,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742939987] [2021-07-13 19:14:35,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742939987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:35,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51421446] [2021-07-13 19:14:35,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:35,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:35,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:35,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:35,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:35,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51421446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:35,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:35,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:14:35,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622327157] [2021-07-13 19:14:35,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:14:35,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:35,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:14:35,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:35,297 INFO L87 Difference]: Start difference. First operand 6518 states and 17157 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:35,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:35,514 INFO L93 Difference]: Finished difference Result 8402 states and 21039 transitions. [2021-07-13 19:14:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:35,531 INFO L225 Difference]: With dead ends: 8402 [2021-07-13 19:14:35,531 INFO L226 Difference]: Without dead ends: 8402 [2021-07-13 19:14:35,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2021-07-13 19:14:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 6836. [2021-07-13 19:14:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 2.651207022677396) internal successors, (18121), 6835 states have internal predecessors, (18121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 18121 transitions. [2021-07-13 19:14:35,637 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 18121 transitions. Word has length 47 [2021-07-13 19:14:35,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:35,637 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 18121 transitions. [2021-07-13 19:14:35,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 18121 transitions. [2021-07-13 19:14:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:35,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:35,642 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:35,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:35,843 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:35,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1223920619, now seen corresponding path program 67 times [2021-07-13 19:14:35,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:35,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749918452] [2021-07-13 19:14:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:35,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749918452] [2021-07-13 19:14:35,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749918452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:35,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057517360] [2021-07-13 19:14:35,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:36,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057517360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:36,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:36,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:14:36,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051500695] [2021-07-13 19:14:36,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:14:36,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:36,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:14:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:36,010 INFO L87 Difference]: Start difference. First operand 6836 states and 18121 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:36,399 INFO L93 Difference]: Finished difference Result 8432 states and 21485 transitions. [2021-07-13 19:14:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:14:36,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:36,410 INFO L225 Difference]: With dead ends: 8432 [2021-07-13 19:14:36,410 INFO L226 Difference]: Without dead ends: 8418 [2021-07-13 19:14:36,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-07-13 19:14:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 6863. [2021-07-13 19:14:36,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6862 states have (on average 2.652287962693092) internal successors, (18200), 6862 states have internal predecessors, (18200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18200 transitions. [2021-07-13 19:14:36,506 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18200 transitions. Word has length 47 [2021-07-13 19:14:36,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:36,506 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18200 transitions. [2021-07-13 19:14:36,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18200 transitions. [2021-07-13 19:14:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:36,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:36,511 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:36,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-07-13 19:14:36,711 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1400811563, now seen corresponding path program 135 times [2021-07-13 19:14:36,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:36,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528695923] [2021-07-13 19:14:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:36,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:36,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528695923] [2021-07-13 19:14:36,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528695923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:36,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934327300] [2021-07-13 19:14:36,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:36,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:14:36,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:36,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:36,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:36,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934327300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:36,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:36,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-13 19:14:36,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752290432] [2021-07-13 19:14:36,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:36,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:36,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:36,935 INFO L87 Difference]: Start difference. First operand 6863 states and 18200 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:37,281 INFO L93 Difference]: Finished difference Result 6912 states and 18275 transitions. [2021-07-13 19:14:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:37,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:37,292 INFO L225 Difference]: With dead ends: 6912 [2021-07-13 19:14:37,292 INFO L226 Difference]: Without dead ends: 6880 [2021-07-13 19:14:37,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2021-07-13 19:14:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6863. [2021-07-13 19:14:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6862 states have (on average 2.6514135820460507) internal successors, (18194), 6862 states have internal predecessors, (18194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18194 transitions. [2021-07-13 19:14:37,387 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18194 transitions. Word has length 47 [2021-07-13 19:14:37,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:37,387 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18194 transitions. [2021-07-13 19:14:37,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18194 transitions. [2021-07-13 19:14:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:37,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:37,392 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:37,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-13 19:14:37,593 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 118327946, now seen corresponding path program 136 times [2021-07-13 19:14:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:37,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534058111] [2021-07-13 19:14:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:37,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:37,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534058111] [2021-07-13 19:14:37,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534058111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:37,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690481869] [2021-07-13 19:14:37,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:37,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:37,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:37,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:14:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:37,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690481869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:37,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:37,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:14:37,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689935524] [2021-07-13 19:14:37,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:37,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:37,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:37,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:37,777 INFO L87 Difference]: Start difference. First operand 6863 states and 18194 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:37,983 INFO L93 Difference]: Finished difference Result 8816 states and 22216 transitions. [2021-07-13 19:14:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:37,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:37,998 INFO L225 Difference]: With dead ends: 8816 [2021-07-13 19:14:37,998 INFO L226 Difference]: Without dead ends: 8816 [2021-07-13 19:14:37,998 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:14:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2021-07-13 19:14:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 7200. [2021-07-13 19:14:38,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 2.6677316293929714) internal successors, (19205), 7199 states have internal predecessors, (19205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 19205 transitions. [2021-07-13 19:14:38,123 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 19205 transitions. Word has length 47 [2021-07-13 19:14:38,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:38,123 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 19205 transitions. [2021-07-13 19:14:38,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 19205 transitions. [2021-07-13 19:14:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:38,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:38,129 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:38,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:38,329 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:38,329 INFO L82 PathProgramCache]: Analyzing trace with hash -652507721, now seen corresponding path program 68 times [2021-07-13 19:14:38,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:38,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080550675] [2021-07-13 19:14:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:38,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:38,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080550675] [2021-07-13 19:14:38,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080550675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:38,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785366001] [2021-07-13 19:14:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:38,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:38,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:38,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:38,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785366001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:38,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:38,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:14:38,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018797583] [2021-07-13 19:14:38,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:38,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:38,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:38,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:38,483 INFO L87 Difference]: Start difference. First operand 7200 states and 19205 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:38,816 INFO L93 Difference]: Finished difference Result 8160 states and 21168 transitions. [2021-07-13 19:14:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:14:38,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:38,829 INFO L225 Difference]: With dead ends: 8160 [2021-07-13 19:14:38,829 INFO L226 Difference]: Without dead ends: 8160 [2021-07-13 19:14:38,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 119.5ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-07-13 19:14:38,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 7218. [2021-07-13 19:14:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.668144658445337) internal successors, (19256), 7217 states have internal predecessors, (19256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19256 transitions. [2021-07-13 19:14:38,925 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19256 transitions. Word has length 47 [2021-07-13 19:14:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:38,925 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19256 transitions. [2021-07-13 19:14:38,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19256 transitions. [2021-07-13 19:14:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:38,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:38,930 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:39,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:39,131 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:39,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:39,131 INFO L82 PathProgramCache]: Analyzing trace with hash 2009163191, now seen corresponding path program 137 times [2021-07-13 19:14:39,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:39,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558755727] [2021-07-13 19:14:39,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:39,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:39,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558755727] [2021-07-13 19:14:39,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558755727] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:39,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075577257] [2021-07-13 19:14:39,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:39,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:14:39,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:39,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:39,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:39,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075577257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:39,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:39,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:14:39,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217447195] [2021-07-13 19:14:39,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:14:39,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:39,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:14:39,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:39,340 INFO L87 Difference]: Start difference. First operand 7218 states and 19256 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:39,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:39,601 INFO L93 Difference]: Finished difference Result 7286 states and 19355 transitions. [2021-07-13 19:14:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:39,611 INFO L225 Difference]: With dead ends: 7286 [2021-07-13 19:14:39,611 INFO L226 Difference]: Without dead ends: 7266 [2021-07-13 19:14:39,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2021-07-13 19:14:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 7218. [2021-07-13 19:14:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.6677289732575864) internal successors, (19253), 7217 states have internal predecessors, (19253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19253 transitions. [2021-07-13 19:14:39,747 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19253 transitions. Word has length 47 [2021-07-13 19:14:39,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:39,747 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19253 transitions. [2021-07-13 19:14:39,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:39,747 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19253 transitions. [2021-07-13 19:14:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:39,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:39,752 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:39,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:39,952 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:39,953 INFO L82 PathProgramCache]: Analyzing trace with hash -732216406, now seen corresponding path program 69 times [2021-07-13 19:14:39,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:39,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421218143] [2021-07-13 19:14:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:40,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:40,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421218143] [2021-07-13 19:14:40,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421218143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:40,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001804203] [2021-07-13 19:14:40,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:40,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:14:40,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:40,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:40,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001804203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:40,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:40,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:14:40,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707019296] [2021-07-13 19:14:40,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:14:40,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:40,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:14:40,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:40,130 INFO L87 Difference]: Start difference. First operand 7218 states and 19253 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:40,309 INFO L93 Difference]: Finished difference Result 7894 states and 20581 transitions. [2021-07-13 19:14:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:40,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:40,320 INFO L225 Difference]: With dead ends: 7894 [2021-07-13 19:14:40,320 INFO L226 Difference]: Without dead ends: 7878 [2021-07-13 19:14:40,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:40,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-07-13 19:14:40,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 7218. [2021-07-13 19:14:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.6667590411528335) internal successors, (19246), 7217 states have internal predecessors, (19246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19246 transitions. [2021-07-13 19:14:40,418 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19246 transitions. Word has length 47 [2021-07-13 19:14:40,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:40,418 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19246 transitions. [2021-07-13 19:14:40,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,418 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19246 transitions. [2021-07-13 19:14:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:40,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:40,423 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:40,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:40,625 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:40,626 INFO L82 PathProgramCache]: Analyzing trace with hash 330606421, now seen corresponding path program 70 times [2021-07-13 19:14:40,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:40,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646119073] [2021-07-13 19:14:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:40,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:40,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646119073] [2021-07-13 19:14:40,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646119073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:40,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674562812] [2021-07-13 19:14:40,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:40,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:40,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:40,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:40,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674562812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:40,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:40,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:14:40,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261335794] [2021-07-13 19:14:40,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:40,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:40,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:40,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:40,782 INFO L87 Difference]: Start difference. First operand 7218 states and 19246 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:41,098 INFO L93 Difference]: Finished difference Result 7863 states and 20502 transitions. [2021-07-13 19:14:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:41,098 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:41,110 INFO L225 Difference]: With dead ends: 7863 [2021-07-13 19:14:41,110 INFO L226 Difference]: Without dead ends: 7855 [2021-07-13 19:14:41,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:41,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-07-13 19:14:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 7285. [2021-07-13 19:14:41,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7285 states, 7284 states have (on average 2.6633717737506863) internal successors, (19400), 7284 states have internal predecessors, (19400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7285 states to 7285 states and 19400 transitions. [2021-07-13 19:14:41,219 INFO L78 Accepts]: Start accepts. Automaton has 7285 states and 19400 transitions. Word has length 47 [2021-07-13 19:14:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:41,220 INFO L482 AbstractCegarLoop]: Abstraction has 7285 states and 19400 transitions. [2021-07-13 19:14:41,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 7285 states and 19400 transitions. [2021-07-13 19:14:41,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:41,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:41,225 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:41,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-13 19:14:41,426 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:41,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1830939413, now seen corresponding path program 138 times [2021-07-13 19:14:41,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:41,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070961548] [2021-07-13 19:14:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:41,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:41,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070961548] [2021-07-13 19:14:41,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070961548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:41,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273525162] [2021-07-13 19:14:41,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:41,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:14:41,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:41,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:41,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273525162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:41,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:41,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-13 19:14:41,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315667697] [2021-07-13 19:14:41,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:41,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:41,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:41,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:41,588 INFO L87 Difference]: Start difference. First operand 7285 states and 19400 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:41,968 INFO L93 Difference]: Finished difference Result 7653 states and 20013 transitions. [2021-07-13 19:14:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:41,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:41,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:41,979 INFO L225 Difference]: With dead ends: 7653 [2021-07-13 19:14:41,979 INFO L226 Difference]: Without dead ends: 7538 [2021-07-13 19:14:41,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-07-13 19:14:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 7173. [2021-07-13 19:14:42,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 2.668293363078639) internal successors, (19137), 7172 states have internal predecessors, (19137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 19137 transitions. [2021-07-13 19:14:42,073 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 19137 transitions. Word has length 47 [2021-07-13 19:14:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:42,074 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 19137 transitions. [2021-07-13 19:14:42,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 19137 transitions. [2021-07-13 19:14:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:42,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:42,079 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:42,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-13 19:14:42,279 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:42,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1217403233, now seen corresponding path program 139 times [2021-07-13 19:14:42,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:42,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420046431] [2021-07-13 19:14:42,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:42,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420046431] [2021-07-13 19:14:42,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420046431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:42,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106006450] [2021-07-13 19:14:42,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:42,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:42,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:14:42,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106006450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:42,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:42,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-13 19:14:42,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49032640] [2021-07-13 19:14:42,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:42,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:42,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:42,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:42,438 INFO L87 Difference]: Start difference. First operand 7173 states and 19137 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:42,720 INFO L93 Difference]: Finished difference Result 7696 states and 20154 transitions. [2021-07-13 19:14:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:42,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:42,729 INFO L225 Difference]: With dead ends: 7696 [2021-07-13 19:14:42,729 INFO L226 Difference]: Without dead ends: 7684 [2021-07-13 19:14:42,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:42,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7684 states. [2021-07-13 19:14:42,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7684 to 7175. [2021-07-13 19:14:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7175 states, 7174 states have (on average 2.6681070532478395) internal successors, (19141), 7174 states have internal predecessors, (19141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 19141 transitions. [2021-07-13 19:14:42,818 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 19141 transitions. Word has length 47 [2021-07-13 19:14:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:42,819 INFO L482 AbstractCegarLoop]: Abstraction has 7175 states and 19141 transitions. [2021-07-13 19:14:42,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 19141 transitions. [2021-07-13 19:14:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:42,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:42,824 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:43,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:43,025 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:43,025 INFO L82 PathProgramCache]: Analyzing trace with hash -430954270, now seen corresponding path program 140 times [2021-07-13 19:14:43,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:43,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616744259] [2021-07-13 19:14:43,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:43,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:43,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616744259] [2021-07-13 19:14:43,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616744259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:43,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111728676] [2021-07-13 19:14:43,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:43,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:43,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:43,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:43,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111728676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:43,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:43,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:14:43,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235991843] [2021-07-13 19:14:43,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:14:43,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:43,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:14:43,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:14:43,169 INFO L87 Difference]: Start difference. First operand 7175 states and 19141 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:43,280 INFO L93 Difference]: Finished difference Result 8501 states and 21546 transitions. [2021-07-13 19:14:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:14:43,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:43,292 INFO L225 Difference]: With dead ends: 8501 [2021-07-13 19:14:43,292 INFO L226 Difference]: Without dead ends: 8495 [2021-07-13 19:14:43,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:43,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8495 states. [2021-07-13 19:14:43,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8495 to 7174. [2021-07-13 19:14:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7174 states, 7173 states have (on average 2.6675031367628605) internal successors, (19134), 7173 states have internal predecessors, (19134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7174 states to 7174 states and 19134 transitions. [2021-07-13 19:14:43,398 INFO L78 Accepts]: Start accepts. Automaton has 7174 states and 19134 transitions. Word has length 47 [2021-07-13 19:14:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:43,398 INFO L482 AbstractCegarLoop]: Abstraction has 7174 states and 19134 transitions. [2021-07-13 19:14:43,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 7174 states and 19134 transitions. [2021-07-13 19:14:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:43,403 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:43,403 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:43,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:43,604 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:43,604 INFO L82 PathProgramCache]: Analyzing trace with hash -935646729, now seen corresponding path program 141 times [2021-07-13 19:14:43,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:43,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13948955] [2021-07-13 19:14:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:43,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:43,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13948955] [2021-07-13 19:14:43,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13948955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:43,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620328175] [2021-07-13 19:14:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:43,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:14:43,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:43,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:43,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620328175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:43,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:43,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:14:43,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970710673] [2021-07-13 19:14:43,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:43,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:43,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:43,760 INFO L87 Difference]: Start difference. First operand 7174 states and 19134 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:44,223 INFO L93 Difference]: Finished difference Result 8738 states and 22335 transitions. [2021-07-13 19:14:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:14:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:44,236 INFO L225 Difference]: With dead ends: 8738 [2021-07-13 19:14:44,237 INFO L226 Difference]: Without dead ends: 8684 [2021-07-13 19:14:44,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:14:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-07-13 19:14:44,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 7281. [2021-07-13 19:14:44,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 2.6664835164835163) internal successors, (19412), 7280 states have internal predecessors, (19412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19412 transitions. [2021-07-13 19:14:44,357 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19412 transitions. Word has length 47 [2021-07-13 19:14:44,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:44,357 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19412 transitions. [2021-07-13 19:14:44,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,357 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19412 transitions. [2021-07-13 19:14:44,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:44,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:44,362 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:44,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:44,563 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash 596912380, now seen corresponding path program 142 times [2021-07-13 19:14:44,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:44,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428470897] [2021-07-13 19:14:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:44,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:44,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428470897] [2021-07-13 19:14:44,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428470897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:44,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411368416] [2021-07-13 19:14:44,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:44,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:44,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:44,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:44,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:44,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411368416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:44,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:44,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:14:44,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211642787] [2021-07-13 19:14:44,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:44,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:44,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:44,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:44,724 INFO L87 Difference]: Start difference. First operand 7281 states and 19412 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:44,880 INFO L93 Difference]: Finished difference Result 8660 states and 21915 transitions. [2021-07-13 19:14:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:14:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:44,896 INFO L225 Difference]: With dead ends: 8660 [2021-07-13 19:14:44,896 INFO L226 Difference]: Without dead ends: 8642 [2021-07-13 19:14:44,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8642 states. [2021-07-13 19:14:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8642 to 7281. [2021-07-13 19:14:45,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 2.665521978021978) internal successors, (19405), 7280 states have internal predecessors, (19405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:45,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19405 transitions. [2021-07-13 19:14:45,036 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19405 transitions. Word has length 47 [2021-07-13 19:14:45,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:45,036 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19405 transitions. [2021-07-13 19:14:45,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19405 transitions. [2021-07-13 19:14:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:45,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:45,042 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:45,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:45,242 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:45,243 INFO L82 PathProgramCache]: Analyzing trace with hash -780810195, now seen corresponding path program 143 times [2021-07-13 19:14:45,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:45,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093537253] [2021-07-13 19:14:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:45,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:45,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093537253] [2021-07-13 19:14:45,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093537253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:45,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505645059] [2021-07-13 19:14:45,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:45,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:14:45,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:45,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:45,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:45,440 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:45,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505645059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:45,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:45,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:14:45,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271062919] [2021-07-13 19:14:45,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:14:45,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:45,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:14:45,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:45,441 INFO L87 Difference]: Start difference. First operand 7281 states and 19405 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:46,171 INFO L93 Difference]: Finished difference Result 11178 states and 27510 transitions. [2021-07-13 19:14:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:14:46,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:46,187 INFO L225 Difference]: With dead ends: 11178 [2021-07-13 19:14:46,187 INFO L226 Difference]: Without dead ends: 11010 [2021-07-13 19:14:46,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:14:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2021-07-13 19:14:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 7582. [2021-07-13 19:14:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.6559820604141935) internal successors, (20135), 7581 states have internal predecessors, (20135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20135 transitions. [2021-07-13 19:14:46,323 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20135 transitions. Word has length 47 [2021-07-13 19:14:46,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:46,323 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20135 transitions. [2021-07-13 19:14:46,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20135 transitions. [2021-07-13 19:14:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:46,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:46,329 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:46,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-07-13 19:14:46,529 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:46,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:46,530 INFO L82 PathProgramCache]: Analyzing trace with hash -394207518, now seen corresponding path program 144 times [2021-07-13 19:14:46,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:46,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984983395] [2021-07-13 19:14:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:46,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:46,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984983395] [2021-07-13 19:14:46,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984983395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:46,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024079682] [2021-07-13 19:14:46,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:46,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:14:46,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:46,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:46,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:46,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024079682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:46,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:46,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:14:46,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968294634] [2021-07-13 19:14:46,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:14:46,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:46,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:14:46,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:14:46,688 INFO L87 Difference]: Start difference. First operand 7582 states and 20135 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:46,850 INFO L93 Difference]: Finished difference Result 9069 states and 22840 transitions. [2021-07-13 19:14:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:46,864 INFO L225 Difference]: With dead ends: 9069 [2021-07-13 19:14:46,864 INFO L226 Difference]: Without dead ends: 9042 [2021-07-13 19:14:46,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-07-13 19:14:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 7582. [2021-07-13 19:14:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.6555863342566943) internal successors, (20132), 7581 states have internal predecessors, (20132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20132 transitions. [2021-07-13 19:14:46,986 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20132 transitions. Word has length 47 [2021-07-13 19:14:46,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:46,986 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20132 transitions. [2021-07-13 19:14:46,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20132 transitions. [2021-07-13 19:14:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:46,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:46,991 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:47,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-07-13 19:14:47,192 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:47,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:47,192 INFO L82 PathProgramCache]: Analyzing trace with hash -840501705, now seen corresponding path program 145 times [2021-07-13 19:14:47,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:47,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582656865] [2021-07-13 19:14:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:47,282 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:47,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:47,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582656865] [2021-07-13 19:14:47,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582656865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:47,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751348472] [2021-07-13 19:14:47,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:47,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-13 19:14:47,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:47,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:14:47,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:14:47,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:14:47,418 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:14:47,418 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:14:47,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:14:47,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:14:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:47,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751348472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:47,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:47,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:14:47,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226991360] [2021-07-13 19:14:47,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:14:47,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:47,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:14:47,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:47,425 INFO L87 Difference]: Start difference. First operand 7582 states and 20132 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:48,670 INFO L93 Difference]: Finished difference Result 16993 states and 39932 transitions. [2021-07-13 19:14:48,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 19:14:48,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:48,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:48,695 INFO L225 Difference]: With dead ends: 16993 [2021-07-13 19:14:48,695 INFO L226 Difference]: Without dead ends: 16471 [2021-07-13 19:14:48,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 789.3ms TimeCoverageRelationStatistics Valid=645, Invalid=5517, Unknown=0, NotChecked=0, Total=6162 [2021-07-13 19:14:48,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16471 states. [2021-07-13 19:14:48,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16471 to 8142. [2021-07-13 19:14:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8142 states, 8141 states have (on average 2.6381279941039186) internal successors, (21477), 8141 states have internal predecessors, (21477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21477 transitions. [2021-07-13 19:14:48,862 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21477 transitions. Word has length 47 [2021-07-13 19:14:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:48,862 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21477 transitions. [2021-07-13 19:14:48,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21477 transitions. [2021-07-13 19:14:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:48,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:48,868 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:49,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-07-13 19:14:49,068 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1053071164, now seen corresponding path program 146 times [2021-07-13 19:14:49,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:49,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885627087] [2021-07-13 19:14:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:49,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:49,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885627087] [2021-07-13 19:14:49,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885627087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:49,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749247021] [2021-07-13 19:14:49,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:49,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:49,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:49,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:49,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:49,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749247021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:49,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:49,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:14:49,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006147228] [2021-07-13 19:14:49,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:49,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:49,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:49,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:49,242 INFO L87 Difference]: Start difference. First operand 8142 states and 21477 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:49,428 INFO L93 Difference]: Finished difference Result 9828 states and 24560 transitions. [2021-07-13 19:14:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:49,444 INFO L225 Difference]: With dead ends: 9828 [2021-07-13 19:14:49,444 INFO L226 Difference]: Without dead ends: 9792 [2021-07-13 19:14:49,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2021-07-13 19:14:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8142. [2021-07-13 19:14:49,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8142 states, 8141 states have (on average 2.637759489006265) internal successors, (21474), 8141 states have internal predecessors, (21474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21474 transitions. [2021-07-13 19:14:49,585 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21474 transitions. Word has length 47 [2021-07-13 19:14:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:49,585 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21474 transitions. [2021-07-13 19:14:49,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21474 transitions. [2021-07-13 19:14:49,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:49,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:49,592 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:49,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-07-13 19:14:49,797 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash -993815571, now seen corresponding path program 147 times [2021-07-13 19:14:49,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:49,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752067772] [2021-07-13 19:14:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:49,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:49,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752067772] [2021-07-13 19:14:49,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752067772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:49,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666049817] [2021-07-13 19:14:49,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:49,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:14:49,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:49,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:49,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:49,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666049817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:49,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:49,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:14:49,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626931110] [2021-07-13 19:14:49,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:49,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:49,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:49,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:49,976 INFO L87 Difference]: Start difference. First operand 8142 states and 21474 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:51,979 INFO L93 Difference]: Finished difference Result 19383 states and 45637 transitions. [2021-07-13 19:14:51,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-07-13 19:14:51,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:51,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:52,009 INFO L225 Difference]: With dead ends: 19383 [2021-07-13 19:14:52,010 INFO L226 Difference]: Without dead ends: 18765 [2021-07-13 19:14:52,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6450 ImplicationChecksByTransitivity, 1466.6ms TimeCoverageRelationStatistics Valid=1455, Invalid=14547, Unknown=0, NotChecked=0, Total=16002 [2021-07-13 19:14:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18765 states. [2021-07-13 19:14:52,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18765 to 8971. [2021-07-13 19:14:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8971 states, 8970 states have (on average 2.618283166109253) internal successors, (23486), 8970 states have internal predecessors, (23486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23486 transitions. [2021-07-13 19:14:52,210 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23486 transitions. Word has length 47 [2021-07-13 19:14:52,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:52,210 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23486 transitions. [2021-07-13 19:14:52,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,210 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23486 transitions. [2021-07-13 19:14:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:52,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:52,217 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:52,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-07-13 19:14:52,417 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:52,418 INFO L82 PathProgramCache]: Analyzing trace with hash -244397918, now seen corresponding path program 148 times [2021-07-13 19:14:52,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:52,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950043330] [2021-07-13 19:14:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:52,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:52,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950043330] [2021-07-13 19:14:52,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950043330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:52,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138543376] [2021-07-13 19:14:52,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:52,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:52,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:52,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138543376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:52,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:52,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:14:52,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204605291] [2021-07-13 19:14:52,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:52,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:52,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:52,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:52,604 INFO L87 Difference]: Start difference. First operand 8971 states and 23486 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:52,842 INFO L93 Difference]: Finished difference Result 11009 states and 27233 transitions. [2021-07-13 19:14:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:52,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:52,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:52,858 INFO L225 Difference]: With dead ends: 11009 [2021-07-13 19:14:52,859 INFO L226 Difference]: Without dead ends: 10964 [2021-07-13 19:14:52,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:52,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2021-07-13 19:14:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 8971. [2021-07-13 19:14:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8971 states, 8970 states have (on average 2.617948717948718) internal successors, (23483), 8970 states have internal predecessors, (23483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23483 transitions. [2021-07-13 19:14:53,009 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23483 transitions. Word has length 47 [2021-07-13 19:14:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:53,009 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23483 transitions. [2021-07-13 19:14:53,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23483 transitions. [2021-07-13 19:14:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:53,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:53,015 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:53,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-07-13 19:14:53,216 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:53,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:53,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1478005367, now seen corresponding path program 149 times [2021-07-13 19:14:53,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:53,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935837817] [2021-07-13 19:14:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:53,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:53,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935837817] [2021-07-13 19:14:53,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935837817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:53,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431066481] [2021-07-13 19:14:53,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:53,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:14:53,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:53,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:53,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431066481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:53,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:53,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:14:53,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850961331] [2021-07-13 19:14:53,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:53,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:53,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:53,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:53,529 INFO L87 Difference]: Start difference. First operand 8971 states and 23483 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:54,076 INFO L93 Difference]: Finished difference Result 11682 states and 28568 transitions. [2021-07-13 19:14:54,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:14:54,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:54,092 INFO L225 Difference]: With dead ends: 11682 [2021-07-13 19:14:54,092 INFO L226 Difference]: Without dead ends: 10842 [2021-07-13 19:14:54,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:14:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10842 states. [2021-07-13 19:14:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 6870. [2021-07-13 19:14:54,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6870 states, 6869 states have (on average 2.6869995632552044) internal successors, (18457), 6869 states have internal predecessors, (18457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 18457 transitions. [2021-07-13 19:14:54,200 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 18457 transitions. Word has length 47 [2021-07-13 19:14:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:54,200 INFO L482 AbstractCegarLoop]: Abstraction has 6870 states and 18457 transitions. [2021-07-13 19:14:54,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 18457 transitions. [2021-07-13 19:14:54,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:54,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:54,205 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:54,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:54,405 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:54,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1239943850, now seen corresponding path program 71 times [2021-07-13 19:14:54,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:54,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672256770] [2021-07-13 19:14:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:54,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:54,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672256770] [2021-07-13 19:14:54,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672256770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:54,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403893311] [2021-07-13 19:14:54,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:54,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:14:54,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:54,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403893311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:54,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:54,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2021-07-13 19:14:54,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059580671] [2021-07-13 19:14:54,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:14:54,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:54,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:14:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:54,582 INFO L87 Difference]: Start difference. First operand 6870 states and 18457 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:54,860 INFO L93 Difference]: Finished difference Result 8334 states and 21563 transitions. [2021-07-13 19:14:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:14:54,860 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:54,873 INFO L225 Difference]: With dead ends: 8334 [2021-07-13 19:14:54,873 INFO L226 Difference]: Without dead ends: 8318 [2021-07-13 19:14:54,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2021-07-13 19:14:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 7293. [2021-07-13 19:14:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7293 states, 7292 states have (on average 2.686368623148656) internal successors, (19589), 7292 states have internal predecessors, (19589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7293 states to 7293 states and 19589 transitions. [2021-07-13 19:14:54,986 INFO L78 Accepts]: Start accepts. Automaton has 7293 states and 19589 transitions. Word has length 47 [2021-07-13 19:14:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:54,986 INFO L482 AbstractCegarLoop]: Abstraction has 7293 states and 19589 transitions. [2021-07-13 19:14:54,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 7293 states and 19589 transitions. [2021-07-13 19:14:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:54,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:54,991 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:55,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-07-13 19:14:55,192 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:55,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:55,192 INFO L82 PathProgramCache]: Analyzing trace with hash 618063440, now seen corresponding path program 72 times [2021-07-13 19:14:55,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:55,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052157905] [2021-07-13 19:14:55,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:55,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052157905] [2021-07-13 19:14:55,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052157905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:55,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392543905] [2021-07-13 19:14:55,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:55,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:14:55,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:55,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:55,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392543905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:55,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:55,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-13 19:14:55,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615913004] [2021-07-13 19:14:55,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:14:55,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:55,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:14:55,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:14:55,349 INFO L87 Difference]: Start difference. First operand 7293 states and 19589 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:55,565 INFO L93 Difference]: Finished difference Result 8900 states and 22808 transitions. [2021-07-13 19:14:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:14:55,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:55,580 INFO L225 Difference]: With dead ends: 8900 [2021-07-13 19:14:55,580 INFO L226 Difference]: Without dead ends: 8900 [2021-07-13 19:14:55,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:14:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-07-13 19:14:55,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 7296. [2021-07-13 19:14:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7296 states, 7295 states have (on average 2.6864976010966415) internal successors, (19598), 7295 states have internal predecessors, (19598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:55,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 19598 transitions. [2021-07-13 19:14:55,704 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 19598 transitions. Word has length 47 [2021-07-13 19:14:55,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:55,704 INFO L482 AbstractCegarLoop]: Abstraction has 7296 states and 19598 transitions. [2021-07-13 19:14:55,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 19598 transitions. [2021-07-13 19:14:55,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:55,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:55,709 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:55,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:55,910 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:55,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:55,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1019509016, now seen corresponding path program 73 times [2021-07-13 19:14:55,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:55,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850287118] [2021-07-13 19:14:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:55,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:55,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850287118] [2021-07-13 19:14:55,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850287118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:55,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767851405] [2021-07-13 19:14:55,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:55,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:14:55,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:56,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767851405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:56,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:56,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-07-13 19:14:56,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440434048] [2021-07-13 19:14:56,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:56,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:56,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:56,083 INFO L87 Difference]: Start difference. First operand 7296 states and 19598 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:56,440 INFO L93 Difference]: Finished difference Result 8356 states and 21589 transitions. [2021-07-13 19:14:56,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:14:56,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:56,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:56,453 INFO L225 Difference]: With dead ends: 8356 [2021-07-13 19:14:56,453 INFO L226 Difference]: Without dead ends: 8356 [2021-07-13 19:14:56,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:14:56,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-07-13 19:14:56,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 7143. [2021-07-13 19:14:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 7142 states have (on average 2.690422850742089) internal successors, (19215), 7142 states have internal predecessors, (19215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 19215 transitions. [2021-07-13 19:14:56,578 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 19215 transitions. Word has length 47 [2021-07-13 19:14:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:56,578 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 19215 transitions. [2021-07-13 19:14:56,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 19215 transitions. [2021-07-13 19:14:56,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-13 19:14:56,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:56,583 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:56,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:56,784 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:56,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:56,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1559844220, now seen corresponding path program 150 times [2021-07-13 19:14:56,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:56,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660753358] [2021-07-13 19:14:56,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:56,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:56,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660753358] [2021-07-13 19:14:56,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660753358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:56,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837684455] [2021-07-13 19:14:56,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:56,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:14:56,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:56,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:56,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:56,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837684455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:56,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:56,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:14:56,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377603584] [2021-07-13 19:14:56,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:56,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:56,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:56,973 INFO L87 Difference]: Start difference. First operand 7143 states and 19215 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:57,183 INFO L93 Difference]: Finished difference Result 8410 states and 21506 transitions. [2021-07-13 19:14:57,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-13 19:14:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:57,195 INFO L225 Difference]: With dead ends: 8410 [2021-07-13 19:14:57,195 INFO L226 Difference]: Without dead ends: 8354 [2021-07-13 19:14:57,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8354 states. [2021-07-13 19:14:57,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8354 to 7152. [2021-07-13 19:14:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7152 states, 7151 states have (on average 2.6889945462173124) internal successors, (19229), 7151 states have internal predecessors, (19229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 19229 transitions. [2021-07-13 19:14:57,303 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 19229 transitions. Word has length 47 [2021-07-13 19:14:57,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:57,303 INFO L482 AbstractCegarLoop]: Abstraction has 7152 states and 19229 transitions. [2021-07-13 19:14:57,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 19229 transitions. [2021-07-13 19:14:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 19:14:57,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:57,309 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:57,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:57,510 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:57,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:57,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2086787547, now seen corresponding path program 151 times [2021-07-13 19:14:57,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:57,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253550526] [2021-07-13 19:14:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:14:57,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253550526] [2021-07-13 19:14:57,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253550526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907481877] [2021-07-13 19:14:57,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:57,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:14:57,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 51 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:57,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907481877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:57,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:57,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 22 [2021-07-13 19:14:57,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519764039] [2021-07-13 19:14:57,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:14:57,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:57,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:14:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:14:57,841 INFO L87 Difference]: Start difference. First operand 7152 states and 19229 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:59,031 INFO L93 Difference]: Finished difference Result 9713 states and 24252 transitions. [2021-07-13 19:14:59,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-13 19:14:59,032 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 19:14:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:59,047 INFO L225 Difference]: With dead ends: 9713 [2021-07-13 19:14:59,047 INFO L226 Difference]: Without dead ends: 9671 [2021-07-13 19:14:59,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 641.9ms TimeCoverageRelationStatistics Valid=620, Invalid=2460, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:14:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-07-13 19:14:59,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 7802. [2021-07-13 19:14:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7802 states, 7801 states have (on average 2.6345340340981926) internal successors, (20552), 7801 states have internal predecessors, (20552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7802 states to 7802 states and 20552 transitions. [2021-07-13 19:14:59,213 INFO L78 Accepts]: Start accepts. Automaton has 7802 states and 20552 transitions. Word has length 50 [2021-07-13 19:14:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:59,213 INFO L482 AbstractCegarLoop]: Abstraction has 7802 states and 20552 transitions. [2021-07-13 19:14:59,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,213 INFO L276 IsEmpty]: Start isEmpty. Operand 7802 states and 20552 transitions. [2021-07-13 19:14:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 19:14:59,219 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:59,220 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:59,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:59,420 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:59,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1860539001, now seen corresponding path program 152 times [2021-07-13 19:14:59,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:59,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375388763] [2021-07-13 19:14:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:14:59,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:59,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375388763] [2021-07-13 19:14:59,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375388763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:59,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311855560] [2021-07-13 19:14:59,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:59,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:59,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:59,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:14:59,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311855560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:59,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:59,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:14:59,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807060204] [2021-07-13 19:14:59,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:14:59,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:59,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:14:59,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:59,600 INFO L87 Difference]: Start difference. First operand 7802 states and 20552 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:59,858 INFO L93 Difference]: Finished difference Result 8830 states and 22462 transitions. [2021-07-13 19:14:59,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:14:59,859 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 19:14:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:59,872 INFO L225 Difference]: With dead ends: 8830 [2021-07-13 19:14:59,873 INFO L226 Difference]: Without dead ends: 8773 [2021-07-13 19:14:59,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:14:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8773 states. [2021-07-13 19:14:59,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8773 to 7820. [2021-07-13 19:14:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7820 states, 7819 states have (on average 2.632945389435989) internal successors, (20587), 7819 states have internal predecessors, (20587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7820 states to 7820 states and 20587 transitions. [2021-07-13 19:14:59,988 INFO L78 Accepts]: Start accepts. Automaton has 7820 states and 20587 transitions. Word has length 50 [2021-07-13 19:14:59,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:59,988 INFO L482 AbstractCegarLoop]: Abstraction has 7820 states and 20587 transitions. [2021-07-13 19:14:59,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:59,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7820 states and 20587 transitions. [2021-07-13 19:14:59,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 19:14:59,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:59,993 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:00,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:00,194 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:00,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1761499875, now seen corresponding path program 153 times [2021-07-13 19:15:00,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:00,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955427772] [2021-07-13 19:15:00,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:15:00,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955427772] [2021-07-13 19:15:00,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955427772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430448971] [2021-07-13 19:15:00,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:00,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:15:00,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:00,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:00,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:00,333 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:15:00,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430448971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:00,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:00,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:15:00,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630491705] [2021-07-13 19:15:00,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:15:00,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:00,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:15:00,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:00,334 INFO L87 Difference]: Start difference. First operand 7820 states and 20587 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:00,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:00,575 INFO L93 Difference]: Finished difference Result 8754 states and 22356 transitions. [2021-07-13 19:15:00,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:00,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 19:15:00,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:00,588 INFO L225 Difference]: With dead ends: 8754 [2021-07-13 19:15:00,588 INFO L226 Difference]: Without dead ends: 8694 [2021-07-13 19:15:00,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8694 states. [2021-07-13 19:15:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8694 to 7865. [2021-07-13 19:15:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 2.6280518819938963) internal successors, (20667), 7864 states have internal predecessors, (20667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 20667 transitions. [2021-07-13 19:15:00,701 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 20667 transitions. Word has length 50 [2021-07-13 19:15:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:00,701 INFO L482 AbstractCegarLoop]: Abstraction has 7865 states and 20667 transitions. [2021-07-13 19:15:00,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:00,701 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 20667 transitions. [2021-07-13 19:15:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 19:15:00,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:00,707 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:00,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:00,908 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:00,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:00,908 INFO L82 PathProgramCache]: Analyzing trace with hash -836689913, now seen corresponding path program 154 times [2021-07-13 19:15:00,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:00,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032670715] [2021-07-13 19:15:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:15:00,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:00,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032670715] [2021-07-13 19:15:00,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032670715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:00,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828728954] [2021-07-13 19:15:00,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:00,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:00,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:00,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:00,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:15:01,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828728954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:01,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:01,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:15:01,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978360204] [2021-07-13 19:15:01,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:15:01,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:01,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:15:01,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:01,047 INFO L87 Difference]: Start difference. First operand 7865 states and 20667 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:01,302 INFO L93 Difference]: Finished difference Result 8782 states and 22434 transitions. [2021-07-13 19:15:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 19:15:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:01,315 INFO L225 Difference]: With dead ends: 8782 [2021-07-13 19:15:01,315 INFO L226 Difference]: Without dead ends: 8744 [2021-07-13 19:15:01,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2021-07-13 19:15:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7937. [2021-07-13 19:15:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7937 states, 7936 states have (on average 2.62109375) internal successors, (20801), 7936 states have internal predecessors, (20801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7937 states to 7937 states and 20801 transitions. [2021-07-13 19:15:01,428 INFO L78 Accepts]: Start accepts. Automaton has 7937 states and 20801 transitions. Word has length 50 [2021-07-13 19:15:01,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:01,428 INFO L482 AbstractCegarLoop]: Abstraction has 7937 states and 20801 transitions. [2021-07-13 19:15:01,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:01,428 INFO L276 IsEmpty]: Start isEmpty. Operand 7937 states and 20801 transitions. [2021-07-13 19:15:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 19:15:01,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:01,435 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:01,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-07-13 19:15:01,636 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash 391944291, now seen corresponding path program 155 times [2021-07-13 19:15:01,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:01,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828335097] [2021-07-13 19:15:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:15:01,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:01,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828335097] [2021-07-13 19:15:01,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828335097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:01,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335306196] [2021-07-13 19:15:01,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:01,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:15:01,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:01,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:01,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:15:01,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335306196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:01,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:01,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:15:01,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540007105] [2021-07-13 19:15:01,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:15:01,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:01,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:15:01,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:01,792 INFO L87 Difference]: Start difference. First operand 7937 states and 20801 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:02,132 INFO L93 Difference]: Finished difference Result 8848 states and 22578 transitions. [2021-07-13 19:15:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:02,132 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 19:15:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:02,144 INFO L225 Difference]: With dead ends: 8848 [2021-07-13 19:15:02,144 INFO L226 Difference]: Without dead ends: 8814 [2021-07-13 19:15:02,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8814 states. [2021-07-13 19:15:02,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8814 to 8036. [2021-07-13 19:15:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8036 states, 8035 states have (on average 2.612196639701307) internal successors, (20989), 8035 states have internal predecessors, (20989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8036 states to 8036 states and 20989 transitions. [2021-07-13 19:15:02,266 INFO L78 Accepts]: Start accepts. Automaton has 8036 states and 20989 transitions. Word has length 50 [2021-07-13 19:15:02,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:02,267 INFO L482 AbstractCegarLoop]: Abstraction has 8036 states and 20989 transitions. [2021-07-13 19:15:02,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 8036 states and 20989 transitions. [2021-07-13 19:15:02,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 19:15:02,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:02,274 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:02,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:02,475 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:02,475 INFO L82 PathProgramCache]: Analyzing trace with hash 922219143, now seen corresponding path program 156 times [2021-07-13 19:15:02,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:02,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57066711] [2021-07-13 19:15:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:15:02,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:02,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57066711] [2021-07-13 19:15:02,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57066711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:02,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819448111] [2021-07-13 19:15:02,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:02,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 19:15:02,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:02,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:15:02,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819448111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:02,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:02,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:15:02,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342074829] [2021-07-13 19:15:02,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:15:02,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:02,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:15:02,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:02,623 INFO L87 Difference]: Start difference. First operand 8036 states and 20989 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:02,876 INFO L93 Difference]: Finished difference Result 9347 states and 23857 transitions. [2021-07-13 19:15:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 19:15:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:02,890 INFO L225 Difference]: With dead ends: 9347 [2021-07-13 19:15:02,891 INFO L226 Difference]: Without dead ends: 9311 [2021-07-13 19:15:02,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2021-07-13 19:15:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8477. [2021-07-13 19:15:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8477 states, 8476 states have (on average 2.612907031618688) internal successors, (22147), 8476 states have internal predecessors, (22147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8477 states to 8477 states and 22147 transitions. [2021-07-13 19:15:03,013 INFO L78 Accepts]: Start accepts. Automaton has 8477 states and 22147 transitions. Word has length 50 [2021-07-13 19:15:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:03,013 INFO L482 AbstractCegarLoop]: Abstraction has 8477 states and 22147 transitions. [2021-07-13 19:15:03,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 8477 states and 22147 transitions. [2021-07-13 19:15:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-13 19:15:03,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:03,020 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:03,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-07-13 19:15:03,220 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1450620387, now seen corresponding path program 157 times [2021-07-13 19:15:03,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:03,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962799047] [2021-07-13 19:15:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:03,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:03,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962799047] [2021-07-13 19:15:03,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962799047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:03,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154051808] [2021-07-13 19:15:03,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:03,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:03,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:03,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154051808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:03,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:03,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-13 19:15:03,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672460827] [2021-07-13 19:15:03,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:15:03,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:03,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:15:03,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:03,369 INFO L87 Difference]: Start difference. First operand 8477 states and 22147 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:03,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:03,617 INFO L93 Difference]: Finished difference Result 9828 states and 25051 transitions. [2021-07-13 19:15:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:03,617 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-13 19:15:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:03,631 INFO L225 Difference]: With dead ends: 9828 [2021-07-13 19:15:03,631 INFO L226 Difference]: Without dead ends: 9803 [2021-07-13 19:15:03,632 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-07-13 19:15:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 8967. [2021-07-13 19:15:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8967 states, 8966 states have (on average 2.605955833147446) internal successors, (23365), 8966 states have internal predecessors, (23365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8967 states to 8967 states and 23365 transitions. [2021-07-13 19:15:03,765 INFO L78 Accepts]: Start accepts. Automaton has 8967 states and 23365 transitions. Word has length 50 [2021-07-13 19:15:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:03,765 INFO L482 AbstractCegarLoop]: Abstraction has 8967 states and 23365 transitions. [2021-07-13 19:15:03,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 8967 states and 23365 transitions. [2021-07-13 19:15:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:03,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:03,775 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:03,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-13 19:15:03,976 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1040519320, now seen corresponding path program 74 times [2021-07-13 19:15:03,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:03,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586295810] [2021-07-13 19:15:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:04,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:04,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586295810] [2021-07-13 19:15:04,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586295810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:04,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939337009] [2021-07-13 19:15:04,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:04,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:04,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:04,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:15:04,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:04,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:15:04,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:15:04,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:15:04,970 INFO L628 ElimStorePlain]: treesize reduction 19, result has 5.0 percent of original size [2021-07-13 19:15:04,970 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:15:04,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:15:04,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:1 [2021-07-13 19:15:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:04,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939337009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:04,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:04,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-07-13 19:15:04,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944829950] [2021-07-13 19:15:04,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 19:15:04,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:04,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 19:15:04,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:15:04,977 INFO L87 Difference]: Start difference. First operand 8967 states and 23365 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:16,772 INFO L93 Difference]: Finished difference Result 20584 states and 47715 transitions. [2021-07-13 19:15:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-07-13 19:15:16,773 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:16,805 INFO L225 Difference]: With dead ends: 20584 [2021-07-13 19:15:16,805 INFO L226 Difference]: Without dead ends: 19760 [2021-07-13 19:15:16,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 10110.2ms TimeCoverageRelationStatistics Valid=7737, Invalid=56525, Unknown=0, NotChecked=0, Total=64262 [2021-07-13 19:15:16,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19760 states. [2021-07-13 19:15:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19760 to 9874. [2021-07-13 19:15:17,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9874 states, 9873 states have (on average 2.635976906715284) internal successors, (26025), 9873 states have internal predecessors, (26025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:17,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 26025 transitions. [2021-07-13 19:15:17,060 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 26025 transitions. Word has length 53 [2021-07-13 19:15:17,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:17,060 INFO L482 AbstractCegarLoop]: Abstraction has 9874 states and 26025 transitions. [2021-07-13 19:15:17,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 26025 transitions. [2021-07-13 19:15:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:17,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:17,070 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:17,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:17,271 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:17,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:17,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1328551784, now seen corresponding path program 158 times [2021-07-13 19:15:17,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:17,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003372723] [2021-07-13 19:15:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:17,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:17,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003372723] [2021-07-13 19:15:17,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003372723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:17,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339724594] [2021-07-13 19:15:17,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:17,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:17,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:17,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:17,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:17,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339724594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:17,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:17,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-13 19:15:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237481833] [2021-07-13 19:15:17,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:15:17,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:17,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:15:17,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:15:17,695 INFO L87 Difference]: Start difference. First operand 9874 states and 26025 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:18,660 INFO L93 Difference]: Finished difference Result 10122 states and 26411 transitions. [2021-07-13 19:15:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:18,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:18,676 INFO L225 Difference]: With dead ends: 10122 [2021-07-13 19:15:18,676 INFO L226 Difference]: Without dead ends: 10030 [2021-07-13 19:15:18,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:15:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-07-13 19:15:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 9858. [2021-07-13 19:15:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9858 states, 9857 states have (on average 2.632038145480369) internal successors, (25944), 9857 states have internal predecessors, (25944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:18,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 25944 transitions. [2021-07-13 19:15:18,825 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 25944 transitions. Word has length 53 [2021-07-13 19:15:18,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:18,825 INFO L482 AbstractCegarLoop]: Abstraction has 9858 states and 25944 transitions. [2021-07-13 19:15:18,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:18,825 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 25944 transitions. [2021-07-13 19:15:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:18,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:18,835 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:19,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-13 19:15:19,035 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:19,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:19,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1609870245, now seen corresponding path program 75 times [2021-07-13 19:15:19,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:19,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188828740] [2021-07-13 19:15:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 79 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:19,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188828740] [2021-07-13 19:15:19,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188828740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000676791] [2021-07-13 19:15:19,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:19,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:15:19,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:19,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:19,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000676791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:19,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:19,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:15:19,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63598420] [2021-07-13 19:15:19,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:15:19,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:15:19,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:19,223 INFO L87 Difference]: Start difference. First operand 9858 states and 25944 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:19,420 INFO L93 Difference]: Finished difference Result 13958 states and 35088 transitions. [2021-07-13 19:15:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:19,444 INFO L225 Difference]: With dead ends: 13958 [2021-07-13 19:15:19,444 INFO L226 Difference]: Without dead ends: 13958 [2021-07-13 19:15:19,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13958 states. [2021-07-13 19:15:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13958 to 10572. [2021-07-13 19:15:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10572 states, 10571 states have (on average 2.6615268186548104) internal successors, (28135), 10571 states have internal predecessors, (28135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10572 states to 10572 states and 28135 transitions. [2021-07-13 19:15:19,678 INFO L78 Accepts]: Start accepts. Automaton has 10572 states and 28135 transitions. Word has length 53 [2021-07-13 19:15:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:19,678 INFO L482 AbstractCegarLoop]: Abstraction has 10572 states and 28135 transitions. [2021-07-13 19:15:19,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 10572 states and 28135 transitions. [2021-07-13 19:15:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:19,687 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:19,687 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:19,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-07-13 19:15:19,888 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2143735621, now seen corresponding path program 159 times [2021-07-13 19:15:19,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:19,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322024045] [2021-07-13 19:15:19,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:19,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:19,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322024045] [2021-07-13 19:15:19,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322024045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:19,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141649707] [2021-07-13 19:15:19,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:19,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:15:19,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:19,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:20,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141649707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:20,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:20,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:15:20,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307944417] [2021-07-13 19:15:20,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:20,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:20,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:20,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:20,059 INFO L87 Difference]: Start difference. First operand 10572 states and 28135 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:20,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:20,211 INFO L93 Difference]: Finished difference Result 11271 states and 29322 transitions. [2021-07-13 19:15:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:20,211 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:20,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:20,230 INFO L225 Difference]: With dead ends: 11271 [2021-07-13 19:15:20,230 INFO L226 Difference]: Without dead ends: 11265 [2021-07-13 19:15:20,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-07-13 19:15:20,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10496. [2021-07-13 19:15:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10496 states, 10495 states have (on average 2.6580276322058123) internal successors, (27896), 10495 states have internal predecessors, (27896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:20,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 27896 transitions. [2021-07-13 19:15:20,412 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 27896 transitions. Word has length 53 [2021-07-13 19:15:20,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:20,413 INFO L482 AbstractCegarLoop]: Abstraction has 10496 states and 27896 transitions. [2021-07-13 19:15:20,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:20,413 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 27896 transitions. [2021-07-13 19:15:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:20,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:20,424 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:20,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-07-13 19:15:20,637 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1194965254, now seen corresponding path program 76 times [2021-07-13 19:15:20,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:20,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902600996] [2021-07-13 19:15:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:20,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:20,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902600996] [2021-07-13 19:15:20,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902600996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:20,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126901141] [2021-07-13 19:15:20,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:20,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:20,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:20,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:20,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:20,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126901141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:20,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:20,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:15:20,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100762949] [2021-07-13 19:15:20,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:20,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:20,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:20,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:20,877 INFO L87 Difference]: Start difference. First operand 10496 states and 27896 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:21,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:21,336 INFO L93 Difference]: Finished difference Result 11930 states and 30766 transitions. [2021-07-13 19:15:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:21,355 INFO L225 Difference]: With dead ends: 11930 [2021-07-13 19:15:21,356 INFO L226 Difference]: Without dead ends: 11885 [2021-07-13 19:15:21,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:21,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11885 states. [2021-07-13 19:15:21,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11885 to 10613. [2021-07-13 19:15:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 2.6563324538258577) internal successors, (28189), 10612 states have internal predecessors, (28189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 28189 transitions. [2021-07-13 19:15:21,536 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 28189 transitions. Word has length 53 [2021-07-13 19:15:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:21,536 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 28189 transitions. [2021-07-13 19:15:21,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 28189 transitions. [2021-07-13 19:15:21,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:21,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:21,546 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:21,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:21,762 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:21,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:21,762 INFO L82 PathProgramCache]: Analyzing trace with hash -358731603, now seen corresponding path program 160 times [2021-07-13 19:15:21,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:21,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552034339] [2021-07-13 19:15:21,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:21,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552034339] [2021-07-13 19:15:21,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552034339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571225791] [2021-07-13 19:15:21,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:21,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:21,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:21,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:21,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:21,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571225791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:21,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:21,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:15:21,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622222257] [2021-07-13 19:15:21,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:15:21,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:21,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:15:21,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:15:21,920 INFO L87 Difference]: Start difference. First operand 10613 states and 28189 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:22,080 INFO L93 Difference]: Finished difference Result 11953 states and 30528 transitions. [2021-07-13 19:15:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:22,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:22,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:22,099 INFO L225 Difference]: With dead ends: 11953 [2021-07-13 19:15:22,099 INFO L226 Difference]: Without dead ends: 11950 [2021-07-13 19:15:22,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11950 states. [2021-07-13 19:15:22,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11950 to 10587. [2021-07-13 19:15:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.65397695068959) internal successors, (28095), 10586 states have internal predecessors, (28095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:22,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 28095 transitions. [2021-07-13 19:15:22,341 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 28095 transitions. Word has length 53 [2021-07-13 19:15:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:22,341 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 28095 transitions. [2021-07-13 19:15:22,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 28095 transitions. [2021-07-13 19:15:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:22,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:22,351 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:22,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:22,567 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:22,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash -151669037, now seen corresponding path program 161 times [2021-07-13 19:15:22,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:22,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15394760] [2021-07-13 19:15:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:22,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:22,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15394760] [2021-07-13 19:15:22,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15394760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:22,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824506175] [2021-07-13 19:15:22,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:22,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:15:22,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:22,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:22,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824506175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:22,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:22,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-07-13 19:15:22,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817135617] [2021-07-13 19:15:22,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:15:22,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:22,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:15:22,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:22,796 INFO L87 Difference]: Start difference. First operand 10587 states and 28095 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:23,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:23,157 INFO L93 Difference]: Finished difference Result 12225 states and 31030 transitions. [2021-07-13 19:15:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:23,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:23,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:23,195 INFO L225 Difference]: With dead ends: 12225 [2021-07-13 19:15:23,195 INFO L226 Difference]: Without dead ends: 12207 [2021-07-13 19:15:23,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 101.7ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:15:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2021-07-13 19:15:23,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 10208. [2021-07-13 19:15:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10208 states, 10207 states have (on average 2.6436759086901147) internal successors, (26984), 10207 states have internal predecessors, (26984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 26984 transitions. [2021-07-13 19:15:23,389 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 26984 transitions. Word has length 53 [2021-07-13 19:15:23,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:23,389 INFO L482 AbstractCegarLoop]: Abstraction has 10208 states and 26984 transitions. [2021-07-13 19:15:23,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:23,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 26984 transitions. [2021-07-13 19:15:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:23,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:23,399 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:23,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:23,599 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:23,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1599669050, now seen corresponding path program 162 times [2021-07-13 19:15:23,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:23,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522465992] [2021-07-13 19:15:23,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:23,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:23,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522465992] [2021-07-13 19:15:23,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522465992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:23,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850724774] [2021-07-13 19:15:23,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:23,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:15:23,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:23,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:15:23,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:23,896 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:15:23,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-07-13 19:15:23,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:15:23,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:15:23,918 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:15:23,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:15:23,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2021-07-13 19:15:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:23,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850724774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:23,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:23,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-07-13 19:15:23,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837357615] [2021-07-13 19:15:23,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:15:23,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:23,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:15:23,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:23,958 INFO L87 Difference]: Start difference. First operand 10208 states and 26984 transitions. Second operand has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:26,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:26,354 INFO L93 Difference]: Finished difference Result 13433 states and 33117 transitions. [2021-07-13 19:15:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-13 19:15:26,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:26,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:26,377 INFO L225 Difference]: With dead ends: 13433 [2021-07-13 19:15:26,378 INFO L226 Difference]: Without dead ends: 13411 [2021-07-13 19:15:26,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 1471.1ms TimeCoverageRelationStatistics Valid=1527, Invalid=7403, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 19:15:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13411 states. [2021-07-13 19:15:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13411 to 10206. [2021-07-13 19:15:26,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10206 states, 10205 states have (on average 2.6425281724644782) internal successors, (26967), 10205 states have internal predecessors, (26967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10206 states to 10206 states and 26967 transitions. [2021-07-13 19:15:26,552 INFO L78 Accepts]: Start accepts. Automaton has 10206 states and 26967 transitions. Word has length 53 [2021-07-13 19:15:26,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:26,552 INFO L482 AbstractCegarLoop]: Abstraction has 10206 states and 26967 transitions. [2021-07-13 19:15:26,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 10206 states and 26967 transitions. [2021-07-13 19:15:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:26,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:26,561 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:26,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:26,761 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2081762066, now seen corresponding path program 163 times [2021-07-13 19:15:26,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:26,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927450864] [2021-07-13 19:15:26,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:26,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:26,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927450864] [2021-07-13 19:15:26,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927450864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:26,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611981035] [2021-07-13 19:15:26,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:26,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:26,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611981035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:26,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:26,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:15:26,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694187942] [2021-07-13 19:15:26,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:26,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:26,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:26,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:26,959 INFO L87 Difference]: Start difference. First operand 10206 states and 26967 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:27,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:27,385 INFO L93 Difference]: Finished difference Result 11323 states and 29185 transitions. [2021-07-13 19:15:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:27,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:27,402 INFO L225 Difference]: With dead ends: 11323 [2021-07-13 19:15:27,403 INFO L226 Difference]: Without dead ends: 11323 [2021-07-13 19:15:27,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11323 states. [2021-07-13 19:15:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11323 to 10216. [2021-07-13 19:15:27,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6420949583945177) internal successors, (26989), 10215 states have internal predecessors, (26989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26989 transitions. [2021-07-13 19:15:27,565 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26989 transitions. Word has length 53 [2021-07-13 19:15:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:27,565 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26989 transitions. [2021-07-13 19:15:27,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26989 transitions. [2021-07-13 19:15:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:27,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:27,575 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:27,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-13 19:15:27,776 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash -71287896, now seen corresponding path program 164 times [2021-07-13 19:15:27,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:27,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124118734] [2021-07-13 19:15:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:27,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:27,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124118734] [2021-07-13 19:15:27,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124118734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:27,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939852333] [2021-07-13 19:15:27,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:27,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:27,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:27,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:27,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939852333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:27,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:27,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:15:27,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074099429] [2021-07-13 19:15:27,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:15:27,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:27,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:15:27,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:27,953 INFO L87 Difference]: Start difference. First operand 10216 states and 26989 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:28,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:28,511 INFO L93 Difference]: Finished difference Result 11942 states and 30505 transitions. [2021-07-13 19:15:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:28,511 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:28,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:28,530 INFO L225 Difference]: With dead ends: 11942 [2021-07-13 19:15:28,530 INFO L226 Difference]: Without dead ends: 11942 [2021-07-13 19:15:28,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11942 states. [2021-07-13 19:15:28,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11942 to 10248. [2021-07-13 19:15:28,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10248 states, 10247 states have (on average 2.641163267297746) internal successors, (27064), 10247 states have internal predecessors, (27064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 27064 transitions. [2021-07-13 19:15:28,693 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 27064 transitions. Word has length 53 [2021-07-13 19:15:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:28,694 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 27064 transitions. [2021-07-13 19:15:28,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 27064 transitions. [2021-07-13 19:15:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:28,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:28,703 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:28,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:28,903 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:28,903 INFO L82 PathProgramCache]: Analyzing trace with hash -309349413, now seen corresponding path program 77 times [2021-07-13 19:15:28,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:28,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724413228] [2021-07-13 19:15:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:28,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:28,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724413228] [2021-07-13 19:15:28,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724413228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:28,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705120110] [2021-07-13 19:15:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:28,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:15:28,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:28,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:28,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:29,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705120110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:29,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:29,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-07-13 19:15:29,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696386501] [2021-07-13 19:15:29,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:29,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:29,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:29,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:29,073 INFO L87 Difference]: Start difference. First operand 10248 states and 27064 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:29,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:29,267 INFO L93 Difference]: Finished difference Result 13713 states and 34190 transitions. [2021-07-13 19:15:29,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:15:29,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:29,290 INFO L225 Difference]: With dead ends: 13713 [2021-07-13 19:15:29,290 INFO L226 Difference]: Without dead ends: 13705 [2021-07-13 19:15:29,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13705 states. [2021-07-13 19:15:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13705 to 10512. [2021-07-13 19:15:29,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10512 states, 10511 states have (on average 2.6529350204547617) internal successors, (27885), 10511 states have internal predecessors, (27885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10512 states to 10512 states and 27885 transitions. [2021-07-13 19:15:29,485 INFO L78 Accepts]: Start accepts. Automaton has 10512 states and 27885 transitions. Word has length 53 [2021-07-13 19:15:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:29,485 INFO L482 AbstractCegarLoop]: Abstraction has 10512 states and 27885 transitions. [2021-07-13 19:15:29,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10512 states and 27885 transitions. [2021-07-13 19:15:29,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:29,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:29,496 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:29,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-13 19:15:29,696 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash -931229823, now seen corresponding path program 78 times [2021-07-13 19:15:29,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:29,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633447572] [2021-07-13 19:15:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:29,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:29,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633447572] [2021-07-13 19:15:29,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633447572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:29,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666390347] [2021-07-13 19:15:29,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:29,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:15:29,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:29,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:29,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666390347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:29,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:29,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-07-13 19:15:29,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051637064] [2021-07-13 19:15:29,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:29,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:29,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:29,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:29,870 INFO L87 Difference]: Start difference. First operand 10512 states and 27885 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:30,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:30,079 INFO L93 Difference]: Finished difference Result 15140 states and 37466 transitions. [2021-07-13 19:15:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:15:30,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:30,104 INFO L225 Difference]: With dead ends: 15140 [2021-07-13 19:15:30,104 INFO L226 Difference]: Without dead ends: 15140 [2021-07-13 19:15:30,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-07-13 19:15:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 10520. [2021-07-13 19:15:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10520 states, 10519 states have (on average 2.6527236429318375) internal successors, (27904), 10519 states have internal predecessors, (27904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 27904 transitions. [2021-07-13 19:15:30,311 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 27904 transitions. Word has length 53 [2021-07-13 19:15:30,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:30,311 INFO L482 AbstractCegarLoop]: Abstraction has 10520 states and 27904 transitions. [2021-07-13 19:15:30,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 27904 transitions. [2021-07-13 19:15:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:30,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:30,321 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:30,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:30,522 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:30,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:30,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1726165017, now seen corresponding path program 79 times [2021-07-13 19:15:30,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:30,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496785230] [2021-07-13 19:15:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:30,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:30,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496785230] [2021-07-13 19:15:30,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496785230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:30,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624821639] [2021-07-13 19:15:30,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:30,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:30,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:30,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624821639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:30,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:30,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:15:30,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999608461] [2021-07-13 19:15:30,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:15:30,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:30,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:15:30,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:30,741 INFO L87 Difference]: Start difference. First operand 10520 states and 27904 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:30,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:30,958 INFO L93 Difference]: Finished difference Result 13839 states and 34594 transitions. [2021-07-13 19:15:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:15:30,958 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:30,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:30,983 INFO L225 Difference]: With dead ends: 13839 [2021-07-13 19:15:30,984 INFO L226 Difference]: Without dead ends: 13839 [2021-07-13 19:15:30,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-07-13 19:15:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 10344. [2021-07-13 19:15:31,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10344 states, 10343 states have (on average 2.6458474330465047) internal successors, (27366), 10343 states have internal predecessors, (27366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 27366 transitions. [2021-07-13 19:15:31,168 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 27366 transitions. Word has length 53 [2021-07-13 19:15:31,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:31,168 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 27366 transitions. [2021-07-13 19:15:31,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,168 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 27366 transitions. [2021-07-13 19:15:31,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:31,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:31,178 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:31,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:31,378 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:31,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1133718440, now seen corresponding path program 80 times [2021-07-13 19:15:31,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:31,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690442947] [2021-07-13 19:15:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:31,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:31,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690442947] [2021-07-13 19:15:31,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690442947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:31,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598597390] [2021-07-13 19:15:31,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:31,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:31,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:31,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:31,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598597390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:31,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:31,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:15:31,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642536981] [2021-07-13 19:15:31,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:15:31,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:15:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:31,586 INFO L87 Difference]: Start difference. First operand 10344 states and 27366 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:32,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:32,187 INFO L93 Difference]: Finished difference Result 10977 states and 28511 transitions. [2021-07-13 19:15:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:32,187 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:32,204 INFO L225 Difference]: With dead ends: 10977 [2021-07-13 19:15:32,205 INFO L226 Difference]: Without dead ends: 10881 [2021-07-13 19:15:32,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-07-13 19:15:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 10343. [2021-07-13 19:15:32,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 2.6447495648810673) internal successors, (27352), 10342 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27352 transitions. [2021-07-13 19:15:32,362 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27352 transitions. Word has length 53 [2021-07-13 19:15:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:32,362 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27352 transitions. [2021-07-13 19:15:32,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27352 transitions. [2021-07-13 19:15:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:32,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:32,372 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:32,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:32,572 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:32,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:32,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1461271213, now seen corresponding path program 165 times [2021-07-13 19:15:32,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:32,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606054621] [2021-07-13 19:15:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:32,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:32,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606054621] [2021-07-13 19:15:32,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606054621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556337177] [2021-07-13 19:15:32,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:32,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:15:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:32,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:32,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556337177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:32,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:32,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:15:32,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386195579] [2021-07-13 19:15:32,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:15:32,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:32,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:15:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:32,735 INFO L87 Difference]: Start difference. First operand 10343 states and 27352 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:32,928 INFO L93 Difference]: Finished difference Result 11313 states and 29024 transitions. [2021-07-13 19:15:32,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:15:32,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:32,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:32,946 INFO L225 Difference]: With dead ends: 11313 [2021-07-13 19:15:32,946 INFO L226 Difference]: Without dead ends: 11295 [2021-07-13 19:15:32,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-07-13 19:15:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 10343. [2021-07-13 19:15:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 2.643782633919938) internal successors, (27342), 10342 states have internal predecessors, (27342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27342 transitions. [2021-07-13 19:15:33,167 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27342 transitions. Word has length 53 [2021-07-13 19:15:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:33,167 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27342 transitions. [2021-07-13 19:15:33,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27342 transitions. [2021-07-13 19:15:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:33,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:33,177 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:33,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:33,377 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1403224534, now seen corresponding path program 81 times [2021-07-13 19:15:33,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:33,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642078093] [2021-07-13 19:15:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:33,461 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:33,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:33,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642078093] [2021-07-13 19:15:33,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642078093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:33,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810060265] [2021-07-13 19:15:33,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:33,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:15:33,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:33,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:33,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:33,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810060265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:33,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:33,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:15:33,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631054951] [2021-07-13 19:15:33,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:33,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:33,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:33,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:33,570 INFO L87 Difference]: Start difference. First operand 10343 states and 27342 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:33,962 INFO L93 Difference]: Finished difference Result 11804 states and 30259 transitions. [2021-07-13 19:15:33,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:33,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:33,979 INFO L225 Difference]: With dead ends: 11804 [2021-07-13 19:15:33,979 INFO L226 Difference]: Without dead ends: 11766 [2021-07-13 19:15:33,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11766 states. [2021-07-13 19:15:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11766 to 10492. [2021-07-13 19:15:34,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10492 states, 10491 states have (on average 2.6421694786007053) internal successors, (27719), 10491 states have internal predecessors, (27719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:34,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10492 states to 10492 states and 27719 transitions. [2021-07-13 19:15:34,146 INFO L78 Accepts]: Start accepts. Automaton has 10492 states and 27719 transitions. Word has length 53 [2021-07-13 19:15:34,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:34,146 INFO L482 AbstractCegarLoop]: Abstraction has 10492 states and 27719 transitions. [2021-07-13 19:15:34,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:34,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10492 states and 27719 transitions. [2021-07-13 19:15:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:34,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:34,155 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:34,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-13 19:15:34,356 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:34,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:34,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1338045905, now seen corresponding path program 166 times [2021-07-13 19:15:34,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:34,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509383001] [2021-07-13 19:15:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:34,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:34,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509383001] [2021-07-13 19:15:34,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509383001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:34,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365260133] [2021-07-13 19:15:34,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:34,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:34,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:34,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365260133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:34,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:34,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:15:34,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273226202] [2021-07-13 19:15:34,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:15:34,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:34,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:15:34,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:15:34,502 INFO L87 Difference]: Start difference. First operand 10492 states and 27719 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:34,645 INFO L93 Difference]: Finished difference Result 12007 states and 30378 transitions. [2021-07-13 19:15:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:34,664 INFO L225 Difference]: With dead ends: 12007 [2021-07-13 19:15:34,665 INFO L226 Difference]: Without dead ends: 12004 [2021-07-13 19:15:34,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2021-07-13 19:15:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 10472. [2021-07-13 19:15:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10472 states, 10471 states have (on average 2.639957979180594) internal successors, (27643), 10471 states have internal predecessors, (27643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27643 transitions. [2021-07-13 19:15:34,836 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27643 transitions. Word has length 53 [2021-07-13 19:15:34,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:34,836 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27643 transitions. [2021-07-13 19:15:34,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:34,836 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27643 transitions. [2021-07-13 19:15:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:34,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:34,847 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:35,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-07-13 19:15:35,048 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:35,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1545108471, now seen corresponding path program 167 times [2021-07-13 19:15:35,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:35,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820965978] [2021-07-13 19:15:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:35,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:35,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820965978] [2021-07-13 19:15:35,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820965978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:35,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526477273] [2021-07-13 19:15:35,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:35,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:15:35,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:35,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:35,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:35,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526477273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:35,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:35,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-07-13 19:15:35,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105226324] [2021-07-13 19:15:35,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:35,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:35,243 INFO L87 Difference]: Start difference. First operand 10472 states and 27643 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:35,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:35,513 INFO L93 Difference]: Finished difference Result 12244 states and 30811 transitions. [2021-07-13 19:15:35,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:35,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:35,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:35,533 INFO L225 Difference]: With dead ends: 12244 [2021-07-13 19:15:35,533 INFO L226 Difference]: Without dead ends: 12226 [2021-07-13 19:15:35,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:35,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12226 states. [2021-07-13 19:15:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12226 to 10472. [2021-07-13 19:15:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10472 states, 10471 states have (on average 2.6376659344857223) internal successors, (27619), 10471 states have internal predecessors, (27619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27619 transitions. [2021-07-13 19:15:35,736 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27619 transitions. Word has length 53 [2021-07-13 19:15:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:35,737 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27619 transitions. [2021-07-13 19:15:35,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27619 transitions. [2021-07-13 19:15:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:35,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:35,747 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:35,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:35,948 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash 97108458, now seen corresponding path program 168 times [2021-07-13 19:15:35,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:35,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655880891] [2021-07-13 19:15:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:36,022 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:36,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:36,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655880891] [2021-07-13 19:15:36,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655880891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:36,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801303782] [2021-07-13 19:15:36,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:36,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:15:36,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:36,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801303782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:36,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:36,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:15:36,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802725949] [2021-07-13 19:15:36,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:36,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:36,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:36,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:36,149 INFO L87 Difference]: Start difference. First operand 10472 states and 27619 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:36,707 INFO L93 Difference]: Finished difference Result 11210 states and 28930 transitions. [2021-07-13 19:15:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:36,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:36,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:36,724 INFO L225 Difference]: With dead ends: 11210 [2021-07-13 19:15:36,724 INFO L226 Difference]: Without dead ends: 11154 [2021-07-13 19:15:36,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:36,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-07-13 19:15:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 10444. [2021-07-13 19:15:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 2.63497079383319) internal successors, (27517), 10443 states have internal predecessors, (27517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 27517 transitions. [2021-07-13 19:15:36,896 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 27517 transitions. Word has length 53 [2021-07-13 19:15:36,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:36,896 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 27517 transitions. [2021-07-13 19:15:36,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:36,896 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 27517 transitions. [2021-07-13 19:15:36,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:36,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:36,906 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:37,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-07-13 19:15:37,107 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:37,107 INFO L82 PathProgramCache]: Analyzing trace with hash -516427722, now seen corresponding path program 169 times [2021-07-13 19:15:37,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:37,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873039276] [2021-07-13 19:15:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:37,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:37,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873039276] [2021-07-13 19:15:37,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873039276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:37,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398741820] [2021-07-13 19:15:37,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:37,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:37,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:37,287 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:37,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398741820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:37,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:37,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:15:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129926215] [2021-07-13 19:15:37,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:37,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:37,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:37,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:37,288 INFO L87 Difference]: Start difference. First operand 10444 states and 27517 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:37,694 INFO L93 Difference]: Finished difference Result 11584 states and 29771 transitions. [2021-07-13 19:15:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:37,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:37,715 INFO L225 Difference]: With dead ends: 11584 [2021-07-13 19:15:37,715 INFO L226 Difference]: Without dead ends: 11572 [2021-07-13 19:15:37,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-07-13 19:15:37,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 10490. [2021-07-13 19:15:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10490 states, 10489 states have (on average 2.6332348174277813) internal successors, (27620), 10489 states have internal predecessors, (27620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10490 states to 10490 states and 27620 transitions. [2021-07-13 19:15:37,886 INFO L78 Accepts]: Start accepts. Automaton has 10490 states and 27620 transitions. Word has length 53 [2021-07-13 19:15:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:37,886 INFO L482 AbstractCegarLoop]: Abstraction has 10490 states and 27620 transitions. [2021-07-13 19:15:37,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 10490 states and 27620 transitions. [2021-07-13 19:15:37,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:37,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:37,895 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:38,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:38,096 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:38,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1625489612, now seen corresponding path program 170 times [2021-07-13 19:15:38,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:38,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961355928] [2021-07-13 19:15:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:38,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:38,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961355928] [2021-07-13 19:15:38,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961355928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:38,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731569472] [2021-07-13 19:15:38,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:38,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:38,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731569472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:38,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:38,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:15:38,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780391902] [2021-07-13 19:15:38,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:15:38,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:38,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:15:38,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:38,322 INFO L87 Difference]: Start difference. First operand 10490 states and 27620 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:38,867 INFO L93 Difference]: Finished difference Result 12749 states and 32307 transitions. [2021-07-13 19:15:38,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:15:38,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:38,888 INFO L225 Difference]: With dead ends: 12749 [2021-07-13 19:15:38,888 INFO L226 Difference]: Without dead ends: 12707 [2021-07-13 19:15:38,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:15:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-07-13 19:15:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 10549. [2021-07-13 19:15:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10549 states, 10548 states have (on average 2.6331058020477816) internal successors, (27774), 10548 states have internal predecessors, (27774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 27774 transitions. [2021-07-13 19:15:39,071 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 27774 transitions. Word has length 53 [2021-07-13 19:15:39,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:39,072 INFO L482 AbstractCegarLoop]: Abstraction has 10549 states and 27774 transitions. [2021-07-13 19:15:39,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 27774 transitions. [2021-07-13 19:15:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:39,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:39,082 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:39,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:39,282 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1136918575, now seen corresponding path program 171 times [2021-07-13 19:15:39,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:39,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923055319] [2021-07-13 19:15:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:39,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:39,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923055319] [2021-07-13 19:15:39,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923055319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:39,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932730489] [2021-07-13 19:15:39,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:39,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:15:39,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:39,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:39,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:39,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932730489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:39,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:39,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:15:39,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772995122] [2021-07-13 19:15:39,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:15:39,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:39,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:15:39,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:39,448 INFO L87 Difference]: Start difference. First operand 10549 states and 27774 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:39,675 INFO L93 Difference]: Finished difference Result 12080 states and 30433 transitions. [2021-07-13 19:15:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:39,698 INFO L225 Difference]: With dead ends: 12080 [2021-07-13 19:15:39,698 INFO L226 Difference]: Without dead ends: 12056 [2021-07-13 19:15:39,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:39,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2021-07-13 19:15:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 10182. [2021-07-13 19:15:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 10181 states have (on average 2.6232197230134564) internal successors, (26707), 10181 states have internal predecessors, (26707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 26707 transitions. [2021-07-13 19:15:39,875 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 26707 transitions. Word has length 53 [2021-07-13 19:15:39,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:39,875 INFO L482 AbstractCegarLoop]: Abstraction has 10182 states and 26707 transitions. [2021-07-13 19:15:39,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,875 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 26707 transitions. [2021-07-13 19:15:39,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:39,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:39,885 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:40,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:40,086 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:40,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:40,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1780326146, now seen corresponding path program 172 times [2021-07-13 19:15:40,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:40,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698855811] [2021-07-13 19:15:40,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:40,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:40,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698855811] [2021-07-13 19:15:40,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698855811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:40,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501786883] [2021-07-13 19:15:40,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:40,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:40,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:40,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:40,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:40,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501786883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:40,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:40,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:15:40,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273972745] [2021-07-13 19:15:40,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:15:40,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:40,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:15:40,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:40,276 INFO L87 Difference]: Start difference. First operand 10182 states and 26707 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:40,809 INFO L93 Difference]: Finished difference Result 12810 states and 32153 transitions. [2021-07-13 19:15:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:40,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:40,830 INFO L225 Difference]: With dead ends: 12810 [2021-07-13 19:15:40,830 INFO L226 Difference]: Without dead ends: 12756 [2021-07-13 19:15:40,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:15:40,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2021-07-13 19:15:40,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 10143. [2021-07-13 19:15:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10143 states, 10142 states have (on average 2.620291855649773) internal successors, (26575), 10142 states have internal predecessors, (26575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 26575 transitions. [2021-07-13 19:15:41,018 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 26575 transitions. Word has length 53 [2021-07-13 19:15:41,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:41,018 INFO L482 AbstractCegarLoop]: Abstraction has 10143 states and 26575 transitions. [2021-07-13 19:15:41,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:41,018 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 26575 transitions. [2021-07-13 19:15:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:41,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:41,030 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:41,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-07-13 19:15:41,230 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:41,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1542264629, now seen corresponding path program 82 times [2021-07-13 19:15:41,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:41,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336125626] [2021-07-13 19:15:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:41,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:41,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336125626] [2021-07-13 19:15:41,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336125626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:41,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968208867] [2021-07-13 19:15:41,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:41,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:41,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:41,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:41,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968208867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:41,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:41,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:15:41,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247987706] [2021-07-13 19:15:41,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:15:41,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:41,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:15:41,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:41,413 INFO L87 Difference]: Start difference. First operand 10143 states and 26575 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:41,606 INFO L93 Difference]: Finished difference Result 13236 states and 32994 transitions. [2021-07-13 19:15:41,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:15:41,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:41,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:41,628 INFO L225 Difference]: With dead ends: 13236 [2021-07-13 19:15:41,628 INFO L226 Difference]: Without dead ends: 13222 [2021-07-13 19:15:41,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:41,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-07-13 19:15:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 10426. [2021-07-13 19:15:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10426 states, 10425 states have (on average 2.6276258992805754) internal successors, (27393), 10425 states have internal predecessors, (27393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:41,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10426 states to 10426 states and 27393 transitions. [2021-07-13 19:15:41,823 INFO L78 Accepts]: Start accepts. Automaton has 10426 states and 27393 transitions. Word has length 53 [2021-07-13 19:15:41,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:41,823 INFO L482 AbstractCegarLoop]: Abstraction has 10426 states and 27393 transitions. [2021-07-13 19:15:41,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:41,823 INFO L276 IsEmpty]: Start isEmpty. Operand 10426 states and 27393 transitions. [2021-07-13 19:15:41,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:41,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:41,833 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:42,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-07-13 19:15:42,033 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:42,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:42,034 INFO L82 PathProgramCache]: Analyzing trace with hash 920384219, now seen corresponding path program 83 times [2021-07-13 19:15:42,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:42,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376860333] [2021-07-13 19:15:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:42,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:42,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376860333] [2021-07-13 19:15:42,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376860333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:42,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412095818] [2021-07-13 19:15:42,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:42,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:15:42,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:42,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 99 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:42,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412095818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:42,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:42,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 18 [2021-07-13 19:15:42,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797193792] [2021-07-13 19:15:42,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:42,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:42,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:42,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:42,253 INFO L87 Difference]: Start difference. First operand 10426 states and 27393 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:42,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:42,602 INFO L93 Difference]: Finished difference Result 16570 states and 40721 transitions. [2021-07-13 19:15:42,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:15:42,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:42,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:42,629 INFO L225 Difference]: With dead ends: 16570 [2021-07-13 19:15:42,629 INFO L226 Difference]: Without dead ends: 16570 [2021-07-13 19:15:42,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:15:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2021-07-13 19:15:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 10440. [2021-07-13 19:15:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 2.627646326276463) internal successors, (27430), 10439 states have internal predecessors, (27430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 27430 transitions. [2021-07-13 19:15:42,835 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 27430 transitions. Word has length 53 [2021-07-13 19:15:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:42,835 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 27430 transitions. [2021-07-13 19:15:42,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 27430 transitions. [2021-07-13 19:15:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:42,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:42,846 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:43,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:43,047 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:43,047 INFO L82 PathProgramCache]: Analyzing trace with hash -717188237, now seen corresponding path program 84 times [2021-07-13 19:15:43,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:43,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867075773] [2021-07-13 19:15:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:43,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:43,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:43,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867075773] [2021-07-13 19:15:43,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867075773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:43,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763761423] [2021-07-13 19:15:43,117 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:43,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:15:43,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:43,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:43,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763761423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:43,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:43,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-07-13 19:15:43,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034589688] [2021-07-13 19:15:43,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:43,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:43,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:43,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:43,293 INFO L87 Difference]: Start difference. First operand 10440 states and 27430 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:43,537 INFO L93 Difference]: Finished difference Result 13184 states and 32800 transitions. [2021-07-13 19:15:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:15:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:43,559 INFO L225 Difference]: With dead ends: 13184 [2021-07-13 19:15:43,559 INFO L226 Difference]: Without dead ends: 13184 [2021-07-13 19:15:43,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13184 states. [2021-07-13 19:15:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13184 to 10216. [2021-07-13 19:15:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6215369554576604) internal successors, (26779), 10215 states have internal predecessors, (26779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26779 transitions. [2021-07-13 19:15:43,739 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26779 transitions. Word has length 53 [2021-07-13 19:15:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:43,739 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26779 transitions. [2021-07-13 19:15:43,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26779 transitions. [2021-07-13 19:15:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:43,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:43,750 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:43,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-07-13 19:15:43,951 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:43,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2128038473, now seen corresponding path program 173 times [2021-07-13 19:15:43,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:43,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515625194] [2021-07-13 19:15:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:44,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515625194] [2021-07-13 19:15:44,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515625194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:44,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881506540] [2021-07-13 19:15:44,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:44,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:15:44,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:44,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:44,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881506540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:44,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:44,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 17 [2021-07-13 19:15:44,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719607809] [2021-07-13 19:15:44,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:15:44,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:44,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:15:44,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:44,148 INFO L87 Difference]: Start difference. First operand 10216 states and 26779 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:44,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:44,450 INFO L93 Difference]: Finished difference Result 11730 states and 29482 transitions. [2021-07-13 19:15:44,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:44,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:44,468 INFO L225 Difference]: With dead ends: 11730 [2021-07-13 19:15:44,468 INFO L226 Difference]: Without dead ends: 11703 [2021-07-13 19:15:44,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:15:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11703 states. [2021-07-13 19:15:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11703 to 10216. [2021-07-13 19:15:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6206558981889376) internal successors, (26770), 10215 states have internal predecessors, (26770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26770 transitions. [2021-07-13 19:15:44,631 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26770 transitions. Word has length 53 [2021-07-13 19:15:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:44,631 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26770 transitions. [2021-07-13 19:15:44,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26770 transitions. [2021-07-13 19:15:44,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:44,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:44,641 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:44,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:44,841 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:44,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:44,842 INFO L82 PathProgramCache]: Analyzing trace with hash -174590330, now seen corresponding path program 85 times [2021-07-13 19:15:44,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:44,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963423063] [2021-07-13 19:15:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:44,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:44,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963423063] [2021-07-13 19:15:44,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963423063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:44,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140883991] [2021-07-13 19:15:44,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:44,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:45,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140883991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:45,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:45,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:15:45,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878714425] [2021-07-13 19:15:45,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:45,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:45,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:45,024 INFO L87 Difference]: Start difference. First operand 10216 states and 26770 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:45,442 INFO L93 Difference]: Finished difference Result 11688 states and 29696 transitions. [2021-07-13 19:15:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:45,463 INFO L225 Difference]: With dead ends: 11688 [2021-07-13 19:15:45,463 INFO L226 Difference]: Without dead ends: 11657 [2021-07-13 19:15:45,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2021-07-13 19:15:45,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 10380. [2021-07-13 19:15:45,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10380 states, 10379 states have (on average 2.618653049426727) internal successors, (27179), 10379 states have internal predecessors, (27179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 27179 transitions. [2021-07-13 19:15:45,667 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 27179 transitions. Word has length 53 [2021-07-13 19:15:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:45,667 INFO L482 AbstractCegarLoop]: Abstraction has 10380 states and 27179 transitions. [2021-07-13 19:15:45,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 27179 transitions. [2021-07-13 19:15:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:45,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:45,677 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:45,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-07-13 19:15:45,877 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:45,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1728287187, now seen corresponding path program 174 times [2021-07-13 19:15:45,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:45,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814667996] [2021-07-13 19:15:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:45,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814667996] [2021-07-13 19:15:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814667996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796013133] [2021-07-13 19:15:45,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:45,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:15:45,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:45,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:45,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:46,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796013133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:46,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:46,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:15:46,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834586765] [2021-07-13 19:15:46,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:15:46,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:46,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:15:46,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:15:46,026 INFO L87 Difference]: Start difference. First operand 10380 states and 27179 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:46,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:46,172 INFO L93 Difference]: Finished difference Result 12057 states and 30158 transitions. [2021-07-13 19:15:46,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:46,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:46,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:46,193 INFO L225 Difference]: With dead ends: 12057 [2021-07-13 19:15:46,193 INFO L226 Difference]: Without dead ends: 12054 [2021-07-13 19:15:46,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2021-07-13 19:15:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 10366. [2021-07-13 19:15:46,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 2.6167872648335746) internal successors, (27123), 10365 states have internal predecessors, (27123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:46,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27123 transitions. [2021-07-13 19:15:46,364 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27123 transitions. Word has length 53 [2021-07-13 19:15:46,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:46,364 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27123 transitions. [2021-07-13 19:15:46,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27123 transitions. [2021-07-13 19:15:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:46,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:46,374 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:46,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-07-13 19:15:46,574 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:46,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1521224621, now seen corresponding path program 175 times [2021-07-13 19:15:46,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:46,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771442877] [2021-07-13 19:15:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:46,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:46,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771442877] [2021-07-13 19:15:46,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771442877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:46,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117054914] [2021-07-13 19:15:46,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:46,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:46,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:46,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117054914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:46,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:46,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:15:46,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49382073] [2021-07-13 19:15:46,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:46,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:46,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:46,743 INFO L87 Difference]: Start difference. First operand 10366 states and 27123 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:46,933 INFO L93 Difference]: Finished difference Result 12079 states and 30151 transitions. [2021-07-13 19:15:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:46,952 INFO L225 Difference]: With dead ends: 12079 [2021-07-13 19:15:46,952 INFO L226 Difference]: Without dead ends: 12061 [2021-07-13 19:15:46,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12061 states. [2021-07-13 19:15:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12061 to 10366. [2021-07-13 19:15:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 2.6144717800289436) internal successors, (27099), 10365 states have internal predecessors, (27099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27099 transitions. [2021-07-13 19:15:47,117 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27099 transitions. Word has length 53 [2021-07-13 19:15:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:47,117 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27099 transitions. [2021-07-13 19:15:47,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27099 transitions. [2021-07-13 19:15:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:47,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:47,128 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:47,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:47,328 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1325742662, now seen corresponding path program 176 times [2021-07-13 19:15:47,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:47,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922150483] [2021-07-13 19:15:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:47,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:47,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922150483] [2021-07-13 19:15:47,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922150483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:47,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780531453] [2021-07-13 19:15:47,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:47,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:47,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:47,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:47,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:47,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780531453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:47,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:47,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:15:47,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531752054] [2021-07-13 19:15:47,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:47,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:47,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:47,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:47,512 INFO L87 Difference]: Start difference. First operand 10366 states and 27099 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:48,131 INFO L93 Difference]: Finished difference Result 11156 states and 28494 transitions. [2021-07-13 19:15:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:48,131 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:48,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:48,151 INFO L225 Difference]: With dead ends: 11156 [2021-07-13 19:15:48,151 INFO L226 Difference]: Without dead ends: 11082 [2021-07-13 19:15:48,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2021-07-13 19:15:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 10344. [2021-07-13 19:15:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10344 states, 10343 states have (on average 2.61026781398047) internal successors, (26998), 10343 states have internal predecessors, (26998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 26998 transitions. [2021-07-13 19:15:48,335 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 26998 transitions. Word has length 53 [2021-07-13 19:15:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:48,335 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 26998 transitions. [2021-07-13 19:15:48,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 26998 transitions. [2021-07-13 19:15:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:48,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:48,346 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:48,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:48,549 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:48,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:48,549 INFO L82 PathProgramCache]: Analyzing trace with hash 712206482, now seen corresponding path program 177 times [2021-07-13 19:15:48,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:48,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071274490] [2021-07-13 19:15:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:48,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:48,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071274490] [2021-07-13 19:15:48,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071274490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:48,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430925212] [2021-07-13 19:15:48,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:48,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:15:48,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:48,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:48,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:48,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430925212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:48,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:48,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:15:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851286612] [2021-07-13 19:15:48,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:48,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:48,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:48,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:48,759 INFO L87 Difference]: Start difference. First operand 10344 states and 26998 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:49,206 INFO L93 Difference]: Finished difference Result 11598 states and 29476 transitions. [2021-07-13 19:15:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:49,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:49,225 INFO L225 Difference]: With dead ends: 11598 [2021-07-13 19:15:49,225 INFO L226 Difference]: Without dead ends: 11586 [2021-07-13 19:15:49,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2021-07-13 19:15:49,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 10414. [2021-07-13 19:15:49,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10414 states, 10413 states have (on average 2.6087582829155864) internal successors, (27165), 10413 states have internal predecessors, (27165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 27165 transitions. [2021-07-13 19:15:49,410 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 27165 transitions. Word has length 53 [2021-07-13 19:15:49,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:49,410 INFO L482 AbstractCegarLoop]: Abstraction has 10414 states and 27165 transitions. [2021-07-13 19:15:49,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,410 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 27165 transitions. [2021-07-13 19:15:49,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:49,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:49,421 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:49,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-07-13 19:15:49,621 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:49,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:49,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1440843480, now seen corresponding path program 178 times [2021-07-13 19:15:49,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:49,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193134543] [2021-07-13 19:15:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:49,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:49,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193134543] [2021-07-13 19:15:49,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193134543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:49,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284885171] [2021-07-13 19:15:49,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:49,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:49,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:49,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:49,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:49,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284885171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:49,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:49,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:15:49,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637144541] [2021-07-13 19:15:49,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:15:49,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:49,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:15:49,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:49,796 INFO L87 Difference]: Start difference. First operand 10414 states and 27165 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,384 INFO L93 Difference]: Finished difference Result 13130 states and 32846 transitions. [2021-07-13 19:15:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:15:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,409 INFO L225 Difference]: With dead ends: 13130 [2021-07-13 19:15:50,409 INFO L226 Difference]: Without dead ends: 13076 [2021-07-13 19:15:50,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:15:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13076 states. [2021-07-13 19:15:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13076 to 10595. [2021-07-13 19:15:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 2.60911836888805) internal successors, (27641), 10594 states have internal predecessors, (27641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27641 transitions. [2021-07-13 19:15:50,599 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27641 transitions. Word has length 53 [2021-07-13 19:15:50,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,599 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27641 transitions. [2021-07-13 19:15:50,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,599 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27641 transitions. [2021-07-13 19:15:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:50,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,609 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-13 19:15:50,810 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,810 INFO L82 PathProgramCache]: Analyzing trace with hash 91715629, now seen corresponding path program 179 times [2021-07-13 19:15:50,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784378758] [2021-07-13 19:15:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:50,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784378758] [2021-07-13 19:15:50,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784378758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100564131] [2021-07-13 19:15:50,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:50,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:15:50,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:50,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:50,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:51,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100564131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:51,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:51,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 15 [2021-07-13 19:15:51,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568817306] [2021-07-13 19:15:51,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:15:51,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:51,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:15:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:51,050 INFO L87 Difference]: Start difference. First operand 10595 states and 27641 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:51,348 INFO L93 Difference]: Finished difference Result 12473 states and 30997 transitions. [2021-07-13 19:15:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:15:51,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:51,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:51,369 INFO L225 Difference]: With dead ends: 12473 [2021-07-13 19:15:51,369 INFO L226 Difference]: Without dead ends: 12449 [2021-07-13 19:15:51,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-07-13 19:15:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 10595. [2021-07-13 19:15:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 2.6075136869926374) internal successors, (27624), 10594 states have internal predecessors, (27624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27624 transitions. [2021-07-13 19:15:51,550 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27624 transitions. Word has length 53 [2021-07-13 19:15:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:51,550 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27624 transitions. [2021-07-13 19:15:51,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,550 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27624 transitions. [2021-07-13 19:15:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:51,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:51,560 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:51,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:51,761 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:51,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:51,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1286006946, now seen corresponding path program 180 times [2021-07-13 19:15:51,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:51,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403335949] [2021-07-13 19:15:51,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:51,869 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:51,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:51,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403335949] [2021-07-13 19:15:51,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403335949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:51,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237839042] [2021-07-13 19:15:51,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:51,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 19:15:51,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:51,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:51,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237839042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:51,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:51,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:15:51,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401189917] [2021-07-13 19:15:51,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:15:51,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:51,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:15:51,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:51,974 INFO L87 Difference]: Start difference. First operand 10595 states and 27624 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:52,703 INFO L93 Difference]: Finished difference Result 15502 states and 38128 transitions. [2021-07-13 19:15:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:15:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:52,727 INFO L225 Difference]: With dead ends: 15502 [2021-07-13 19:15:52,727 INFO L226 Difference]: Without dead ends: 15388 [2021-07-13 19:15:52,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:15:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2021-07-13 19:15:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 10752. [2021-07-13 19:15:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10752 states, 10751 states have (on average 2.607943447121198) internal successors, (28038), 10751 states have internal predecessors, (28038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10752 states to 10752 states and 28038 transitions. [2021-07-13 19:15:52,916 INFO L78 Accepts]: Start accepts. Automaton has 10752 states and 28038 transitions. Word has length 53 [2021-07-13 19:15:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:52,916 INFO L482 AbstractCegarLoop]: Abstraction has 10752 states and 28038 transitions. [2021-07-13 19:15:52,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 10752 states and 28038 transitions. [2021-07-13 19:15:52,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:52,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:52,926 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:53,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:53,127 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:53,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:53,127 INFO L82 PathProgramCache]: Analyzing trace with hash -899404269, now seen corresponding path program 181 times [2021-07-13 19:15:53,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:53,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784571650] [2021-07-13 19:15:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:53,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784571650] [2021-07-13 19:15:53,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784571650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:53,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152368642] [2021-07-13 19:15:53,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:53,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:53,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:53,304 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:53,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152368642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:53,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:53,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:15:53,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696235584] [2021-07-13 19:15:53,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:15:53,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:53,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:15:53,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:53,305 INFO L87 Difference]: Start difference. First operand 10752 states and 28038 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:53,557 INFO L93 Difference]: Finished difference Result 12521 states and 31155 transitions. [2021-07-13 19:15:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:15:53,557 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:53,574 INFO L225 Difference]: With dead ends: 12521 [2021-07-13 19:15:53,574 INFO L226 Difference]: Without dead ends: 12488 [2021-07-13 19:15:53,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12488 states. [2021-07-13 19:15:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12488 to 10400. [2021-07-13 19:15:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10400 states, 10399 states have (on average 2.5997692085777477) internal successors, (27035), 10399 states have internal predecessors, (27035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10400 states to 10400 states and 27035 transitions. [2021-07-13 19:15:53,746 INFO L78 Accepts]: Start accepts. Automaton has 10400 states and 27035 transitions. Word has length 53 [2021-07-13 19:15:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:53,746 INFO L482 AbstractCegarLoop]: Abstraction has 10400 states and 27035 transitions. [2021-07-13 19:15:53,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 10400 states and 27035 transitions. [2021-07-13 19:15:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:53,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:53,757 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:53,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:53,957 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:53,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1345698456, now seen corresponding path program 182 times [2021-07-13 19:15:53,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:53,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008237451] [2021-07-13 19:15:53,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:54,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008237451] [2021-07-13 19:15:54,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008237451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:54,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29734244] [2021-07-13 19:15:54,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:54,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:54,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:54,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:54,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:54,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29734244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:54,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:54,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:15:54,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591279784] [2021-07-13 19:15:54,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:54,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:54,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:54,152 INFO L87 Difference]: Start difference. First operand 10400 states and 27035 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:54,742 INFO L93 Difference]: Finished difference Result 14179 states and 34868 transitions. [2021-07-13 19:15:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:15:54,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:54,765 INFO L225 Difference]: With dead ends: 14179 [2021-07-13 19:15:54,765 INFO L226 Difference]: Without dead ends: 14023 [2021-07-13 19:15:54,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:15:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14023 states. [2021-07-13 19:15:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14023 to 10040. [2021-07-13 19:15:54,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10040 states, 10039 states have (on average 2.592887737822492) internal successors, (26030), 10039 states have internal predecessors, (26030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10040 states to 10040 states and 26030 transitions. [2021-07-13 19:15:54,949 INFO L78 Accepts]: Start accepts. Automaton has 10040 states and 26030 transitions. Word has length 53 [2021-07-13 19:15:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,949 INFO L482 AbstractCegarLoop]: Abstraction has 10040 states and 26030 transitions. [2021-07-13 19:15:54,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10040 states and 26030 transitions. [2021-07-13 19:15:54,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:54,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,959 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:55,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-07-13 19:15:55,159 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1583759973, now seen corresponding path program 86 times [2021-07-13 19:15:55,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:55,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182786271] [2021-07-13 19:15:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:55,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:55,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182786271] [2021-07-13 19:15:55,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182786271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:55,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804462368] [2021-07-13 19:15:55,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:55,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:55,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:55,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:55,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:55,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804462368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:55,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:55,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:15:55,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501915075] [2021-07-13 19:15:55,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:15:55,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:55,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:15:55,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:55,312 INFO L87 Difference]: Start difference. First operand 10040 states and 26030 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:55,521 INFO L93 Difference]: Finished difference Result 12926 states and 32056 transitions. [2021-07-13 19:15:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:15:55,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:55,541 INFO L225 Difference]: With dead ends: 12926 [2021-07-13 19:15:55,541 INFO L226 Difference]: Without dead ends: 12912 [2021-07-13 19:15:55,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:55,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12912 states. [2021-07-13 19:15:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12912 to 10415. [2021-07-13 19:15:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10415 states, 10414 states have (on average 2.6024582293067025) internal successors, (27102), 10414 states have internal predecessors, (27102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 27102 transitions. [2021-07-13 19:15:55,713 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 27102 transitions. Word has length 53 [2021-07-13 19:15:55,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:55,714 INFO L482 AbstractCegarLoop]: Abstraction has 10415 states and 27102 transitions. [2021-07-13 19:15:55,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,714 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 27102 transitions. [2021-07-13 19:15:55,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:55,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:55,724 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:55,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-07-13 19:15:55,925 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2089326913, now seen corresponding path program 87 times [2021-07-13 19:15:55,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:55,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486085868] [2021-07-13 19:15:55,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:15:56,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:56,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486085868] [2021-07-13 19:15:56,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486085868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:56,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430475843] [2021-07-13 19:15:56,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:56,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 19:15:56,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:56,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:15:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 109 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:56,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430475843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:56,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:56,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-07-13 19:15:56,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054322576] [2021-07-13 19:15:56,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:15:56,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:56,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:15:56,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:56,143 INFO L87 Difference]: Start difference. First operand 10415 states and 27102 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:56,437 INFO L93 Difference]: Finished difference Result 13428 states and 33227 transitions. [2021-07-13 19:15:56,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:56,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:56,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:56,462 INFO L225 Difference]: With dead ends: 13428 [2021-07-13 19:15:56,462 INFO L226 Difference]: Without dead ends: 13428 [2021-07-13 19:15:56,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13428 states. [2021-07-13 19:15:56,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13428 to 10022. [2021-07-13 19:15:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 2.595150184612314) internal successors, (26006), 10021 states have internal predecessors, (26006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 26006 transitions. [2021-07-13 19:15:56,646 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 26006 transitions. Word has length 53 [2021-07-13 19:15:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:56,646 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 26006 transitions. [2021-07-13 19:15:56,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 26006 transitions. [2021-07-13 19:15:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:56,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:56,657 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:56,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-07-13 19:15:56,857 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:56,858 INFO L82 PathProgramCache]: Analyzing trace with hash 547874413, now seen corresponding path program 183 times [2021-07-13 19:15:56,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:56,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434683633] [2021-07-13 19:15:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:56,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:56,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434683633] [2021-07-13 19:15:56,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434683633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:56,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892530328] [2021-07-13 19:15:56,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:56,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:15:56,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:56,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:57,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892530328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:57,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:57,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:15:57,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193598145] [2021-07-13 19:15:57,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:57,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:57,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:57,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:57,039 INFO L87 Difference]: Start difference. First operand 10022 states and 26006 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:57,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:57,240 INFO L93 Difference]: Finished difference Result 11503 states and 28619 transitions. [2021-07-13 19:15:57,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:15:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:57,258 INFO L225 Difference]: With dead ends: 11503 [2021-07-13 19:15:57,258 INFO L226 Difference]: Without dead ends: 11467 [2021-07-13 19:15:57,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:57,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-07-13 19:15:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10022. [2021-07-13 19:15:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 2.5942520706516317) internal successors, (25997), 10021 states have internal predecessors, (25997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 25997 transitions. [2021-07-13 19:15:57,419 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 25997 transitions. Word has length 53 [2021-07-13 19:15:57,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:57,419 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 25997 transitions. [2021-07-13 19:15:57,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 25997 transitions. [2021-07-13 19:15:57,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:57,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:57,429 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:57,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:57,630 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:57,630 INFO L82 PathProgramCache]: Analyzing trace with hash 355684522, now seen corresponding path program 88 times [2021-07-13 19:15:57,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:57,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524232147] [2021-07-13 19:15:57,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:57,710 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:57,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:57,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524232147] [2021-07-13 19:15:57,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524232147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:57,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953285961] [2021-07-13 19:15:57,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:57,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:57,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:57,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:15:57,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:15:57,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953285961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:57,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:57,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:15:57,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495559093] [2021-07-13 19:15:57,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:15:57,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:57,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:15:57,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:57,812 INFO L87 Difference]: Start difference. First operand 10022 states and 25997 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:58,256 INFO L93 Difference]: Finished difference Result 11456 states and 28845 transitions. [2021-07-13 19:15:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:58,257 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:58,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:58,274 INFO L225 Difference]: With dead ends: 11456 [2021-07-13 19:15:58,274 INFO L226 Difference]: Without dead ends: 11434 [2021-07-13 19:15:58,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11434 states. [2021-07-13 19:15:58,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11434 to 10210. [2021-07-13 19:15:58,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10209 states have (on average 2.591928690371241) internal successors, (26461), 10209 states have internal predecessors, (26461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 26461 transitions. [2021-07-13 19:15:58,462 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 26461 transitions. Word has length 53 [2021-07-13 19:15:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:58,462 INFO L482 AbstractCegarLoop]: Abstraction has 10210 states and 26461 transitions. [2021-07-13 19:15:58,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 26461 transitions. [2021-07-13 19:15:58,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:58,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:58,472 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:58,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-07-13 19:15:58,673 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1198012335, now seen corresponding path program 184 times [2021-07-13 19:15:58,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:58,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239611075] [2021-07-13 19:15:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:58,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:58,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239611075] [2021-07-13 19:15:58,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239611075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:58,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9885661] [2021-07-13 19:15:58,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:58,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:58,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:58,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:58,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:58,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9885661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:58,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:58,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:15:58,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260350719] [2021-07-13 19:15:58,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:15:58,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:15:58,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:15:58,819 INFO L87 Difference]: Start difference. First operand 10210 states and 26461 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:58,956 INFO L93 Difference]: Finished difference Result 11989 states and 29653 transitions. [2021-07-13 19:15:58,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:58,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:58,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:58,975 INFO L225 Difference]: With dead ends: 11989 [2021-07-13 19:15:58,975 INFO L226 Difference]: Without dead ends: 11986 [2021-07-13 19:15:58,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-07-13 19:15:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 10202. [2021-07-13 19:15:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 2.5904323105577887) internal successors, (26425), 10201 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26425 transitions. [2021-07-13 19:15:59,144 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26425 transitions. Word has length 53 [2021-07-13 19:15:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:59,144 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26425 transitions. [2021-07-13 19:15:59,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:59,144 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26425 transitions. [2021-07-13 19:15:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:59,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:59,154 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:59,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:59,355 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:59,355 INFO L82 PathProgramCache]: Analyzing trace with hash -990949769, now seen corresponding path program 185 times [2021-07-13 19:15:59,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:59,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70465311] [2021-07-13 19:15:59,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:15:59,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:59,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70465311] [2021-07-13 19:15:59,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70465311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:59,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794822594] [2021-07-13 19:15:59,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:59,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:15:59,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:59,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:15:59,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:59,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794822594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:59,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:59,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-07-13 19:15:59,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030354050] [2021-07-13 19:15:59,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:15:59,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:59,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:15:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:59,538 INFO L87 Difference]: Start difference. First operand 10202 states and 26425 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:59,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:59,761 INFO L93 Difference]: Finished difference Result 12152 states and 29947 transitions. [2021-07-13 19:15:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:15:59,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:15:59,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:59,780 INFO L225 Difference]: With dead ends: 12152 [2021-07-13 19:15:59,780 INFO L226 Difference]: Without dead ends: 12134 [2021-07-13 19:15:59,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:15:59,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2021-07-13 19:15:59,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 10202. [2021-07-13 19:15:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 2.5880796000392117) internal successors, (26401), 10201 states have internal predecessors, (26401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26401 transitions. [2021-07-13 19:15:59,945 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26401 transitions. Word has length 53 [2021-07-13 19:15:59,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:59,945 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26401 transitions. [2021-07-13 19:15:59,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26401 transitions. [2021-07-13 19:15:59,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:15:59,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:59,955 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:00,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-07-13 19:16:00,156 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:00,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1856017514, now seen corresponding path program 186 times [2021-07-13 19:16:00,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:00,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295174148] [2021-07-13 19:16:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:00,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:00,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295174148] [2021-07-13 19:16:00,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295174148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:00,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076851753] [2021-07-13 19:16:00,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:00,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-13 19:16:00,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:00,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076851753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:00,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:00,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:16:00,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529292413] [2021-07-13 19:16:00,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:00,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:00,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:00,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:00,364 INFO L87 Difference]: Start difference. First operand 10202 states and 26401 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:00,899 INFO L93 Difference]: Finished difference Result 11006 states and 27812 transitions. [2021-07-13 19:16:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:00,916 INFO L225 Difference]: With dead ends: 11006 [2021-07-13 19:16:00,916 INFO L226 Difference]: Without dead ends: 10914 [2021-07-13 19:16:00,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states. [2021-07-13 19:16:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10914 to 10195. [2021-07-13 19:16:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10195 states, 10194 states have (on average 2.581518540317834) internal successors, (26316), 10194 states have internal predecessors, (26316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10195 states to 10195 states and 26316 transitions. [2021-07-13 19:16:01,085 INFO L78 Accepts]: Start accepts. Automaton has 10195 states and 26316 transitions. Word has length 53 [2021-07-13 19:16:01,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:01,085 INFO L482 AbstractCegarLoop]: Abstraction has 10195 states and 26316 transitions. [2021-07-13 19:16:01,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10195 states and 26316 transitions. [2021-07-13 19:16:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:01,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:01,095 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:01,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:01,296 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1242481334, now seen corresponding path program 187 times [2021-07-13 19:16:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:01,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296688733] [2021-07-13 19:16:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:01,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296688733] [2021-07-13 19:16:01,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296688733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948111776] [2021-07-13 19:16:01,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:01,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:01,482 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:01,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948111776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:01,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:01,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:01,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503086702] [2021-07-13 19:16:01,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:01,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:01,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:01,483 INFO L87 Difference]: Start difference. First operand 10195 states and 26316 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:01,891 INFO L93 Difference]: Finished difference Result 11506 states and 28913 transitions. [2021-07-13 19:16:01,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:01,910 INFO L225 Difference]: With dead ends: 11506 [2021-07-13 19:16:01,910 INFO L226 Difference]: Without dead ends: 11494 [2021-07-13 19:16:01,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2021-07-13 19:16:02,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 10289. [2021-07-13 19:16:02,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10289 states, 10288 states have (on average 2.5804821150855366) internal successors, (26548), 10288 states have internal predecessors, (26548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10289 states to 10289 states and 26548 transitions. [2021-07-13 19:16:02,077 INFO L78 Accepts]: Start accepts. Automaton has 10289 states and 26548 transitions. Word has length 53 [2021-07-13 19:16:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:02,077 INFO L482 AbstractCegarLoop]: Abstraction has 10289 states and 26548 transitions. [2021-07-13 19:16:02,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10289 states and 26548 transitions. [2021-07-13 19:16:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:02,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:02,088 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:02,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-07-13 19:16:02,288 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:02,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1085181847, now seen corresponding path program 89 times [2021-07-13 19:16:02,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:02,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412364678] [2021-07-13 19:16:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:02,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:02,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412364678] [2021-07-13 19:16:02,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412364678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028406910] [2021-07-13 19:16:02,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:02,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:16:02,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:02,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:02,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:02,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028406910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:02,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:02,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-07-13 19:16:02,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129288773] [2021-07-13 19:16:02,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:02,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:02,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:02,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:02,472 INFO L87 Difference]: Start difference. First operand 10289 states and 26548 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:02,685 INFO L93 Difference]: Finished difference Result 12783 states and 31677 transitions. [2021-07-13 19:16:02,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:02,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:02,705 INFO L225 Difference]: With dead ends: 12783 [2021-07-13 19:16:02,705 INFO L226 Difference]: Without dead ends: 12763 [2021-07-13 19:16:02,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-07-13 19:16:02,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 10650. [2021-07-13 19:16:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10650 states, 10649 states have (on average 2.5842802141046106) internal successors, (27520), 10649 states have internal predecessors, (27520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 27520 transitions. [2021-07-13 19:16:02,876 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 27520 transitions. Word has length 53 [2021-07-13 19:16:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:02,877 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 27520 transitions. [2021-07-13 19:16:02,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 27520 transitions. [2021-07-13 19:16:02,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:02,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:02,887 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:03,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-07-13 19:16:03,087 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:03,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:03,088 INFO L82 PathProgramCache]: Analyzing trace with hash -910568628, now seen corresponding path program 188 times [2021-07-13 19:16:03,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:03,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391193186] [2021-07-13 19:16:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:03,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:03,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391193186] [2021-07-13 19:16:03,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391193186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:03,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564944784] [2021-07-13 19:16:03,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:03,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:03,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:03,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:03,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:03,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564944784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:03,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:03,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:16:03,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023750030] [2021-07-13 19:16:03,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:03,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:03,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:03,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:03,276 INFO L87 Difference]: Start difference. First operand 10650 states and 27520 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:03,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:03,934 INFO L93 Difference]: Finished difference Result 13521 states and 33551 transitions. [2021-07-13 19:16:03,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:16:03,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:03,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:03,959 INFO L225 Difference]: With dead ends: 13521 [2021-07-13 19:16:03,960 INFO L226 Difference]: Without dead ends: 13467 [2021-07-13 19:16:03,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:16:03,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-07-13 19:16:04,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 10945. [2021-07-13 19:16:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 10944 states have (on average 2.5868055555555554) internal successors, (28310), 10944 states have internal predecessors, (28310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28310 transitions. [2021-07-13 19:16:04,150 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28310 transitions. Word has length 53 [2021-07-13 19:16:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:04,150 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28310 transitions. [2021-07-13 19:16:04,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28310 transitions. [2021-07-13 19:16:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:04,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:04,160 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:04,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:04,361 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:04,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:04,361 INFO L82 PathProgramCache]: Analyzing trace with hash 621990481, now seen corresponding path program 189 times [2021-07-13 19:16:04,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:04,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062190989] [2021-07-13 19:16:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:04,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062190989] [2021-07-13 19:16:04,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062190989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:04,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137334774] [2021-07-13 19:16:04,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:04,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:16:04,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:04,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:04,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137334774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:04,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:04,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:16:04,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208333690] [2021-07-13 19:16:04,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:04,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:04,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:04,528 INFO L87 Difference]: Start difference. First operand 10945 states and 28310 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:04,725 INFO L93 Difference]: Finished difference Result 12806 states and 31626 transitions. [2021-07-13 19:16:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:04,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:04,745 INFO L225 Difference]: With dead ends: 12806 [2021-07-13 19:16:04,745 INFO L226 Difference]: Without dead ends: 12782 [2021-07-13 19:16:04,746 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12782 states. [2021-07-13 19:16:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12782 to 10945. [2021-07-13 19:16:04,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 10944 states have (on average 2.5852521929824563) internal successors, (28293), 10944 states have internal predecessors, (28293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28293 transitions. [2021-07-13 19:16:04,927 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28293 transitions. Word has length 53 [2021-07-13 19:16:04,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:04,927 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28293 transitions. [2021-07-13 19:16:04,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:04,927 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28293 transitions. [2021-07-13 19:16:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:04,937 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:04,937 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:05,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-07-13 19:16:05,138 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:05,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:05,138 INFO L82 PathProgramCache]: Analyzing trace with hash -755732094, now seen corresponding path program 190 times [2021-07-13 19:16:05,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:05,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854332523] [2021-07-13 19:16:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:05,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:05,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854332523] [2021-07-13 19:16:05,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854332523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083797865] [2021-07-13 19:16:05,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:05,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:05,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:05,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:05,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:05,333 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:05,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083797865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:05,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:05,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:16:05,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733489382] [2021-07-13 19:16:05,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:05,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:05,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:05,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:05,334 INFO L87 Difference]: Start difference. First operand 10945 states and 28293 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:06,196 INFO L93 Difference]: Finished difference Result 17261 states and 41917 transitions. [2021-07-13 19:16:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:16:06,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:06,221 INFO L225 Difference]: With dead ends: 17261 [2021-07-13 19:16:06,221 INFO L226 Difference]: Without dead ends: 17081 [2021-07-13 19:16:06,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:16:06,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17081 states. [2021-07-13 19:16:06,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17081 to 11484. [2021-07-13 19:16:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 2.586432117042585) internal successors, (29700), 11483 states have internal predecessors, (29700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29700 transitions. [2021-07-13 19:16:06,442 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29700 transitions. Word has length 53 [2021-07-13 19:16:06,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:06,443 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29700 transitions. [2021-07-13 19:16:06,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29700 transitions. [2021-07-13 19:16:06,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:06,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:06,453 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:06,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:06,653 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:06,654 INFO L82 PathProgramCache]: Analyzing trace with hash -369129417, now seen corresponding path program 191 times [2021-07-13 19:16:06,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:06,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710622879] [2021-07-13 19:16:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:06,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:06,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710622879] [2021-07-13 19:16:06,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710622879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489786393] [2021-07-13 19:16:06,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:06,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:16:06,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:06,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:06,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:06,867 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:06,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489786393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:06,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:06,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-07-13 19:16:06,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537402056] [2021-07-13 19:16:06,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:06,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:06,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:06,868 INFO L87 Difference]: Start difference. First operand 11484 states and 29700 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:07,166 INFO L93 Difference]: Finished difference Result 13565 states and 33450 transitions. [2021-07-13 19:16:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:07,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:07,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:07,190 INFO L225 Difference]: With dead ends: 13565 [2021-07-13 19:16:07,190 INFO L226 Difference]: Without dead ends: 13532 [2021-07-13 19:16:07,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2021-07-13 19:16:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 11484. [2021-07-13 19:16:07,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 2.58564834973439) internal successors, (29691), 11483 states have internal predecessors, (29691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29691 transitions. [2021-07-13 19:16:07,394 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29691 transitions. Word has length 53 [2021-07-13 19:16:07,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:07,394 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29691 transitions. [2021-07-13 19:16:07,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:07,394 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29691 transitions. [2021-07-13 19:16:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:07,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:07,406 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:07,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:07,606 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:07,607 INFO L82 PathProgramCache]: Analyzing trace with hash -815423604, now seen corresponding path program 192 times [2021-07-13 19:16:07,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:07,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375791954] [2021-07-13 19:16:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:07,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:07,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375791954] [2021-07-13 19:16:07,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375791954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:07,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260746816] [2021-07-13 19:16:07,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:07,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-13 19:16:07,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:07,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:07,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:07,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260746816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:07,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:07,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:16:07,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044806568] [2021-07-13 19:16:07,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:07,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:07,807 INFO L87 Difference]: Start difference. First operand 11484 states and 29691 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:09,057 INFO L93 Difference]: Finished difference Result 21447 states and 51505 transitions. [2021-07-13 19:16:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-13 19:16:09,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:09,089 INFO L225 Difference]: With dead ends: 21447 [2021-07-13 19:16:09,089 INFO L226 Difference]: Without dead ends: 21171 [2021-07-13 19:16:09,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-07-13 19:16:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21171 states. [2021-07-13 19:16:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21171 to 11987. [2021-07-13 19:16:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11987 states, 11986 states have (on average 2.5869347572167527) internal successors, (31007), 11986 states have internal predecessors, (31007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11987 states to 11987 states and 31007 transitions. [2021-07-13 19:16:09,327 INFO L78 Accepts]: Start accepts. Automaton has 11987 states and 31007 transitions. Word has length 53 [2021-07-13 19:16:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:09,327 INFO L482 AbstractCegarLoop]: Abstraction has 11987 states and 31007 transitions. [2021-07-13 19:16:09,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 11987 states and 31007 transitions. [2021-07-13 19:16:09,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:09,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:09,337 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:09,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:09,537 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:09,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:09,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1078149265, now seen corresponding path program 193 times [2021-07-13 19:16:09,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:09,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674036969] [2021-07-13 19:16:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:09,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:09,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674036969] [2021-07-13 19:16:09,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674036969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105652743] [2021-07-13 19:16:09,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:09,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:09,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105652743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:09,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:16:09,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36294495] [2021-07-13 19:16:09,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:09,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:09,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:09,718 INFO L87 Difference]: Start difference. First operand 11987 states and 31007 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:09,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:09,956 INFO L93 Difference]: Finished difference Result 14020 states and 34646 transitions. [2021-07-13 19:16:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:09,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:09,980 INFO L225 Difference]: With dead ends: 14020 [2021-07-13 19:16:09,980 INFO L226 Difference]: Without dead ends: 13978 [2021-07-13 19:16:09,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13978 states. [2021-07-13 19:16:10,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13978 to 11653. [2021-07-13 19:16:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11653 states, 11652 states have (on average 2.5810161345691727) internal successors, (30074), 11652 states have internal predecessors, (30074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11653 states to 11653 states and 30074 transitions. [2021-07-13 19:16:10,190 INFO L78 Accepts]: Start accepts. Automaton has 11653 states and 30074 transitions. Word has length 53 [2021-07-13 19:16:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:10,190 INFO L482 AbstractCegarLoop]: Abstraction has 11653 states and 30074 transitions. [2021-07-13 19:16:10,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:10,191 INFO L276 IsEmpty]: Start isEmpty. Operand 11653 states and 30074 transitions. [2021-07-13 19:16:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:10,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:10,202 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:10,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-07-13 19:16:10,402 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash -968737470, now seen corresponding path program 194 times [2021-07-13 19:16:10,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:10,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896044390] [2021-07-13 19:16:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:10,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:10,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:10,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896044390] [2021-07-13 19:16:10,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896044390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:10,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272605496] [2021-07-13 19:16:10,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:10,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:10,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:10,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:10,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:10,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272605496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:10,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:10,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:16:10,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087528523] [2021-07-13 19:16:10,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:10,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:10,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:10,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:10,606 INFO L87 Difference]: Start difference. First operand 11653 states and 30074 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:11,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:11,298 INFO L93 Difference]: Finished difference Result 16353 states and 39527 transitions. [2021-07-13 19:16:11,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:16:11,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:11,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:11,322 INFO L225 Difference]: With dead ends: 16353 [2021-07-13 19:16:11,322 INFO L226 Difference]: Without dead ends: 15975 [2021-07-13 19:16:11,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:16:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15975 states. [2021-07-13 19:16:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15975 to 10369. [2021-07-13 19:16:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10369 states, 10368 states have (on average 2.568672839506173) internal successors, (26632), 10368 states have internal predecessors, (26632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:11,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 26632 transitions. [2021-07-13 19:16:11,501 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 26632 transitions. Word has length 53 [2021-07-13 19:16:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:11,501 INFO L482 AbstractCegarLoop]: Abstraction has 10369 states and 26632 transitions. [2021-07-13 19:16:11,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 26632 transitions. [2021-07-13 19:16:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:11,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:11,511 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:11,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:11,711 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1828679397, now seen corresponding path program 90 times [2021-07-13 19:16:11,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:11,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873747848] [2021-07-13 19:16:11,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:11,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873747848] [2021-07-13 19:16:11,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873747848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:11,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302556253] [2021-07-13 19:16:11,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:11,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-13 19:16:11,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:11,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:11,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302556253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:11,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:11,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:16:11,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673896782] [2021-07-13 19:16:11,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:11,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:11,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:11,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:11,877 INFO L87 Difference]: Start difference. First operand 10369 states and 26632 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:12,119 INFO L93 Difference]: Finished difference Result 15824 states and 38717 transitions. [2021-07-13 19:16:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:12,120 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:12,145 INFO L225 Difference]: With dead ends: 15824 [2021-07-13 19:16:12,145 INFO L226 Difference]: Without dead ends: 15824 [2021-07-13 19:16:12,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2021-07-13 19:16:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 10590. [2021-07-13 19:16:12,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10590 states, 10589 states have (on average 2.578808197185759) internal successors, (27307), 10589 states have internal predecessors, (27307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10590 states to 10590 states and 27307 transitions. [2021-07-13 19:16:12,340 INFO L78 Accepts]: Start accepts. Automaton has 10590 states and 27307 transitions. Word has length 53 [2021-07-13 19:16:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:12,340 INFO L482 AbstractCegarLoop]: Abstraction has 10590 states and 27307 transitions. [2021-07-13 19:16:12,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 10590 states and 27307 transitions. [2021-07-13 19:16:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:12,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:12,351 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:12,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-07-13 19:16:12,552 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:12,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:12,552 INFO L82 PathProgramCache]: Analyzing trace with hash 828715443, now seen corresponding path program 91 times [2021-07-13 19:16:12,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:12,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927791235] [2021-07-13 19:16:12,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:12,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:12,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927791235] [2021-07-13 19:16:12,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927791235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:12,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559255738] [2021-07-13 19:16:12,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:12,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:12,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559255738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:12,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:12,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:16:12,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403351433] [2021-07-13 19:16:12,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:12,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:12,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:12,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:12,723 INFO L87 Difference]: Start difference. First operand 10590 states and 27307 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:13,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:13,048 INFO L93 Difference]: Finished difference Result 17337 states and 42262 transitions. [2021-07-13 19:16:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:16:13,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:13,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:13,079 INFO L225 Difference]: With dead ends: 17337 [2021-07-13 19:16:13,080 INFO L226 Difference]: Without dead ends: 17337 [2021-07-13 19:16:13,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:16:13,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17337 states. [2021-07-13 19:16:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17337 to 10630. [2021-07-13 19:16:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10630 states, 10629 states have (on average 2.5802991814846177) internal successors, (27426), 10629 states have internal predecessors, (27426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10630 states to 10630 states and 27426 transitions. [2021-07-13 19:16:13,306 INFO L78 Accepts]: Start accepts. Automaton has 10630 states and 27426 transitions. Word has length 53 [2021-07-13 19:16:13,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:13,306 INFO L482 AbstractCegarLoop]: Abstraction has 10630 states and 27426 transitions. [2021-07-13 19:16:13,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 10630 states and 27426 transitions. [2021-07-13 19:16:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:13,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:13,317 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:13,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:13,517 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:13,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:13,517 INFO L82 PathProgramCache]: Analyzing trace with hash -861279721, now seen corresponding path program 92 times [2021-07-13 19:16:13,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:13,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506617532] [2021-07-13 19:16:13,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:13,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:13,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506617532] [2021-07-13 19:16:13,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506617532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:13,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033444875] [2021-07-13 19:16:13,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:13,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:13,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:13,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:13,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033444875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:13,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:13,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:16:13,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224602301] [2021-07-13 19:16:13,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:13,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:13,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:13,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:13,749 INFO L87 Difference]: Start difference. First operand 10630 states and 27426 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:14,116 INFO L93 Difference]: Finished difference Result 17209 states and 41987 transitions. [2021-07-13 19:16:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:16:14,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:14,149 INFO L225 Difference]: With dead ends: 17209 [2021-07-13 19:16:14,149 INFO L226 Difference]: Without dead ends: 17209 [2021-07-13 19:16:14,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:16:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17209 states. [2021-07-13 19:16:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17209 to 10659. [2021-07-13 19:16:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10659 states, 10658 states have (on average 2.581534997185213) internal successors, (27514), 10658 states have internal predecessors, (27514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 27514 transitions. [2021-07-13 19:16:14,370 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 27514 transitions. Word has length 53 [2021-07-13 19:16:14,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:14,370 INFO L482 AbstractCegarLoop]: Abstraction has 10659 states and 27514 transitions. [2021-07-13 19:16:14,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 27514 transitions. [2021-07-13 19:16:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:14,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:14,380 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:14,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-07-13 19:16:14,581 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:14,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1900566733, now seen corresponding path program 93 times [2021-07-13 19:16:14,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:14,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389793223] [2021-07-13 19:16:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:14,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:14,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389793223] [2021-07-13 19:16:14,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389793223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:14,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937411315] [2021-07-13 19:16:14,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:14,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 19:16:14,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:14,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:16:14,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 112 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:14,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937411315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:14,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:14,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-07-13 19:16:14,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972732319] [2021-07-13 19:16:14,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:16:14,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:14,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:16:14,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:14,823 INFO L87 Difference]: Start difference. First operand 10659 states and 27514 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:15,139 INFO L93 Difference]: Finished difference Result 12656 states and 31353 transitions. [2021-07-13 19:16:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:15,161 INFO L225 Difference]: With dead ends: 12656 [2021-07-13 19:16:15,161 INFO L226 Difference]: Without dead ends: 12656 [2021-07-13 19:16:15,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:16:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12656 states. [2021-07-13 19:16:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12656 to 10205. [2021-07-13 19:16:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 2.5751666013328105) internal successors, (26277), 10204 states have internal predecessors, (26277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:15,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26277 transitions. [2021-07-13 19:16:15,343 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26277 transitions. Word has length 53 [2021-07-13 19:16:15,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:15,343 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26277 transitions. [2021-07-13 19:16:15,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:15,344 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26277 transitions. [2021-07-13 19:16:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:15,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:15,354 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:15,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-07-13 19:16:15,555 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash -219319817, now seen corresponding path program 195 times [2021-07-13 19:16:15,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:15,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935137105] [2021-07-13 19:16:15,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:15,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:15,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935137105] [2021-07-13 19:16:15,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935137105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:15,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361267302] [2021-07-13 19:16:15,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:15,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:16:15,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:15,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:15,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361267302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:15,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:15,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:16:15,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237424432] [2021-07-13 19:16:15,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:15,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:15,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:15,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:15,751 INFO L87 Difference]: Start difference. First operand 10205 states and 26277 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:16,017 INFO L93 Difference]: Finished difference Result 11763 states and 29051 transitions. [2021-07-13 19:16:16,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:16,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:16,070 INFO L225 Difference]: With dead ends: 11763 [2021-07-13 19:16:16,071 INFO L226 Difference]: Without dead ends: 11718 [2021-07-13 19:16:16,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:16:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11718 states. [2021-07-13 19:16:16,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11718 to 10205. [2021-07-13 19:16:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 2.574284594276754) internal successors, (26268), 10204 states have internal predecessors, (26268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26268 transitions. [2021-07-13 19:16:16,215 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26268 transitions. Word has length 53 [2021-07-13 19:16:16,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:16,215 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26268 transitions. [2021-07-13 19:16:16,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,215 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26268 transitions. [2021-07-13 19:16:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:16,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:16,224 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:16,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:16,425 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:16,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1122147283, now seen corresponding path program 196 times [2021-07-13 19:16:16,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:16,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945695476] [2021-07-13 19:16:16,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:16,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:16,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945695476] [2021-07-13 19:16:16,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945695476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000925621] [2021-07-13 19:16:16,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:16,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:16,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:16,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:16,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:16,579 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:16,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000925621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:16,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:16,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:16:16,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718103785] [2021-07-13 19:16:16,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:16:16,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:16,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:16:16,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:16:16,580 INFO L87 Difference]: Start difference. First operand 10205 states and 26268 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:16,731 INFO L93 Difference]: Finished difference Result 12506 states and 30816 transitions. [2021-07-13 19:16:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:16:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:16,750 INFO L225 Difference]: With dead ends: 12506 [2021-07-13 19:16:16,750 INFO L226 Difference]: Without dead ends: 12506 [2021-07-13 19:16:16,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-07-13 19:16:16,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 10409. [2021-07-13 19:16:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10409 states, 10408 states have (on average 2.5858954650269026) internal successors, (26914), 10408 states have internal predecessors, (26914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10409 states to 10409 states and 26914 transitions. [2021-07-13 19:16:16,914 INFO L78 Accepts]: Start accepts. Automaton has 10409 states and 26914 transitions. Word has length 53 [2021-07-13 19:16:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:16,915 INFO L482 AbstractCegarLoop]: Abstraction has 10409 states and 26914 transitions. [2021-07-13 19:16:16,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:16,915 INFO L276 IsEmpty]: Start isEmpty. Operand 10409 states and 26914 transitions. [2021-07-13 19:16:16,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:16,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:16,925 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:17,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-07-13 19:16:17,125 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:17,125 INFO L82 PathProgramCache]: Analyzing trace with hash 884085766, now seen corresponding path program 94 times [2021-07-13 19:16:17,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:17,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398471540] [2021-07-13 19:16:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:17,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:17,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398471540] [2021-07-13 19:16:17,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398471540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:17,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649707327] [2021-07-13 19:16:17,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:17,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:17,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:17,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:17,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:17,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649707327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:17,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:17,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:17,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075122791] [2021-07-13 19:16:17,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:17,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:17,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:17,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:17,310 INFO L87 Difference]: Start difference. First operand 10409 states and 26914 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:17,731 INFO L93 Difference]: Finished difference Result 11786 states and 29613 transitions. [2021-07-13 19:16:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:17,750 INFO L225 Difference]: With dead ends: 11786 [2021-07-13 19:16:17,750 INFO L226 Difference]: Without dead ends: 11771 [2021-07-13 19:16:17,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11771 states. [2021-07-13 19:16:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11771 to 10612. [2021-07-13 19:16:17,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10612 states, 10611 states have (on average 2.5817547827725944) internal successors, (27395), 10611 states have internal predecessors, (27395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:17,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 27395 transitions. [2021-07-13 19:16:17,924 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 27395 transitions. Word has length 53 [2021-07-13 19:16:17,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:17,925 INFO L482 AbstractCegarLoop]: Abstraction has 10612 states and 27395 transitions. [2021-07-13 19:16:17,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 27395 transitions. [2021-07-13 19:16:17,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:17,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:17,935 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:18,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-07-13 19:16:18,136 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:18,136 INFO L82 PathProgramCache]: Analyzing trace with hash -669611091, now seen corresponding path program 197 times [2021-07-13 19:16:18,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:18,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119115911] [2021-07-13 19:16:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:16:18,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:18,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119115911] [2021-07-13 19:16:18,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119115911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:18,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863636652] [2021-07-13 19:16:18,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:18,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 19:16:18,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:18,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:18,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:18,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863636652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:18,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:18,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 12 [2021-07-13 19:16:18,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840078674] [2021-07-13 19:16:18,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:18,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:18,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:18,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:18,321 INFO L87 Difference]: Start difference. First operand 10612 states and 27395 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:18,563 INFO L93 Difference]: Finished difference Result 12612 states and 31047 transitions. [2021-07-13 19:16:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:18,582 INFO L225 Difference]: With dead ends: 12612 [2021-07-13 19:16:18,582 INFO L226 Difference]: Without dead ends: 12609 [2021-07-13 19:16:18,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12609 states. [2021-07-13 19:16:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12609 to 10610. [2021-07-13 19:16:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 2.5811103779809597) internal successors, (27383), 10609 states have internal predecessors, (27383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27383 transitions. [2021-07-13 19:16:18,759 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27383 transitions. Word has length 53 [2021-07-13 19:16:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:18,759 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27383 transitions. [2021-07-13 19:16:18,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27383 transitions. [2021-07-13 19:16:18,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:18,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:18,770 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:18,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:18,971 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:18,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:18,971 INFO L82 PathProgramCache]: Analyzing trace with hash -462548525, now seen corresponding path program 198 times [2021-07-13 19:16:18,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:18,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208297759] [2021-07-13 19:16:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:19,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:19,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208297759] [2021-07-13 19:16:19,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208297759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026778291] [2021-07-13 19:16:19,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:19,056 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 19:16:19,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:19,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:19,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026778291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:19,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:16:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937537471] [2021-07-13 19:16:19,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:19,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:19,126 INFO L87 Difference]: Start difference. First operand 10610 states and 27383 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:19,296 INFO L93 Difference]: Finished difference Result 12493 states and 30763 transitions. [2021-07-13 19:16:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:19,318 INFO L225 Difference]: With dead ends: 12493 [2021-07-13 19:16:19,318 INFO L226 Difference]: Without dead ends: 12475 [2021-07-13 19:16:19,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12475 states. [2021-07-13 19:16:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12475 to 10610. [2021-07-13 19:16:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 2.578942407389952) internal successors, (27360), 10609 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27360 transitions. [2021-07-13 19:16:19,488 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27360 transitions. Word has length 53 [2021-07-13 19:16:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:19,488 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27360 transitions. [2021-07-13 19:16:19,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:19,489 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27360 transitions. [2021-07-13 19:16:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:19,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:19,498 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:19,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-07-13 19:16:19,699 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1910548538, now seen corresponding path program 199 times [2021-07-13 19:16:19,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:19,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269414674] [2021-07-13 19:16:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:19,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:19,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269414674] [2021-07-13 19:16:19,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269414674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32284811] [2021-07-13 19:16:19,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:19,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:19,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:19,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32284811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:19,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:19,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:16:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523956096] [2021-07-13 19:16:19,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:19,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:19,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:19,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:19,886 INFO L87 Difference]: Start difference. First operand 10610 states and 27360 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:20,473 INFO L93 Difference]: Finished difference Result 11446 states and 28816 transitions. [2021-07-13 19:16:20,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:20,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:20,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:20,493 INFO L225 Difference]: With dead ends: 11446 [2021-07-13 19:16:20,494 INFO L226 Difference]: Without dead ends: 11336 [2021-07-13 19:16:20,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:20,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2021-07-13 19:16:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 10627. [2021-07-13 19:16:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10627 states, 10626 states have (on average 2.569734613212874) internal successors, (27306), 10626 states have internal predecessors, (27306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10627 states to 10627 states and 27306 transitions. [2021-07-13 19:16:20,681 INFO L78 Accepts]: Start accepts. Automaton has 10627 states and 27306 transitions. Word has length 53 [2021-07-13 19:16:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:20,681 INFO L482 AbstractCegarLoop]: Abstraction has 10627 states and 27306 transitions. [2021-07-13 19:16:20,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 10627 states and 27306 transitions. [2021-07-13 19:16:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:20,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:20,691 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:20,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:20,892 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:20,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1770882578, now seen corresponding path program 200 times [2021-07-13 19:16:20,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:20,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411830885] [2021-07-13 19:16:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:20,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:21,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:21,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411830885] [2021-07-13 19:16:21,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411830885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683807095] [2021-07-13 19:16:21,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:21,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:21,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:21,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:21,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:21,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683807095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:21,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:21,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:21,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619738959] [2021-07-13 19:16:21,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:21,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:21,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:21,112 INFO L87 Difference]: Start difference. First operand 10627 states and 27306 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:21,529 INFO L93 Difference]: Finished difference Result 11964 states and 29958 transitions. [2021-07-13 19:16:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:21,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:21,550 INFO L225 Difference]: With dead ends: 11964 [2021-07-13 19:16:21,550 INFO L226 Difference]: Without dead ends: 11952 [2021-07-13 19:16:21,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11952 states. [2021-07-13 19:16:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11952 to 10745. [2021-07-13 19:16:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.5690618019359643) internal successors, (27602), 10744 states have internal predecessors, (27602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 27602 transitions. [2021-07-13 19:16:21,749 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 27602 transitions. Word has length 53 [2021-07-13 19:16:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:21,749 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 27602 transitions. [2021-07-13 19:16:21,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 27602 transitions. [2021-07-13 19:16:21,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:21,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:21,760 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:21,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-07-13 19:16:21,961 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:21,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:21,961 INFO L82 PathProgramCache]: Analyzing trace with hash -382167384, now seen corresponding path program 201 times [2021-07-13 19:16:21,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:21,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080864597] [2021-07-13 19:16:21,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:22,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:22,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080864597] [2021-07-13 19:16:22,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080864597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:22,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039918258] [2021-07-13 19:16:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:22,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 19:16:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:22,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:22,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039918258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:22,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:22,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:16:22,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400433371] [2021-07-13 19:16:22,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:22,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:22,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:22,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:22,157 INFO L87 Difference]: Start difference. First operand 10745 states and 27602 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:22,818 INFO L93 Difference]: Finished difference Result 13743 states and 33934 transitions. [2021-07-13 19:16:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:16:22,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:22,842 INFO L225 Difference]: With dead ends: 13743 [2021-07-13 19:16:22,842 INFO L226 Difference]: Without dead ends: 13689 [2021-07-13 19:16:22,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:16:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2021-07-13 19:16:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 11094. [2021-07-13 19:16:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.5733345352925268) internal successors, (28546), 11093 states have internal predecessors, (28546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28546 transitions. [2021-07-13 19:16:23,051 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28546 transitions. Word has length 53 [2021-07-13 19:16:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:23,051 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28546 transitions. [2021-07-13 19:16:23,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28546 transitions. [2021-07-13 19:16:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:23,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:23,061 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:23,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:23,262 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1150391725, now seen corresponding path program 202 times [2021-07-13 19:16:23,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:23,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223606722] [2021-07-13 19:16:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:23,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223606722] [2021-07-13 19:16:23,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223606722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122127503] [2021-07-13 19:16:23,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:23,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:23,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:23,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122127503] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:23,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:23,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:16:23,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023530233] [2021-07-13 19:16:23,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:23,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:23,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:23,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:23,425 INFO L87 Difference]: Start difference. First operand 11094 states and 28546 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:23,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:23,650 INFO L93 Difference]: Finished difference Result 13092 states and 32135 transitions. [2021-07-13 19:16:23,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:16:23,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:23,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:23,669 INFO L225 Difference]: With dead ends: 13092 [2021-07-13 19:16:23,669 INFO L226 Difference]: Without dead ends: 13068 [2021-07-13 19:16:23,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:23,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13068 states. [2021-07-13 19:16:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13068 to 11094. [2021-07-13 19:16:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.571802037320833) internal successors, (28529), 11093 states have internal predecessors, (28529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28529 transitions. [2021-07-13 19:16:23,836 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28529 transitions. Word has length 53 [2021-07-13 19:16:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:23,836 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28529 transitions. [2021-07-13 19:16:23,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28529 transitions. [2021-07-13 19:16:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:23,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:23,846 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:24,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:24,046 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:24,047 INFO L82 PathProgramCache]: Analyzing trace with hash -227330850, now seen corresponding path program 203 times [2021-07-13 19:16:24,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:24,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303148021] [2021-07-13 19:16:24,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:24,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:24,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303148021] [2021-07-13 19:16:24,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303148021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789670977] [2021-07-13 19:16:24,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:24,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 19:16:24,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:24,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:24,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789670977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:24,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:24,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:16:24,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360080084] [2021-07-13 19:16:24,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:24,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:24,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:24,236 INFO L87 Difference]: Start difference. First operand 11094 states and 28529 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:25,188 INFO L93 Difference]: Finished difference Result 17716 states and 42908 transitions. [2021-07-13 19:16:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-13 19:16:25,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:25,226 INFO L225 Difference]: With dead ends: 17716 [2021-07-13 19:16:25,226 INFO L226 Difference]: Without dead ends: 17548 [2021-07-13 19:16:25,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 415.8ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:16:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17548 states. [2021-07-13 19:16:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17548 to 11789. [2021-07-13 19:16:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11789 states, 11788 states have (on average 2.574737020699016) internal successors, (30351), 11788 states have internal predecessors, (30351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30351 transitions. [2021-07-13 19:16:25,466 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30351 transitions. Word has length 53 [2021-07-13 19:16:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:25,467 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30351 transitions. [2021-07-13 19:16:25,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30351 transitions. [2021-07-13 19:16:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:25,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:25,477 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:25,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:25,678 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:25,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:25,678 INFO L82 PathProgramCache]: Analyzing trace with hash 159271827, now seen corresponding path program 204 times [2021-07-13 19:16:25,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:25,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349784076] [2021-07-13 19:16:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:25,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:25,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349784076] [2021-07-13 19:16:25,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349784076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:25,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784624900] [2021-07-13 19:16:25,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:25,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:16:25,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:25,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:25,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:25,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784624900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:25,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:25,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:16:25,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877152519] [2021-07-13 19:16:25,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:25,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:25,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:25,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:25,854 INFO L87 Difference]: Start difference. First operand 11789 states and 30351 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:26,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:26,046 INFO L93 Difference]: Finished difference Result 13934 states and 34216 transitions. [2021-07-13 19:16:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:26,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:26,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:26,072 INFO L225 Difference]: With dead ends: 13934 [2021-07-13 19:16:26,072 INFO L226 Difference]: Without dead ends: 13901 [2021-07-13 19:16:26,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13901 states. [2021-07-13 19:16:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13901 to 11789. [2021-07-13 19:16:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11789 states, 11788 states have (on average 2.5739735324058364) internal successors, (30342), 11788 states have internal predecessors, (30342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30342 transitions. [2021-07-13 19:16:26,286 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30342 transitions. Word has length 53 [2021-07-13 19:16:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:26,286 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30342 transitions. [2021-07-13 19:16:26,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30342 transitions. [2021-07-13 19:16:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:26,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:26,296 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:26,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:26,500 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash -287022360, now seen corresponding path program 205 times [2021-07-13 19:16:26,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:26,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23440965] [2021-07-13 19:16:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:26,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:26,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23440965] [2021-07-13 19:16:26,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23440965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:26,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789234044] [2021-07-13 19:16:26,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:26,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:26,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:26,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:26,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789234044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:26,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:26,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:16:26,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870934288] [2021-07-13 19:16:26,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:26,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:26,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:26,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:26,690 INFO L87 Difference]: Start difference. First operand 11789 states and 30342 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:28,209 INFO L93 Difference]: Finished difference Result 26526 states and 62830 transitions. [2021-07-13 19:16:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-13 19:16:28,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:28,266 INFO L225 Difference]: With dead ends: 26526 [2021-07-13 19:16:28,266 INFO L226 Difference]: Without dead ends: 26004 [2021-07-13 19:16:28,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-07-13 19:16:28,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26004 states. [2021-07-13 19:16:28,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26004 to 12945. [2021-07-13 19:16:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12944 states have (on average 2.575324474660074) internal successors, (33335), 12944 states have internal predecessors, (33335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33335 transitions. [2021-07-13 19:16:28,658 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33335 transitions. Word has length 53 [2021-07-13 19:16:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:28,658 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33335 transitions. [2021-07-13 19:16:28,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33335 transitions. [2021-07-13 19:16:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:28,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:28,668 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:28,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:28,868 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:28,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1606550509, now seen corresponding path program 206 times [2021-07-13 19:16:28,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:28,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795090482] [2021-07-13 19:16:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:28,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:28,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795090482] [2021-07-13 19:16:28,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795090482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:28,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968264840] [2021-07-13 19:16:28,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:28,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:28,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:28,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:29,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968264840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:29,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:29,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:16:29,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982327604] [2021-07-13 19:16:29,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:29,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:29,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:29,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:29,050 INFO L87 Difference]: Start difference. First operand 12945 states and 33335 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:29,292 INFO L93 Difference]: Finished difference Result 15322 states and 37639 transitions. [2021-07-13 19:16:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:29,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:29,317 INFO L225 Difference]: With dead ends: 15322 [2021-07-13 19:16:29,317 INFO L226 Difference]: Without dead ends: 15280 [2021-07-13 19:16:29,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15280 states. [2021-07-13 19:16:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15280 to 12945. [2021-07-13 19:16:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12944 states have (on average 2.574629171817058) internal successors, (33326), 12944 states have internal predecessors, (33326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33326 transitions. [2021-07-13 19:16:29,572 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33326 transitions. Word has length 53 [2021-07-13 19:16:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:29,572 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33326 transitions. [2021-07-13 19:16:29,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:29,572 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33326 transitions. [2021-07-13 19:16:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:29,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:29,583 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:29,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:29,783 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash -440336226, now seen corresponding path program 207 times [2021-07-13 19:16:29,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:29,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904026360] [2021-07-13 19:16:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:29,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:29,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904026360] [2021-07-13 19:16:29,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904026360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:29,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643913167] [2021-07-13 19:16:29,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:29,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:16:29,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:29,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:29,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:29,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643913167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:29,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:29,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:16:29,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452752480] [2021-07-13 19:16:29,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:29,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:29,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:29,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:29,990 INFO L87 Difference]: Start difference. First operand 12945 states and 33326 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:32,271 INFO L93 Difference]: Finished difference Result 33896 states and 80215 transitions. [2021-07-13 19:16:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-07-13 19:16:32,272 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:32,337 INFO L225 Difference]: With dead ends: 33896 [2021-07-13 19:16:32,338 INFO L226 Difference]: Without dead ends: 33278 [2021-07-13 19:16:32,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6564 ImplicationChecksByTransitivity, 1524.1ms TimeCoverageRelationStatistics Valid=1461, Invalid=15051, Unknown=0, NotChecked=0, Total=16512 [2021-07-13 19:16:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33278 states. [2021-07-13 19:16:32,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33278 to 13864. [2021-07-13 19:16:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13864 states, 13863 states have (on average 2.5749116352881773) internal successors, (35696), 13863 states have internal predecessors, (35696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13864 states to 13864 states and 35696 transitions. [2021-07-13 19:16:32,743 INFO L78 Accepts]: Start accepts. Automaton has 13864 states and 35696 transitions. Word has length 53 [2021-07-13 19:16:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:32,743 INFO L482 AbstractCegarLoop]: Abstraction has 13864 states and 35696 transitions. [2021-07-13 19:16:32,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 13864 states and 35696 transitions. [2021-07-13 19:16:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:32,753 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:32,753 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:32,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:32,954 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash 309081427, now seen corresponding path program 208 times [2021-07-13 19:16:32,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:32,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043611165] [2021-07-13 19:16:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:33,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:33,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043611165] [2021-07-13 19:16:33,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043611165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969415712] [2021-07-13 19:16:33,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:33,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:33,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:33,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969415712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:33,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:33,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:16:33,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888016475] [2021-07-13 19:16:33,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:33,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:33,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:33,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:33,148 INFO L87 Difference]: Start difference. First operand 13864 states and 35696 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:33,444 INFO L93 Difference]: Finished difference Result 16347 states and 40212 transitions. [2021-07-13 19:16:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:33,476 INFO L225 Difference]: With dead ends: 16347 [2021-07-13 19:16:33,476 INFO L226 Difference]: Without dead ends: 16296 [2021-07-13 19:16:33,477 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:16:33,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-07-13 19:16:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 13554. [2021-07-13 19:16:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13554 states, 13553 states have (on average 2.570353427285472) internal successors, (34836), 13553 states have internal predecessors, (34836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:33,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13554 states to 13554 states and 34836 transitions. [2021-07-13 19:16:33,782 INFO L78 Accepts]: Start accepts. Automaton has 13554 states and 34836 transitions. Word has length 53 [2021-07-13 19:16:33,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:33,782 INFO L482 AbstractCegarLoop]: Abstraction has 13554 states and 34836 transitions. [2021-07-13 19:16:33,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 13554 states and 34836 transitions. [2021-07-13 19:16:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:33,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:33,793 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:33,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:33,994 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:33,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:33,994 INFO L82 PathProgramCache]: Analyzing trace with hash 2031484712, now seen corresponding path program 209 times [2021-07-13 19:16:33,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:33,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128046847] [2021-07-13 19:16:33,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:34,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:34,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128046847] [2021-07-13 19:16:34,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128046847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:34,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991157315] [2021-07-13 19:16:34,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:34,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:16:34,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:34,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:34,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991157315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:34,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:34,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:16:34,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121023985] [2021-07-13 19:16:34,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:34,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:34,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:34,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:34,219 INFO L87 Difference]: Start difference. First operand 13554 states and 34836 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:34,982 INFO L93 Difference]: Finished difference Result 18422 states and 44497 transitions. [2021-07-13 19:16:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:16:34,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:35,013 INFO L225 Difference]: With dead ends: 18422 [2021-07-13 19:16:35,014 INFO L226 Difference]: Without dead ends: 17582 [2021-07-13 19:16:35,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 318.5ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:16:35,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2021-07-13 19:16:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 10239. [2021-07-13 19:16:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 2.551279546786482) internal successors, (26120), 10238 states have internal predecessors, (26120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 26120 transitions. [2021-07-13 19:16:35,213 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 26120 transitions. Word has length 53 [2021-07-13 19:16:35,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:35,213 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 26120 transitions. [2021-07-13 19:16:35,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 26120 transitions. [2021-07-13 19:16:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:35,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:35,222 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:35,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:35,423 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:35,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:35,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1793423195, now seen corresponding path program 95 times [2021-07-13 19:16:35,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:35,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051624312] [2021-07-13 19:16:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:35,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:35,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051624312] [2021-07-13 19:16:35,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051624312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:35,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411818735] [2021-07-13 19:16:35,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:35,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:16:35,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:35,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:35,615 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:35,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411818735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:35,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:35,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2021-07-13 19:16:35,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202380] [2021-07-13 19:16:35,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:16:35,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:35,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:16:35,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:35,616 INFO L87 Difference]: Start difference. First operand 10239 states and 26120 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:35,908 INFO L93 Difference]: Finished difference Result 12499 states and 30979 transitions. [2021-07-13 19:16:35,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:16:35,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:35,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:35,928 INFO L225 Difference]: With dead ends: 12499 [2021-07-13 19:16:35,928 INFO L226 Difference]: Without dead ends: 12485 [2021-07-13 19:16:35,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 95.0ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:16:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12485 states. [2021-07-13 19:16:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12485 to 10638. [2021-07-13 19:16:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 10637 states have (on average 2.5578640594152486) internal successors, (27208), 10637 states have internal predecessors, (27208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 27208 transitions. [2021-07-13 19:16:36,153 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 27208 transitions. Word has length 53 [2021-07-13 19:16:36,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:36,153 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 27208 transitions. [2021-07-13 19:16:36,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,153 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 27208 transitions. [2021-07-13 19:16:36,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:36,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:36,162 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:36,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-07-13 19:16:36,362 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1171542785, now seen corresponding path program 96 times [2021-07-13 19:16:36,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:36,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726114377] [2021-07-13 19:16:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:36,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:36,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726114377] [2021-07-13 19:16:36,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726114377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:36,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030499258] [2021-07-13 19:16:36,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:36,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 19:16:36,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:36,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:36,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030499258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:36,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:36,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:16:36,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234245891] [2021-07-13 19:16:36,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:16:36,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:36,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:16:36,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:36,533 INFO L87 Difference]: Start difference. First operand 10638 states and 27208 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:36,794 INFO L93 Difference]: Finished difference Result 14368 states and 35164 transitions. [2021-07-13 19:16:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:36,820 INFO L225 Difference]: With dead ends: 14368 [2021-07-13 19:16:36,820 INFO L226 Difference]: Without dead ends: 14368 [2021-07-13 19:16:36,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:16:36,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14368 states. [2021-07-13 19:16:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14368 to 10646. [2021-07-13 19:16:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10646 states, 10645 states have (on average 2.558290277125411) internal successors, (27233), 10645 states have internal predecessors, (27233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 27233 transitions. [2021-07-13 19:16:37,007 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 27233 transitions. Word has length 53 [2021-07-13 19:16:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:37,007 INFO L482 AbstractCegarLoop]: Abstraction has 10646 states and 27233 transitions. [2021-07-13 19:16:37,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 27233 transitions. [2021-07-13 19:16:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:37,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:37,016 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:37,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:37,217 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:37,217 INFO L82 PathProgramCache]: Analyzing trace with hash -466029671, now seen corresponding path program 97 times [2021-07-13 19:16:37,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:37,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368527939] [2021-07-13 19:16:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:37,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:37,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368527939] [2021-07-13 19:16:37,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368527939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:37,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635299740] [2021-07-13 19:16:37,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:37,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:37,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:37,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635299740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:37,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:37,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:16:37,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357438482] [2021-07-13 19:16:37,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:37,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:37,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:37,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:37,394 INFO L87 Difference]: Start difference. First operand 10646 states and 27233 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:37,749 INFO L93 Difference]: Finished difference Result 15753 states and 38328 transitions. [2021-07-13 19:16:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:16:37,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:37,778 INFO L225 Difference]: With dead ends: 15753 [2021-07-13 19:16:37,778 INFO L226 Difference]: Without dead ends: 15753 [2021-07-13 19:16:37,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:16:37,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15753 states. [2021-07-13 19:16:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15753 to 10665. [2021-07-13 19:16:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10665 states, 10664 states have (on average 2.559358589647412) internal successors, (27293), 10664 states have internal predecessors, (27293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10665 states to 10665 states and 27293 transitions. [2021-07-13 19:16:37,984 INFO L78 Accepts]: Start accepts. Automaton has 10665 states and 27293 transitions. Word has length 53 [2021-07-13 19:16:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:37,984 INFO L482 AbstractCegarLoop]: Abstraction has 10665 states and 27293 transitions. [2021-07-13 19:16:37,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 10665 states and 27293 transitions. [2021-07-13 19:16:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:37,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:37,993 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:38,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-07-13 19:16:38,194 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:38,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:38,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2138942461, now seen corresponding path program 98 times [2021-07-13 19:16:38,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:38,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996167742] [2021-07-13 19:16:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 96 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:38,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:38,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996167742] [2021-07-13 19:16:38,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996167742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:38,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909686057] [2021-07-13 19:16:38,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:38,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:38,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:38,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:38,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:38,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909686057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:38,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:38,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:16:38,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828701722] [2021-07-13 19:16:38,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:38,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:38,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:38,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:38,378 INFO L87 Difference]: Start difference. First operand 10665 states and 27293 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:38,799 INFO L93 Difference]: Finished difference Result 16162 states and 39295 transitions. [2021-07-13 19:16:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:16:38,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:38,825 INFO L225 Difference]: With dead ends: 16162 [2021-07-13 19:16:38,825 INFO L226 Difference]: Without dead ends: 16162 [2021-07-13 19:16:38,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:16:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16162 states. [2021-07-13 19:16:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16162 to 10690. [2021-07-13 19:16:39,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10690 states, 10689 states have (on average 2.560669847506783) internal successors, (27371), 10689 states have internal predecessors, (27371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 27371 transitions. [2021-07-13 19:16:39,042 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 27371 transitions. Word has length 53 [2021-07-13 19:16:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:39,042 INFO L482 AbstractCegarLoop]: Abstraction has 10690 states and 27371 transitions. [2021-07-13 19:16:39,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 27371 transitions. [2021-07-13 19:16:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:39,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:39,052 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:39,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:39,252 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:39,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:39,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1099655449, now seen corresponding path program 99 times [2021-07-13 19:16:39,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:39,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974023900] [2021-07-13 19:16:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 92 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:39,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:39,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974023900] [2021-07-13 19:16:39,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974023900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:39,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058246523] [2021-07-13 19:16:39,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:39,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:16:39,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:39,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:16:39,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:39,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058246523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:39,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:39,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-07-13 19:16:39,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625081491] [2021-07-13 19:16:39,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:16:39,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:39,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:16:39,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:39,499 INFO L87 Difference]: Start difference. First operand 10690 states and 27371 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:39,907 INFO L93 Difference]: Finished difference Result 12484 states and 30934 transitions. [2021-07-13 19:16:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:16:39,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:39,926 INFO L225 Difference]: With dead ends: 12484 [2021-07-13 19:16:39,926 INFO L226 Difference]: Without dead ends: 12484 [2021-07-13 19:16:39,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:16:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-07-13 19:16:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 10077. [2021-07-13 19:16:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10077 states, 10076 states have (on average 2.5562723302897976) internal successors, (25757), 10076 states have internal predecessors, (25757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10077 states to 10077 states and 25757 transitions. [2021-07-13 19:16:40,092 INFO L78 Accepts]: Start accepts. Automaton has 10077 states and 25757 transitions. Word has length 53 [2021-07-13 19:16:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:40,092 INFO L482 AbstractCegarLoop]: Abstraction has 10077 states and 25757 transitions. [2021-07-13 19:16:40,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,092 INFO L276 IsEmpty]: Start isEmpty. Operand 10077 states and 25757 transitions. [2021-07-13 19:16:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:40,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:40,101 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:40,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-07-13 19:16:40,302 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2113323565, now seen corresponding path program 210 times [2021-07-13 19:16:40,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:40,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358999160] [2021-07-13 19:16:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:40,409 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:40,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:40,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358999160] [2021-07-13 19:16:40,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358999160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:40,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033977800] [2021-07-13 19:16:40,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:40,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:16:40,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:40,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033977800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:40,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:40,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:16:40,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857362673] [2021-07-13 19:16:40,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:40,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:40,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:40,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:40,511 INFO L87 Difference]: Start difference. First operand 10077 states and 25757 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:40,759 INFO L93 Difference]: Finished difference Result 11675 states and 28615 transitions. [2021-07-13 19:16:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:40,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:40,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:40,776 INFO L225 Difference]: With dead ends: 11675 [2021-07-13 19:16:40,776 INFO L226 Difference]: Without dead ends: 11621 [2021-07-13 19:16:40,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:16:40,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11621 states. [2021-07-13 19:16:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11621 to 10086. [2021-07-13 19:16:40,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10086 states, 10085 states have (on average 2.5548834903321764) internal successors, (25766), 10085 states have internal predecessors, (25766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 25766 transitions. [2021-07-13 19:16:40,981 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 25766 transitions. Word has length 53 [2021-07-13 19:16:40,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:40,981 INFO L482 AbstractCegarLoop]: Abstraction has 10086 states and 25766 transitions. [2021-07-13 19:16:40,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 25766 transitions. [2021-07-13 19:16:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:40,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:40,990 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:41,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable741,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:41,190 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:41,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1980297346, now seen corresponding path program 100 times [2021-07-13 19:16:41,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:41,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444830776] [2021-07-13 19:16:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:41,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:41,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444830776] [2021-07-13 19:16:41,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444830776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:41,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644257399] [2021-07-13 19:16:41,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:41,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:41,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:41,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:41,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:41,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644257399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:41,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:41,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:16:41,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104609587] [2021-07-13 19:16:41,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:41,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:41,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:41,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:41,409 INFO L87 Difference]: Start difference. First operand 10086 states and 25766 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:42,032 INFO L93 Difference]: Finished difference Result 14226 states and 34514 transitions. [2021-07-13 19:16:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:16:42,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:42,054 INFO L225 Difference]: With dead ends: 14226 [2021-07-13 19:16:42,054 INFO L226 Difference]: Without dead ends: 13952 [2021-07-13 19:16:42,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:16:42,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13952 states. [2021-07-13 19:16:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13952 to 9958. [2021-07-13 19:16:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 2.552475645274681) internal successors, (25415), 9957 states have internal predecessors, (25415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:42,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 25415 transitions. [2021-07-13 19:16:42,229 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 25415 transitions. Word has length 53 [2021-07-13 19:16:42,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:42,229 INFO L482 AbstractCegarLoop]: Abstraction has 9958 states and 25415 transitions. [2021-07-13 19:16:42,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 25415 transitions. [2021-07-13 19:16:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:42,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:42,238 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:42,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-07-13 19:16:42,439 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:42,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:42,439 INFO L82 PathProgramCache]: Analyzing trace with hash -217067145, now seen corresponding path program 211 times [2021-07-13 19:16:42,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:42,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785798470] [2021-07-13 19:16:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:42,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:42,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785798470] [2021-07-13 19:16:42,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785798470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804338398] [2021-07-13 19:16:42,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:42,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:42,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:42,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804338398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:42,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:42,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:16:42,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822183729] [2021-07-13 19:16:42,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:42,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:42,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:42,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:42,642 INFO L87 Difference]: Start difference. First operand 9958 states and 25415 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:42,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:42,995 INFO L93 Difference]: Finished difference Result 12529 states and 31068 transitions. [2021-07-13 19:16:42,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:42,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:43,013 INFO L225 Difference]: With dead ends: 12529 [2021-07-13 19:16:43,013 INFO L226 Difference]: Without dead ends: 12529 [2021-07-13 19:16:43,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:16:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12529 states. [2021-07-13 19:16:43,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12529 to 10698. [2021-07-13 19:16:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10698 states, 10697 states have (on average 2.5853977750771246) internal successors, (27656), 10697 states have internal predecessors, (27656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10698 states to 10698 states and 27656 transitions. [2021-07-13 19:16:43,173 INFO L78 Accepts]: Start accepts. Automaton has 10698 states and 27656 transitions. Word has length 53 [2021-07-13 19:16:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:43,173 INFO L482 AbstractCegarLoop]: Abstraction has 10698 states and 27656 transitions. [2021-07-13 19:16:43,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 10698 states and 27656 transitions. [2021-07-13 19:16:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:43,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:43,182 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:43,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:43,382 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:43,382 INFO L82 PathProgramCache]: Analyzing trace with hash 2097202474, now seen corresponding path program 101 times [2021-07-13 19:16:43,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:43,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511115186] [2021-07-13 19:16:43,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:43,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:43,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:43,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511115186] [2021-07-13 19:16:43,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511115186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:43,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734265804] [2021-07-13 19:16:43,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:43,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:16:43,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:43,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:43,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:43,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734265804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:43,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:43,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:16:43,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734919818] [2021-07-13 19:16:43,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:43,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:43,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:43,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:43,594 INFO L87 Difference]: Start difference. First operand 10698 states and 27656 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:44,189 INFO L93 Difference]: Finished difference Result 14809 states and 36436 transitions. [2021-07-13 19:16:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:16:44,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:44,209 INFO L225 Difference]: With dead ends: 14809 [2021-07-13 19:16:44,209 INFO L226 Difference]: Without dead ends: 14757 [2021-07-13 19:16:44,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 259.6ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:16:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14757 states. [2021-07-13 19:16:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14757 to 10607. [2021-07-13 19:16:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 2.587309070337545) internal successors, (27441), 10606 states have internal predecessors, (27441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27441 transitions. [2021-07-13 19:16:44,375 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27441 transitions. Word has length 53 [2021-07-13 19:16:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:44,375 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27441 transitions. [2021-07-13 19:16:44,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27441 transitions. [2021-07-13 19:16:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:44,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:44,383 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:44,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-07-13 19:16:44,584 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:44,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1617639658, now seen corresponding path program 212 times [2021-07-13 19:16:44,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:44,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379866053] [2021-07-13 19:16:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:44,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:44,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379866053] [2021-07-13 19:16:44,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379866053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:44,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019533840] [2021-07-13 19:16:44,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:44,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:44,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:44,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019533840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:44,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:44,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-07-13 19:16:44,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198956378] [2021-07-13 19:16:44,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:16:44,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:16:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:44,904 INFO L87 Difference]: Start difference. First operand 10607 states and 27441 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:45,488 INFO L93 Difference]: Finished difference Result 10731 states and 27633 transitions. [2021-07-13 19:16:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:45,502 INFO L225 Difference]: With dead ends: 10731 [2021-07-13 19:16:45,502 INFO L226 Difference]: Without dead ends: 10675 [2021-07-13 19:16:45,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 192.6ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-07-13 19:16:45,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10607. [2021-07-13 19:16:45,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 2.5841976239864226) internal successors, (27408), 10606 states have internal predecessors, (27408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27408 transitions. [2021-07-13 19:16:45,642 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27408 transitions. Word has length 53 [2021-07-13 19:16:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:45,642 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27408 transitions. [2021-07-13 19:16:45,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27408 transitions. [2021-07-13 19:16:45,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:45,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:45,650 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:45,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-07-13 19:16:45,851 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash -290292687, now seen corresponding path program 102 times [2021-07-13 19:16:45,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:45,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481824203] [2021-07-13 19:16:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:45,932 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:16:45,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:45,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481824203] [2021-07-13 19:16:45,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481824203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:45,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731106357] [2021-07-13 19:16:45,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:45,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:16:45,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:45,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:45,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:46,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731106357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:46,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:46,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-07-13 19:16:46,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679562840] [2021-07-13 19:16:46,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:16:46,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:46,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:16:46,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:46,051 INFO L87 Difference]: Start difference. First operand 10607 states and 27408 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:46,371 INFO L93 Difference]: Finished difference Result 12680 states and 31642 transitions. [2021-07-13 19:16:46,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:46,372 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:46,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:46,386 INFO L225 Difference]: With dead ends: 12680 [2021-07-13 19:16:46,386 INFO L226 Difference]: Without dead ends: 12630 [2021-07-13 19:16:46,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:16:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12630 states. [2021-07-13 19:16:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12630 to 10144. [2021-07-13 19:16:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 2.5837523415163166) internal successors, (26207), 10143 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 26207 transitions. [2021-07-13 19:16:46,531 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 26207 transitions. Word has length 53 [2021-07-13 19:16:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:46,531 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 26207 transitions. [2021-07-13 19:16:46,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 26207 transitions. [2021-07-13 19:16:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:46,539 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:46,539 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:46,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:46,739 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:46,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1595716629, now seen corresponding path program 213 times [2021-07-13 19:16:46,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:46,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898135445] [2021-07-13 19:16:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:46,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:46,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898135445] [2021-07-13 19:16:46,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898135445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:46,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81569707] [2021-07-13 19:16:46,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:46,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:16:46,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:46,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:46,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81569707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:46,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:46,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:16:46,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463105460] [2021-07-13 19:16:46,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:46,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:46,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:46,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:46,925 INFO L87 Difference]: Start difference. First operand 10144 states and 26207 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:47,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:47,193 INFO L93 Difference]: Finished difference Result 12591 states and 31328 transitions. [2021-07-13 19:16:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:47,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:47,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:47,211 INFO L225 Difference]: With dead ends: 12591 [2021-07-13 19:16:47,212 INFO L226 Difference]: Without dead ends: 12591 [2021-07-13 19:16:47,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:16:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12591 states. [2021-07-13 19:16:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 10616. [2021-07-13 19:16:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10616 states, 10615 states have (on average 2.6016015073009893) internal successors, (27616), 10615 states have internal predecessors, (27616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:47,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10616 states to 10616 states and 27616 transitions. [2021-07-13 19:16:47,370 INFO L78 Accepts]: Start accepts. Automaton has 10616 states and 27616 transitions. Word has length 53 [2021-07-13 19:16:47,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:47,370 INFO L482 AbstractCegarLoop]: Abstraction has 10616 states and 27616 transitions. [2021-07-13 19:16:47,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:47,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10616 states and 27616 transitions. [2021-07-13 19:16:47,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:47,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:47,378 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:47,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-07-13 19:16:47,578 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:47,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2006879870, now seen corresponding path program 103 times [2021-07-13 19:16:47,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:47,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370484343] [2021-07-13 19:16:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:47,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:47,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370484343] [2021-07-13 19:16:47,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370484343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:47,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356018706] [2021-07-13 19:16:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:47,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:47,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:47,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356018706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:47,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:47,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:16:47,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288066641] [2021-07-13 19:16:47,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:47,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:47,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:47,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:47,782 INFO L87 Difference]: Start difference. First operand 10616 states and 27616 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:48,297 INFO L93 Difference]: Finished difference Result 13894 states and 34616 transitions. [2021-07-13 19:16:48,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:16:48,298 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:48,318 INFO L225 Difference]: With dead ends: 13894 [2021-07-13 19:16:48,318 INFO L226 Difference]: Without dead ends: 13880 [2021-07-13 19:16:48,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 219.1ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:16:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13880 states. [2021-07-13 19:16:48,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13880 to 10564. [2021-07-13 19:16:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10564 states, 10563 states have (on average 2.6058884786518983) internal successors, (27526), 10563 states have internal predecessors, (27526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:48,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27526 transitions. [2021-07-13 19:16:48,556 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27526 transitions. Word has length 53 [2021-07-13 19:16:48,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:48,556 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27526 transitions. [2021-07-13 19:16:48,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:48,556 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27526 transitions. [2021-07-13 19:16:48,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:48,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:48,563 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:48,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:48,763 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:48,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2126035330, now seen corresponding path program 214 times [2021-07-13 19:16:48,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:48,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664325897] [2021-07-13 19:16:48,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:48,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:48,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664325897] [2021-07-13 19:16:48,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664325897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:48,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460056244] [2021-07-13 19:16:48,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:48,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:48,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:48,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:48,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:49,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460056244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:49,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:49,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:16:49,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469272430] [2021-07-13 19:16:49,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:16:49,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:16:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:49,042 INFO L87 Difference]: Start difference. First operand 10564 states and 27526 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:49,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:49,547 INFO L93 Difference]: Finished difference Result 10719 states and 27762 transitions. [2021-07-13 19:16:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:16:49,547 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:49,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:49,562 INFO L225 Difference]: With dead ends: 10719 [2021-07-13 19:16:49,562 INFO L226 Difference]: Without dead ends: 10675 [2021-07-13 19:16:49,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-07-13 19:16:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10564. [2021-07-13 19:16:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10564 states, 10563 states have (on average 2.6041844173056896) internal successors, (27508), 10563 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27508 transitions. [2021-07-13 19:16:49,705 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27508 transitions. Word has length 53 [2021-07-13 19:16:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:49,705 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27508 transitions. [2021-07-13 19:16:49,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27508 transitions. [2021-07-13 19:16:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:49,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:49,713 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:49,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-13 19:16:49,914 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:49,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:49,914 INFO L82 PathProgramCache]: Analyzing trace with hash 145337653, now seen corresponding path program 104 times [2021-07-13 19:16:49,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:49,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695281714] [2021-07-13 19:16:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:49,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:49,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695281714] [2021-07-13 19:16:49,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695281714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:49,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140043802] [2021-07-13 19:16:49,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:50,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:50,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:50,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:16:50,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140043802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:50,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:50,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:16:50,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797087964] [2021-07-13 19:16:50,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:50,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:50,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:50,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:50,101 INFO L87 Difference]: Start difference. First operand 10564 states and 27508 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:50,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:50,318 INFO L93 Difference]: Finished difference Result 12086 states and 30576 transitions. [2021-07-13 19:16:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:50,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:50,336 INFO L225 Difference]: With dead ends: 12086 [2021-07-13 19:16:50,336 INFO L226 Difference]: Without dead ends: 12002 [2021-07-13 19:16:50,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:16:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-07-13 19:16:50,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 9748. [2021-07-13 19:16:50,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9748 states, 9747 states have (on average 2.6030573509797885) internal successors, (25372), 9747 states have internal predecessors, (25372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9748 states to 9748 states and 25372 transitions. [2021-07-13 19:16:50,494 INFO L78 Accepts]: Start accepts. Automaton has 9748 states and 25372 transitions. Word has length 53 [2021-07-13 19:16:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:50,494 INFO L482 AbstractCegarLoop]: Abstraction has 9748 states and 25372 transitions. [2021-07-13 19:16:50,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 9748 states and 25372 transitions. [2021-07-13 19:16:50,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:50,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:50,502 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:50,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable762,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:50,703 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:50,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1808139831, now seen corresponding path program 215 times [2021-07-13 19:16:50,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:50,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646109435] [2021-07-13 19:16:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:50,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:50,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646109435] [2021-07-13 19:16:50,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646109435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:50,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464374887] [2021-07-13 19:16:50,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:50,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:16:50,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:50,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:50,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:50,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464374887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:50,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:50,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-07-13 19:16:50,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495920732] [2021-07-13 19:16:50,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:50,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:50,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:50,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:50,893 INFO L87 Difference]: Start difference. First operand 9748 states and 25372 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:51,178 INFO L93 Difference]: Finished difference Result 12328 states and 30680 transitions. [2021-07-13 19:16:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:16:51,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:51,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:51,199 INFO L225 Difference]: With dead ends: 12328 [2021-07-13 19:16:51,231 INFO L226 Difference]: Without dead ends: 12328 [2021-07-13 19:16:51,231 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12328 states. [2021-07-13 19:16:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12328 to 10133. [2021-07-13 19:16:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.618041847611528) internal successors, (26526), 10132 states have internal predecessors, (26526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 26526 transitions. [2021-07-13 19:16:51,372 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 26526 transitions. Word has length 53 [2021-07-13 19:16:51,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:51,373 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 26526 transitions. [2021-07-13 19:16:51,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 26526 transitions. [2021-07-13 19:16:51,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:51,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:51,381 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:51,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:51,581 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:51,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:51,581 INFO L82 PathProgramCache]: Analyzing trace with hash -933239766, now seen corresponding path program 105 times [2021-07-13 19:16:51,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:51,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910684494] [2021-07-13 19:16:51,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:51,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:51,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910684494] [2021-07-13 19:16:51,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910684494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:51,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766079720] [2021-07-13 19:16:51,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:51,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:16:51,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:51,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:51,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766079720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:51,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:51,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:16:51,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171336083] [2021-07-13 19:16:51,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:51,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:51,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:51,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:51,770 INFO L87 Difference]: Start difference. First operand 10133 states and 26526 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:52,266 INFO L93 Difference]: Finished difference Result 12314 states and 31139 transitions. [2021-07-13 19:16:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:16:52,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:52,287 INFO L225 Difference]: With dead ends: 12314 [2021-07-13 19:16:52,287 INFO L226 Difference]: Without dead ends: 12300 [2021-07-13 19:16:52,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:16:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12300 states. [2021-07-13 19:16:52,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 10160. [2021-07-13 19:16:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 2.6188601240279556) internal successors, (26605), 10159 states have internal predecessors, (26605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26605 transitions. [2021-07-13 19:16:52,464 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26605 transitions. Word has length 53 [2021-07-13 19:16:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:52,464 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26605 transitions. [2021-07-13 19:16:52,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26605 transitions. [2021-07-13 19:16:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:52,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:52,473 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:52,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable769 [2021-07-13 19:16:52,673 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1110130710, now seen corresponding path program 216 times [2021-07-13 19:16:52,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:52,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479745315] [2021-07-13 19:16:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:52,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:52,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479745315] [2021-07-13 19:16:52,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479745315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:52,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591306321] [2021-07-13 19:16:52,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:52,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:16:52,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:52,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:52,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591306321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:52,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:52,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-13 19:16:52,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64278363] [2021-07-13 19:16:52,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:16:52,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:52,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:16:52,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:52,940 INFO L87 Difference]: Start difference. First operand 10160 states and 26605 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:53,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:53,350 INFO L93 Difference]: Finished difference Result 10211 states and 26683 transitions. [2021-07-13 19:16:53,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:53,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:53,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:53,366 INFO L225 Difference]: With dead ends: 10211 [2021-07-13 19:16:53,367 INFO L226 Difference]: Without dead ends: 10179 [2021-07-13 19:16:53,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:16:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10179 states. [2021-07-13 19:16:53,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10179 to 10160. [2021-07-13 19:16:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 2.6182695147160153) internal successors, (26599), 10159 states have internal predecessors, (26599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26599 transitions. [2021-07-13 19:16:53,517 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26599 transitions. Word has length 53 [2021-07-13 19:16:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:53,517 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26599 transitions. [2021-07-13 19:16:53,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26599 transitions. [2021-07-13 19:16:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:53,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:53,526 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:53,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:53,727 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1855932587, now seen corresponding path program 217 times [2021-07-13 19:16:53,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:53,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056432549] [2021-07-13 19:16:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:53,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:53,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056432549] [2021-07-13 19:16:53,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056432549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:53,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647412080] [2021-07-13 19:16:53,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:53,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:16:53,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:53,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647412080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:53,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:53,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 19:16:53,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598684215] [2021-07-13 19:16:53,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:53,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:53,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:53,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:53,966 INFO L87 Difference]: Start difference. First operand 10160 states and 26599 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:54,198 INFO L93 Difference]: Finished difference Result 12704 states and 31833 transitions. [2021-07-13 19:16:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:16:54,198 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:54,220 INFO L225 Difference]: With dead ends: 12704 [2021-07-13 19:16:54,220 INFO L226 Difference]: Without dead ends: 12704 [2021-07-13 19:16:54,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12704 states. [2021-07-13 19:16:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12704 to 10580. [2021-07-13 19:16:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 2.632668494186596) internal successors, (27851), 10579 states have internal predecessors, (27851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 27851 transitions. [2021-07-13 19:16:54,422 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 27851 transitions. Word has length 53 [2021-07-13 19:16:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:54,422 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 27851 transitions. [2021-07-13 19:16:54,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 27851 transitions. [2021-07-13 19:16:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:54,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:54,431 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:54,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-07-13 19:16:54,632 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:54,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1668199042, now seen corresponding path program 106 times [2021-07-13 19:16:54,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:54,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569269725] [2021-07-13 19:16:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:54,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569269725] [2021-07-13 19:16:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569269725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932484334] [2021-07-13 19:16:54,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:54,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:54,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:54,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:16:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:54,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:16:54,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:16:54,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:54,821 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:16:54,821 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:16:54,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:54,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:16:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:54,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932484334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:54,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:54,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 19:16:54,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54847276] [2021-07-13 19:16:54,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:54,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:54,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:54,827 INFO L87 Difference]: Start difference. First operand 10580 states and 27851 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:55,443 INFO L93 Difference]: Finished difference Result 13655 states and 34305 transitions. [2021-07-13 19:16:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:16:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:55,467 INFO L225 Difference]: With dead ends: 13655 [2021-07-13 19:16:55,467 INFO L226 Difference]: Without dead ends: 13599 [2021-07-13 19:16:55,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:16:55,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-07-13 19:16:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 11353. [2021-07-13 19:16:55,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 2.6204193093727977) internal successors, (29747), 11352 states have internal predecessors, (29747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29747 transitions. [2021-07-13 19:16:55,645 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29747 transitions. Word has length 53 [2021-07-13 19:16:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:55,645 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29747 transitions. [2021-07-13 19:16:55,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29747 transitions. [2021-07-13 19:16:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:55,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:55,654 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:55,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-07-13 19:16:55,857 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash 34902658, now seen corresponding path program 218 times [2021-07-13 19:16:55,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:55,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594565226] [2021-07-13 19:16:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:55,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:55,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594565226] [2021-07-13 19:16:55,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594565226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:55,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867731474] [2021-07-13 19:16:55,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:55,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:16:55,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:55,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:56,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867731474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:56,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-13 19:16:56,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22021858] [2021-07-13 19:16:56,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:56,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:56,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:56,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:56,070 INFO L87 Difference]: Start difference. First operand 11353 states and 29747 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:56,430 INFO L93 Difference]: Finished difference Result 11423 states and 29849 transitions. [2021-07-13 19:16:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:16:56,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:56,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:56,447 INFO L225 Difference]: With dead ends: 11423 [2021-07-13 19:16:56,447 INFO L226 Difference]: Without dead ends: 11403 [2021-07-13 19:16:56,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:56,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11403 states. [2021-07-13 19:16:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11403 to 11353. [2021-07-13 19:16:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 2.62015503875969) internal successors, (29744), 11352 states have internal predecessors, (29744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29744 transitions. [2021-07-13 19:16:56,609 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29744 transitions. Word has length 53 [2021-07-13 19:16:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:56,609 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29744 transitions. [2021-07-13 19:16:56,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29744 transitions. [2021-07-13 19:16:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:56,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:56,618 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:56,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:56,819 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:56,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1588490357, now seen corresponding path program 107 times [2021-07-13 19:16:56,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:56,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122623328] [2021-07-13 19:16:56,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:56,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:56,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122623328] [2021-07-13 19:16:56,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122623328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:56,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250662096] [2021-07-13 19:16:56,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:56,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:16:56,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:56,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250662096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:57,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-07-13 19:16:57,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143489026] [2021-07-13 19:16:57,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:16:57,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:57,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:16:57,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:16:57,042 INFO L87 Difference]: Start difference. First operand 11353 states and 29744 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:57,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:57,359 INFO L93 Difference]: Finished difference Result 12639 states and 32192 transitions. [2021-07-13 19:16:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:16:57,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:57,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:57,382 INFO L225 Difference]: With dead ends: 12639 [2021-07-13 19:16:57,382 INFO L226 Difference]: Without dead ends: 12617 [2021-07-13 19:16:57,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 128.3ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:16:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12617 states. [2021-07-13 19:16:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 11299. [2021-07-13 19:16:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11299 states, 11298 states have (on average 2.6222340237210124) internal successors, (29626), 11298 states have internal predecessors, (29626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11299 states to 11299 states and 29626 transitions. [2021-07-13 19:16:57,570 INFO L78 Accepts]: Start accepts. Automaton has 11299 states and 29626 transitions. Word has length 53 [2021-07-13 19:16:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:57,570 INFO L482 AbstractCegarLoop]: Abstraction has 11299 states and 29626 transitions. [2021-07-13 19:16:57,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:57,570 INFO L276 IsEmpty]: Start isEmpty. Operand 11299 states and 29626 transitions. [2021-07-13 19:16:57,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:57,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:57,579 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:57,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-07-13 19:16:57,779 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:57,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1668467447, now seen corresponding path program 219 times [2021-07-13 19:16:57,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:57,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787985269] [2021-07-13 19:16:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:57,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:57,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787985269] [2021-07-13 19:16:57,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787985269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451696921] [2021-07-13 19:16:57,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:57,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:16:57,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:57,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:57,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451696921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:57,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:16:57,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135665209] [2021-07-13 19:16:57,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:57,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:57,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:57,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:57,958 INFO L87 Difference]: Start difference. First operand 11299 states and 29626 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:58,122 INFO L93 Difference]: Finished difference Result 14216 states and 35571 transitions. [2021-07-13 19:16:58,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:58,144 INFO L225 Difference]: With dead ends: 14216 [2021-07-13 19:16:58,144 INFO L226 Difference]: Without dead ends: 14216 [2021-07-13 19:16:58,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14216 states. [2021-07-13 19:16:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14216 to 11759. [2021-07-13 19:16:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.634886885524749) internal successors, (30981), 11758 states have internal predecessors, (30981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30981 transitions. [2021-07-13 19:16:58,350 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30981 transitions. Word has length 53 [2021-07-13 19:16:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:58,351 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30981 transitions. [2021-07-13 19:16:58,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:58,351 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30981 transitions. [2021-07-13 19:16:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:58,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:58,360 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:58,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:58,561 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1430405930, now seen corresponding path program 108 times [2021-07-13 19:16:58,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:58,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617253162] [2021-07-13 19:16:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:58,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:58,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617253162] [2021-07-13 19:16:58,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617253162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:58,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040823549] [2021-07-13 19:16:58,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:58,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:16:58,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:58,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:16:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:58,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040823549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:58,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:58,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:16:58,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499358497] [2021-07-13 19:16:58,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:58,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:58,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:58,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:58,795 INFO L87 Difference]: Start difference. First operand 11759 states and 30981 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:59,228 INFO L93 Difference]: Finished difference Result 12771 states and 32920 transitions. [2021-07-13 19:16:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:16:59,228 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:59,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:59,246 INFO L225 Difference]: With dead ends: 12771 [2021-07-13 19:16:59,246 INFO L226 Difference]: Without dead ends: 12763 [2021-07-13 19:16:59,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:16:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-07-13 19:16:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 11651. [2021-07-13 19:16:59,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11651 states, 11650 states have (on average 2.6366523605150216) internal successors, (30717), 11650 states have internal predecessors, (30717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11651 states to 11651 states and 30717 transitions. [2021-07-13 19:16:59,413 INFO L78 Accepts]: Start accepts. Automaton has 11651 states and 30717 transitions. Word has length 53 [2021-07-13 19:16:59,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:59,414 INFO L482 AbstractCegarLoop]: Abstraction has 11651 states and 30717 transitions. [2021-07-13 19:16:59,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11651 states and 30717 transitions. [2021-07-13 19:16:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:16:59,422 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:59,423 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:59,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:59,623 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:59,623 INFO L82 PathProgramCache]: Analyzing trace with hash -123290927, now seen corresponding path program 220 times [2021-07-13 19:16:59,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:59,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608586511] [2021-07-13 19:16:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:59,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:59,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608586511] [2021-07-13 19:16:59,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608586511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652175359] [2021-07-13 19:16:59,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:59,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:59,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:59,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:16:59,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:16:59,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652175359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:59,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:59,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:16:59,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666105040] [2021-07-13 19:16:59,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:16:59,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:59,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:16:59,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:16:59,782 INFO L87 Difference]: Start difference. First operand 11651 states and 30717 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:59,936 INFO L93 Difference]: Finished difference Result 13925 states and 34879 transitions. [2021-07-13 19:16:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:59,936 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:16:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:59,960 INFO L225 Difference]: With dead ends: 13925 [2021-07-13 19:16:59,960 INFO L226 Difference]: Without dead ends: 13922 [2021-07-13 19:16:59,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:16:59,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13922 states. [2021-07-13 19:17:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13922 to 11650. [2021-07-13 19:17:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.6362777920851577) internal successors, (30710), 11649 states have internal predecessors, (30710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30710 transitions. [2021-07-13 19:17:00,149 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30710 transitions. Word has length 53 [2021-07-13 19:17:00,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:00,149 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30710 transitions. [2021-07-13 19:17:00,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,149 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30710 transitions. [2021-07-13 19:17:00,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:00,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:00,158 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:00,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:00,358 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:00,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash 83771639, now seen corresponding path program 221 times [2021-07-13 19:17:00,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:00,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507355952] [2021-07-13 19:17:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:00,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:00,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507355952] [2021-07-13 19:17:00,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507355952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658575501] [2021-07-13 19:17:00,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:00,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:17:00,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:00,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:00,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:00,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658575501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:00,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:00,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-07-13 19:17:00,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367156606] [2021-07-13 19:17:00,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:00,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:00,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:00,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:00,558 INFO L87 Difference]: Start difference. First operand 11650 states and 30710 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:00,752 INFO L93 Difference]: Finished difference Result 14037 states and 35373 transitions. [2021-07-13 19:17:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:00,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:00,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:00,777 INFO L225 Difference]: With dead ends: 14037 [2021-07-13 19:17:00,777 INFO L226 Difference]: Without dead ends: 14025 [2021-07-13 19:17:00,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-07-13 19:17:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 11650. [2021-07-13 19:17:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.636020259249721) internal successors, (30707), 11649 states have internal predecessors, (30707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30707 transitions. [2021-07-13 19:17:00,987 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30707 transitions. Word has length 53 [2021-07-13 19:17:00,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:00,987 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30707 transitions. [2021-07-13 19:17:00,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:00,987 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30707 transitions. [2021-07-13 19:17:00,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:00,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:00,996 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:01,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-07-13 19:17:01,196 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:01,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1364228374, now seen corresponding path program 222 times [2021-07-13 19:17:01,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:01,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132641200] [2021-07-13 19:17:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:01,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132641200] [2021-07-13 19:17:01,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132641200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445642861] [2021-07-13 19:17:01,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:01,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:17:01,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:01,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:17:01,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:01,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445642861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:01,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:01,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-13 19:17:01,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149790807] [2021-07-13 19:17:01,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:01,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:01,380 INFO L87 Difference]: Start difference. First operand 11650 states and 30707 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:01,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:01,901 INFO L93 Difference]: Finished difference Result 12517 states and 32320 transitions. [2021-07-13 19:17:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:01,901 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:01,922 INFO L225 Difference]: With dead ends: 12517 [2021-07-13 19:17:01,922 INFO L226 Difference]: Without dead ends: 12384 [2021-07-13 19:17:01,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:01,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12384 states. [2021-07-13 19:17:02,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12384 to 11825. [2021-07-13 19:17:02,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11825 states, 11824 states have (on average 2.6268606224627877) internal successors, (31060), 11824 states have internal predecessors, (31060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11825 states to 11825 states and 31060 transitions. [2021-07-13 19:17:02,099 INFO L78 Accepts]: Start accepts. Automaton has 11825 states and 31060 transitions. Word has length 53 [2021-07-13 19:17:02,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:02,099 INFO L482 AbstractCegarLoop]: Abstraction has 11825 states and 31060 transitions. [2021-07-13 19:17:02,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,099 INFO L276 IsEmpty]: Start isEmpty. Operand 11825 states and 31060 transitions. [2021-07-13 19:17:02,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:02,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:02,108 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:02,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-07-13 19:17:02,308 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:02,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1977764554, now seen corresponding path program 223 times [2021-07-13 19:17:02,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:02,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155453480] [2021-07-13 19:17:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:02,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:02,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155453480] [2021-07-13 19:17:02,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155453480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105919732] [2021-07-13 19:17:02,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:02,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:17:02,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:02,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105919732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:02,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:02,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-13 19:17:02,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242766181] [2021-07-13 19:17:02,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:17:02,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:02,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:17:02,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:17:02,482 INFO L87 Difference]: Start difference. First operand 11825 states and 31060 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:02,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:02,839 INFO L93 Difference]: Finished difference Result 12581 states and 32513 transitions. [2021-07-13 19:17:02,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:02,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:02,862 INFO L225 Difference]: With dead ends: 12581 [2021-07-13 19:17:02,862 INFO L226 Difference]: Without dead ends: 12569 [2021-07-13 19:17:02,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:02,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12569 states. [2021-07-13 19:17:03,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12569 to 11827. [2021-07-13 19:17:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11827 states, 11826 states have (on average 2.6267546084897684) internal successors, (31064), 11826 states have internal predecessors, (31064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11827 states to 11827 states and 31064 transitions. [2021-07-13 19:17:03,039 INFO L78 Accepts]: Start accepts. Automaton has 11827 states and 31064 transitions. Word has length 53 [2021-07-13 19:17:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:03,039 INFO L482 AbstractCegarLoop]: Abstraction has 11827 states and 31064 transitions. [2021-07-13 19:17:03,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 11827 states and 31064 transitions. [2021-07-13 19:17:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:03,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:03,048 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:03,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:03,248 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:03,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash 164152780, now seen corresponding path program 224 times [2021-07-13 19:17:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:03,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297534794] [2021-07-13 19:17:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:03,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:03,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297534794] [2021-07-13 19:17:03,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297534794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:03,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786602579] [2021-07-13 19:17:03,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:03,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:03,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:17:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:03,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786602579] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:03,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:03,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:03,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070114598] [2021-07-13 19:17:03,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:03,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:03,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:03,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:03,487 INFO L87 Difference]: Start difference. First operand 11827 states and 31064 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:04,101 INFO L93 Difference]: Finished difference Result 13836 states and 35142 transitions. [2021-07-13 19:17:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:17:04,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:04,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:04,125 INFO L225 Difference]: With dead ends: 13836 [2021-07-13 19:17:04,125 INFO L226 Difference]: Without dead ends: 13782 [2021-07-13 19:17:04,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:17:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13782 states. [2021-07-13 19:17:04,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13782 to 11958. [2021-07-13 19:17:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11958 states, 11957 states have (on average 2.6264113071840764) internal successors, (31404), 11957 states have internal predecessors, (31404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11958 states to 11958 states and 31404 transitions. [2021-07-13 19:17:04,338 INFO L78 Accepts]: Start accepts. Automaton has 11958 states and 31404 transitions. Word has length 53 [2021-07-13 19:17:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:04,338 INFO L482 AbstractCegarLoop]: Abstraction has 11958 states and 31404 transitions. [2021-07-13 19:17:04,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11958 states and 31404 transitions. [2021-07-13 19:17:04,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:04,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:04,347 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:04,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-07-13 19:17:04,547 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1696711889, now seen corresponding path program 225 times [2021-07-13 19:17:04,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:04,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167295986] [2021-07-13 19:17:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:04,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:04,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167295986] [2021-07-13 19:17:04,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167295986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:04,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607066395] [2021-07-13 19:17:04,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:04,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:17:04,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:04,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:04,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:04,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607066395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:04,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:04,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:17:04,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550231878] [2021-07-13 19:17:04,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:04,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:04,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:04,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:04,725 INFO L87 Difference]: Start difference. First operand 11958 states and 31404 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:04,887 INFO L93 Difference]: Finished difference Result 14190 states and 35732 transitions. [2021-07-13 19:17:04,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:04,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:04,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:04,908 INFO L225 Difference]: With dead ends: 14190 [2021-07-13 19:17:04,908 INFO L226 Difference]: Without dead ends: 14172 [2021-07-13 19:17:04,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14172 states. [2021-07-13 19:17:05,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14172 to 12156. [2021-07-13 19:17:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12156 states, 12155 states have (on average 2.6338955162484576) internal successors, (32015), 12155 states have internal predecessors, (32015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 32015 transitions. [2021-07-13 19:17:05,116 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 32015 transitions. Word has length 53 [2021-07-13 19:17:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:05,116 INFO L482 AbstractCegarLoop]: Abstraction has 12156 states and 32015 transitions. [2021-07-13 19:17:05,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 32015 transitions. [2021-07-13 19:17:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:05,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:05,126 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:05,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-07-13 19:17:05,326 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:05,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:05,326 INFO L82 PathProgramCache]: Analyzing trace with hash 318989314, now seen corresponding path program 226 times [2021-07-13 19:17:05,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:05,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935533685] [2021-07-13 19:17:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:05,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:05,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:05,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935533685] [2021-07-13 19:17:05,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935533685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407577954] [2021-07-13 19:17:05,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:05,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:05,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:05,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:17:05,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:05,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:17:05,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:17:05,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:05,547 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:17:05,547 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:17:05,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:05,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:17:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:05,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407577954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:05,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:05,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-13 19:17:05,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830209254] [2021-07-13 19:17:05,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:05,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:05,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:05,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:05,554 INFO L87 Difference]: Start difference. First operand 12156 states and 32015 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:06,686 INFO L93 Difference]: Finished difference Result 16988 states and 42019 transitions. [2021-07-13 19:17:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-13 19:17:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:06,715 INFO L225 Difference]: With dead ends: 16988 [2021-07-13 19:17:06,716 INFO L226 Difference]: Without dead ends: 16820 [2021-07-13 19:17:06,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=321, Invalid=2649, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:17:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16820 states. [2021-07-13 19:17:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16820 to 12541. [2021-07-13 19:17:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 12540 states have (on average 2.6271132376395534) internal successors, (32944), 12540 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32944 transitions. [2021-07-13 19:17:06,962 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32944 transitions. Word has length 53 [2021-07-13 19:17:06,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:06,962 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32944 transitions. [2021-07-13 19:17:06,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:06,962 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32944 transitions. [2021-07-13 19:17:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:06,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:06,972 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:07,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable793,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:07,173 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 705591991, now seen corresponding path program 227 times [2021-07-13 19:17:07,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:07,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638850447] [2021-07-13 19:17:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:07,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:07,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638850447] [2021-07-13 19:17:07,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638850447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371007063] [2021-07-13 19:17:07,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:07,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:17:07,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:07,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:07,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:07,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371007063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:07,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:07,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-07-13 19:17:07,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667410444] [2021-07-13 19:17:07,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:07,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:07,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:07,378 INFO L87 Difference]: Start difference. First operand 12541 states and 32944 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:07,605 INFO L93 Difference]: Finished difference Result 14864 states and 37234 transitions. [2021-07-13 19:17:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:17:07,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:07,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:07,629 INFO L225 Difference]: With dead ends: 14864 [2021-07-13 19:17:07,629 INFO L226 Difference]: Without dead ends: 14837 [2021-07-13 19:17:07,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2021-07-13 19:17:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 12541. [2021-07-13 19:17:07,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 12540 states have (on average 2.626874003189793) internal successors, (32941), 12540 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32941 transitions. [2021-07-13 19:17:07,848 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32941 transitions. Word has length 53 [2021-07-13 19:17:07,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:07,848 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32941 transitions. [2021-07-13 19:17:07,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32941 transitions. [2021-07-13 19:17:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:07,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:07,857 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:08,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-07-13 19:17:08,057 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash 259297804, now seen corresponding path program 228 times [2021-07-13 19:17:08,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:08,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824416007] [2021-07-13 19:17:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:08,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:08,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824416007] [2021-07-13 19:17:08,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824416007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797267516] [2021-07-13 19:17:08,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:08,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:17:08,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:08,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:17:08,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:08,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797267516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:08,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:08,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:17:08,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048665445] [2021-07-13 19:17:08,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:08,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:08,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:08,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:08,311 INFO L87 Difference]: Start difference. First operand 12541 states and 32941 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:09,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:09,911 INFO L93 Difference]: Finished difference Result 23524 states and 56000 transitions. [2021-07-13 19:17:09,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-13 19:17:09,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:09,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:09,947 INFO L225 Difference]: With dead ends: 23524 [2021-07-13 19:17:09,947 INFO L226 Difference]: Without dead ends: 23068 [2021-07-13 19:17:09,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3318 ImplicationChecksByTransitivity, 968.1ms TimeCoverageRelationStatistics Valid=807, Invalid=8123, Unknown=0, NotChecked=0, Total=8930 [2021-07-13 19:17:09,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23068 states. [2021-07-13 19:17:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23068 to 13305. [2021-07-13 19:17:10,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13305 states, 13304 states have (on average 2.6126728803367407) internal successors, (34759), 13304 states have internal predecessors, (34759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34759 transitions. [2021-07-13 19:17:10,231 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34759 transitions. Word has length 53 [2021-07-13 19:17:10,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:10,231 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34759 transitions. [2021-07-13 19:17:10,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:10,231 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34759 transitions. [2021-07-13 19:17:10,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:10,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:10,241 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:10,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:10,457 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:10,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:10,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096623, now seen corresponding path program 229 times [2021-07-13 19:17:10,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:10,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153220281] [2021-07-13 19:17:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:10,543 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:10,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:10,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153220281] [2021-07-13 19:17:10,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153220281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240853379] [2021-07-13 19:17:10,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:10,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:10,640 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:10,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240853379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:10,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:10,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:17:10,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619571357] [2021-07-13 19:17:10,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:10,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:10,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:10,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:10,640 INFO L87 Difference]: Start difference. First operand 13305 states and 34759 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:10,902 INFO L93 Difference]: Finished difference Result 15631 states and 39032 transitions. [2021-07-13 19:17:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:10,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:10,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:10,929 INFO L225 Difference]: With dead ends: 15631 [2021-07-13 19:17:10,929 INFO L226 Difference]: Without dead ends: 15595 [2021-07-13 19:17:10,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:10,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15595 states. [2021-07-13 19:17:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15595 to 13305. [2021-07-13 19:17:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13305 states, 13304 states have (on average 2.61244738424534) internal successors, (34756), 13304 states have internal predecessors, (34756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:11,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34756 transitions. [2021-07-13 19:17:11,174 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34756 transitions. Word has length 53 [2021-07-13 19:17:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:11,174 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34756 transitions. [2021-07-13 19:17:11,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34756 transitions. [2021-07-13 19:17:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:11,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:11,184 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:11,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable800 [2021-07-13 19:17:11,385 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:11,385 INFO L82 PathProgramCache]: Analyzing trace with hash 105983938, now seen corresponding path program 230 times [2021-07-13 19:17:11,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:11,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573580913] [2021-07-13 19:17:11,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:11,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:11,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573580913] [2021-07-13 19:17:11,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573580913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915289123] [2021-07-13 19:17:11,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:11,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:11,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:11,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:17:11,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:11,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915289123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:11,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:11,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:17:11,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698657560] [2021-07-13 19:17:11,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:11,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:11,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:11,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:11,593 INFO L87 Difference]: Start difference. First operand 13305 states and 34756 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:14,402 INFO L93 Difference]: Finished difference Result 39717 states and 90677 transitions. [2021-07-13 19:17:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-07-13 19:17:14,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:14,480 INFO L225 Difference]: With dead ends: 39717 [2021-07-13 19:17:14,480 INFO L226 Difference]: Without dead ends: 38331 [2021-07-13 19:17:14,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10453 ImplicationChecksByTransitivity, 2013.2ms TimeCoverageRelationStatistics Valid=1941, Invalid=23181, Unknown=0, NotChecked=0, Total=25122 [2021-07-13 19:17:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38331 states. [2021-07-13 19:17:14,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38331 to 14578. [2021-07-13 19:17:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14577 states have (on average 2.592371544213487) internal successors, (37789), 14577 states have internal predecessors, (37789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37789 transitions. [2021-07-13 19:17:14,897 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37789 transitions. Word has length 53 [2021-07-13 19:17:14,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:14,897 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37789 transitions. [2021-07-13 19:17:14,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,897 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37789 transitions. [2021-07-13 19:17:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:14,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:14,907 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:15,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:15,108 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:15,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:15,108 INFO L82 PathProgramCache]: Analyzing trace with hash 855401591, now seen corresponding path program 231 times [2021-07-13 19:17:15,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:15,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255679732] [2021-07-13 19:17:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:15,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:15,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255679732] [2021-07-13 19:17:15,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255679732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540896333] [2021-07-13 19:17:15,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:15,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:17:15,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:15,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:15,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:15,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540896333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:15,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:17:15,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607856226] [2021-07-13 19:17:15,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:15,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:15,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:15,319 INFO L87 Difference]: Start difference. First operand 14578 states and 37789 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:15,556 INFO L93 Difference]: Finished difference Result 17260 states and 42750 transitions. [2021-07-13 19:17:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:15,557 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:15,581 INFO L225 Difference]: With dead ends: 17260 [2021-07-13 19:17:15,582 INFO L226 Difference]: Without dead ends: 17215 [2021-07-13 19:17:15,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17215 states. [2021-07-13 19:17:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17215 to 14578. [2021-07-13 19:17:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14577 states have (on average 2.5921657405501817) internal successors, (37786), 14577 states have internal predecessors, (37786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:15,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37786 transitions. [2021-07-13 19:17:15,870 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37786 transitions. Word has length 53 [2021-07-13 19:17:15,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:15,870 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37786 transitions. [2021-07-13 19:17:15,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:15,870 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37786 transitions. [2021-07-13 19:17:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:15,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:15,881 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:16,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable807 [2021-07-13 19:17:16,081 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:16,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1717162420, now seen corresponding path program 232 times [2021-07-13 19:17:16,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:16,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369928728] [2021-07-13 19:17:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:16,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:16,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369928728] [2021-07-13 19:17:16,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369928728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:16,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921149221] [2021-07-13 19:17:16,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:16,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:16,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:17:16,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:16,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:17:16,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:17:16,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:16,390 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:17:16,390 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:17:16,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:16,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:17:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:16,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921149221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:16,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:16,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-07-13 19:17:16,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580176493] [2021-07-13 19:17:16,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:17:16,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:16,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:17:16,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:17:16,398 INFO L87 Difference]: Start difference. First operand 14578 states and 37786 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:21,235 INFO L93 Difference]: Finished difference Result 44078 states and 101715 transitions. [2021-07-13 19:17:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-07-13 19:17:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:21,320 INFO L225 Difference]: With dead ends: 44078 [2021-07-13 19:17:21,320 INFO L226 Difference]: Without dead ends: 42758 [2021-07-13 19:17:21,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28740 ImplicationChecksByTransitivity, 3842.0ms TimeCoverageRelationStatistics Valid=4371, Invalid=60399, Unknown=0, NotChecked=0, Total=64770 [2021-07-13 19:17:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42758 states. [2021-07-13 19:17:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42758 to 16260. [2021-07-13 19:17:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16260 states, 16259 states have (on average 2.578448859093425) internal successors, (41923), 16259 states have internal predecessors, (41923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41923 transitions. [2021-07-13 19:17:21,812 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41923 transitions. Word has length 53 [2021-07-13 19:17:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:21,812 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41923 transitions. [2021-07-13 19:17:21,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41923 transitions. [2021-07-13 19:17:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:21,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:21,823 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:22,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:22,024 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:22,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1635323567, now seen corresponding path program 233 times [2021-07-13 19:17:22,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:22,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852687281] [2021-07-13 19:17:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:22,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:22,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852687281] [2021-07-13 19:17:22,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852687281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82559960] [2021-07-13 19:17:22,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:22,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:17:22,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:22,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:22,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82559960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:22,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:22,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2021-07-13 19:17:22,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593859718] [2021-07-13 19:17:22,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:17:22,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:22,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:17:22,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:22,270 INFO L87 Difference]: Start difference. First operand 16260 states and 41923 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:22,629 INFO L93 Difference]: Finished difference Result 19781 states and 48513 transitions. [2021-07-13 19:17:22,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:22,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:22,663 INFO L225 Difference]: With dead ends: 19781 [2021-07-13 19:17:22,663 INFO L226 Difference]: Without dead ends: 19727 [2021-07-13 19:17:22,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:22,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19727 states. [2021-07-13 19:17:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19727 to 16260. [2021-07-13 19:17:22,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16260 states, 16259 states have (on average 2.578264345900732) internal successors, (41920), 16259 states have internal predecessors, (41920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41920 transitions. [2021-07-13 19:17:22,950 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41920 transitions. Word has length 53 [2021-07-13 19:17:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:22,950 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41920 transitions. [2021-07-13 19:17:22,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41920 transitions. [2021-07-13 19:17:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:22,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:22,962 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:23,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-07-13 19:17:23,162 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:23,162 INFO L82 PathProgramCache]: Analyzing trace with hash -913888382, now seen corresponding path program 234 times [2021-07-13 19:17:23,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:23,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730956279] [2021-07-13 19:17:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:23,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:23,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730956279] [2021-07-13 19:17:23,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730956279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894587156] [2021-07-13 19:17:23,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:23,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:17:23,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-13 19:17:23,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:23,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894587156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:23,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:23,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:17:23,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924822048] [2021-07-13 19:17:23,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:23,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:23,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:23,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:23,384 INFO L87 Difference]: Start difference. First operand 16260 states and 41920 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:24,087 INFO L93 Difference]: Finished difference Result 21764 states and 52143 transitions. [2021-07-13 19:17:24,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:17:24,088 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:24,118 INFO L225 Difference]: With dead ends: 21764 [2021-07-13 19:17:24,119 INFO L226 Difference]: Without dead ends: 19982 [2021-07-13 19:17:24,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:17:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19982 states. [2021-07-13 19:17:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19982 to 11673. [2021-07-13 19:17:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11673 states, 11672 states have (on average 2.643762851267992) internal successors, (30858), 11672 states have internal predecessors, (30858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11673 states to 11673 states and 30858 transitions. [2021-07-13 19:17:24,324 INFO L78 Accepts]: Start accepts. Automaton has 11673 states and 30858 transitions. Word has length 53 [2021-07-13 19:17:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:24,325 INFO L482 AbstractCegarLoop]: Abstraction has 11673 states and 30858 transitions. [2021-07-13 19:17:24,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 11673 states and 30858 transitions. [2021-07-13 19:17:24,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:24,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:24,334 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:24,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:24,534 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:24,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1151949899, now seen corresponding path program 109 times [2021-07-13 19:17:24,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:24,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415153677] [2021-07-13 19:17:24,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:24,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415153677] [2021-07-13 19:17:24,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415153677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:24,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79860379] [2021-07-13 19:17:24,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:17:24,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:24,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79860379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:24,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:24,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-07-13 19:17:24,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228810423] [2021-07-13 19:17:24,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:24,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:24,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:24,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:24,710 INFO L87 Difference]: Start difference. First operand 11673 states and 30858 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:24,921 INFO L93 Difference]: Finished difference Result 13241 states and 34204 transitions. [2021-07-13 19:17:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:24,943 INFO L225 Difference]: With dead ends: 13241 [2021-07-13 19:17:24,943 INFO L226 Difference]: Without dead ends: 13227 [2021-07-13 19:17:24,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13227 states. [2021-07-13 19:17:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13227 to 12216. [2021-07-13 19:17:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12216 states, 12215 states have (on average 2.644617273843635) internal successors, (32304), 12215 states have internal predecessors, (32304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 32304 transitions. [2021-07-13 19:17:25,148 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 32304 transitions. Word has length 53 [2021-07-13 19:17:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:25,148 INFO L482 AbstractCegarLoop]: Abstraction has 12216 states and 32304 transitions. [2021-07-13 19:17:25,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 32304 transitions. [2021-07-13 19:17:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:25,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:25,158 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:25,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:25,359 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:25,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1773830309, now seen corresponding path program 110 times [2021-07-13 19:17:25,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:25,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862663776] [2021-07-13 19:17:25,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:25,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862663776] [2021-07-13 19:17:25,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862663776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050821765] [2021-07-13 19:17:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:25,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:25,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:25,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:25,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:25,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050821765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:25,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:25,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-13 19:17:25,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61864178] [2021-07-13 19:17:25,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:25,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:25,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:25,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:25,525 INFO L87 Difference]: Start difference. First operand 12216 states and 32304 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:25,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:25,807 INFO L93 Difference]: Finished difference Result 14309 states and 36490 transitions. [2021-07-13 19:17:25,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:25,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:25,831 INFO L225 Difference]: With dead ends: 14309 [2021-07-13 19:17:25,831 INFO L226 Difference]: Without dead ends: 14309 [2021-07-13 19:17:25,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:25,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14309 states. [2021-07-13 19:17:26,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14309 to 12222. [2021-07-13 19:17:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12222 states, 12221 states have (on average 2.6448735782669175) internal successors, (32323), 12221 states have internal predecessors, (32323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12222 states to 12222 states and 32323 transitions. [2021-07-13 19:17:26,054 INFO L78 Accepts]: Start accepts. Automaton has 12222 states and 32323 transitions. Word has length 53 [2021-07-13 19:17:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:26,054 INFO L482 AbstractCegarLoop]: Abstraction has 12222 states and 32323 transitions. [2021-07-13 19:17:26,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand 12222 states and 32323 transitions. [2021-07-13 19:17:26,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:26,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:26,064 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:26,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:26,264 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:26,264 INFO L82 PathProgramCache]: Analyzing trace with hash 883564531, now seen corresponding path program 111 times [2021-07-13 19:17:26,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:26,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916622958] [2021-07-13 19:17:26,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:26,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:26,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916622958] [2021-07-13 19:17:26,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916622958] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997118912] [2021-07-13 19:17:26,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:26,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:17:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:17:26,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 91 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:26,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997118912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:26,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:26,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-07-13 19:17:26,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92357073] [2021-07-13 19:17:26,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:26,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:26,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:26,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:26,475 INFO L87 Difference]: Start difference. First operand 12222 states and 32323 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:26,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:26,892 INFO L93 Difference]: Finished difference Result 13621 states and 34955 transitions. [2021-07-13 19:17:26,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:17:26,892 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:26,915 INFO L225 Difference]: With dead ends: 13621 [2021-07-13 19:17:26,915 INFO L226 Difference]: Without dead ends: 13621 [2021-07-13 19:17:26,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=324, Invalid=546, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:17:26,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13621 states. [2021-07-13 19:17:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13621 to 12015. [2021-07-13 19:17:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12015 states, 12014 states have (on average 2.647411353421009) internal successors, (31806), 12014 states have internal predecessors, (31806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12015 states to 12015 states and 31806 transitions. [2021-07-13 19:17:27,106 INFO L78 Accepts]: Start accepts. Automaton has 12015 states and 31806 transitions. Word has length 53 [2021-07-13 19:17:27,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:27,107 INFO L482 AbstractCegarLoop]: Abstraction has 12015 states and 31806 transitions. [2021-07-13 19:17:27,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,107 INFO L276 IsEmpty]: Start isEmpty. Operand 12015 states and 31806 transitions. [2021-07-13 19:17:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-13 19:17:27,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:27,116 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:27,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:27,316 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:27,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1321467447, now seen corresponding path program 235 times [2021-07-13 19:17:27,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:27,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123746561] [2021-07-13 19:17:27,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:27,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:27,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123746561] [2021-07-13 19:17:27,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123746561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519546578] [2021-07-13 19:17:27,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:27,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:27,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519546578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:27,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:27,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-13 19:17:27,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119615435] [2021-07-13 19:17:27,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:27,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:27,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:27,539 INFO L87 Difference]: Start difference. First operand 12015 states and 31806 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:27,825 INFO L93 Difference]: Finished difference Result 13804 states and 35062 transitions. [2021-07-13 19:17:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:17:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-13 19:17:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:27,848 INFO L225 Difference]: With dead ends: 13804 [2021-07-13 19:17:27,848 INFO L226 Difference]: Without dead ends: 13739 [2021-07-13 19:17:27,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:17:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-07-13 19:17:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 12024. [2021-07-13 19:17:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12024 states, 12023 states have (on average 2.646594028112784) internal successors, (31820), 12023 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12024 states to 12024 states and 31820 transitions. [2021-07-13 19:17:28,109 INFO L78 Accepts]: Start accepts. Automaton has 12024 states and 31820 transitions. Word has length 53 [2021-07-13 19:17:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:28,109 INFO L482 AbstractCegarLoop]: Abstraction has 12024 states and 31820 transitions. [2021-07-13 19:17:28,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 12024 states and 31820 transitions. [2021-07-13 19:17:28,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:17:28,120 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:28,120 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:28,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-07-13 19:17:28,321 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:28,321 INFO L82 PathProgramCache]: Analyzing trace with hash -278189192, now seen corresponding path program 236 times [2021-07-13 19:17:28,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:28,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039508496] [2021-07-13 19:17:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:28,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:28,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039508496] [2021-07-13 19:17:28,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039508496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363275812] [2021-07-13 19:17:28,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:28,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:28,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:28,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:17:28,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 70 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:28,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363275812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:28,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:28,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2021-07-13 19:17:28,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348071939] [2021-07-13 19:17:28,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:17:28,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:17:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:17:28,722 INFO L87 Difference]: Start difference. First operand 12024 states and 31820 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:30,091 INFO L93 Difference]: Finished difference Result 15072 states and 37802 transitions. [2021-07-13 19:17:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:17:30,091 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:17:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:30,114 INFO L225 Difference]: With dead ends: 15072 [2021-07-13 19:17:30,114 INFO L226 Difference]: Without dead ends: 15028 [2021-07-13 19:17:30,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 785.1ms TimeCoverageRelationStatistics Valid=786, Invalid=3246, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 19:17:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15028 states. [2021-07-13 19:17:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15028 to 12811. [2021-07-13 19:17:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12811 states, 12810 states have (on average 2.609992193598751) internal successors, (33434), 12810 states have internal predecessors, (33434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:30,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12811 states to 12811 states and 33434 transitions. [2021-07-13 19:17:30,349 INFO L78 Accepts]: Start accepts. Automaton has 12811 states and 33434 transitions. Word has length 56 [2021-07-13 19:17:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:30,349 INFO L482 AbstractCegarLoop]: Abstraction has 12811 states and 33434 transitions. [2021-07-13 19:17:30,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:30,350 INFO L276 IsEmpty]: Start isEmpty. Operand 12811 states and 33434 transitions. [2021-07-13 19:17:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:17:30,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:30,360 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:30,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-07-13 19:17:30,560 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:30,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1678028872, now seen corresponding path program 237 times [2021-07-13 19:17:30,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:30,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369768881] [2021-07-13 19:17:30,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:17:30,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:30,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369768881] [2021-07-13 19:17:30,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369768881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:30,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082355341] [2021-07-13 19:17:30,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:30,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:17:30,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:30,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:17:30,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 62 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:30,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082355341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:30,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:30,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-13 19:17:30,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720242831] [2021-07-13 19:17:30,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:17:30,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:30,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:17:30,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:30,831 INFO L87 Difference]: Start difference. First operand 12811 states and 33434 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:31,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:31,756 INFO L93 Difference]: Finished difference Result 16926 states and 41264 transitions. [2021-07-13 19:17:31,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:17:31,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:17:31,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:31,785 INFO L225 Difference]: With dead ends: 16926 [2021-07-13 19:17:31,786 INFO L226 Difference]: Without dead ends: 16834 [2021-07-13 19:17:31,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 387.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:17:31,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16834 states. [2021-07-13 19:17:31,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16834 to 12990. [2021-07-13 19:17:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12990 states, 12989 states have (on average 2.6092847794287475) internal successors, (33892), 12989 states have internal predecessors, (33892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12990 states to 12990 states and 33892 transitions. [2021-07-13 19:17:32,034 INFO L78 Accepts]: Start accepts. Automaton has 12990 states and 33892 transitions. Word has length 56 [2021-07-13 19:17:32,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:32,034 INFO L482 AbstractCegarLoop]: Abstraction has 12990 states and 33892 transitions. [2021-07-13 19:17:32,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,034 INFO L276 IsEmpty]: Start isEmpty. Operand 12990 states and 33892 transitions. [2021-07-13 19:17:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:17:32,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:32,045 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:32,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-07-13 19:17:32,246 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:32,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:32,246 INFO L82 PathProgramCache]: Analyzing trace with hash 173585170, now seen corresponding path program 238 times [2021-07-13 19:17:32,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:32,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295061514] [2021-07-13 19:17:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:17:32,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:32,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295061514] [2021-07-13 19:17:32,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295061514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:32,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397892839] [2021-07-13 19:17:32,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:32,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:32,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:32,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:17:32,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397892839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:32,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:32,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:17:32,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873691603] [2021-07-13 19:17:32,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:32,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:32,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:32,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:32,400 INFO L87 Difference]: Start difference. First operand 12990 states and 33892 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:32,724 INFO L93 Difference]: Finished difference Result 14078 states and 35927 transitions. [2021-07-13 19:17:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:32,725 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:17:32,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:32,749 INFO L225 Difference]: With dead ends: 14078 [2021-07-13 19:17:32,749 INFO L226 Difference]: Without dead ends: 14012 [2021-07-13 19:17:32,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14012 states. [2021-07-13 19:17:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14012 to 13057. [2021-07-13 19:17:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13057 states, 13056 states have (on average 2.604549632352941) internal successors, (34005), 13056 states have internal predecessors, (34005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13057 states to 13057 states and 34005 transitions. [2021-07-13 19:17:32,952 INFO L78 Accepts]: Start accepts. Automaton has 13057 states and 34005 transitions. Word has length 56 [2021-07-13 19:17:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:32,952 INFO L482 AbstractCegarLoop]: Abstraction has 13057 states and 34005 transitions. [2021-07-13 19:17:32,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 13057 states and 34005 transitions. [2021-07-13 19:17:32,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:17:32,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:32,963 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:33,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-07-13 19:17:33,163 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:33,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1342527864, now seen corresponding path program 239 times [2021-07-13 19:17:33,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:33,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589163901] [2021-07-13 19:17:33,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:17:33,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:33,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589163901] [2021-07-13 19:17:33,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589163901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:33,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920698764] [2021-07-13 19:17:33,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:33,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:17:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:33,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:33,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:17:33,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920698764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:33,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:33,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:17:33,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482177411] [2021-07-13 19:17:33,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:33,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:33,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:33,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:33,327 INFO L87 Difference]: Start difference. First operand 13057 states and 34005 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:33,726 INFO L93 Difference]: Finished difference Result 14112 states and 36011 transitions. [2021-07-13 19:17:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:33,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:17:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:33,753 INFO L225 Difference]: With dead ends: 14112 [2021-07-13 19:17:33,753 INFO L226 Difference]: Without dead ends: 14074 [2021-07-13 19:17:33,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:33,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2021-07-13 19:17:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 13111. [2021-07-13 19:17:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13111 states, 13110 states have (on average 2.6011441647597255) internal successors, (34101), 13110 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13111 states to 13111 states and 34101 transitions. [2021-07-13 19:17:33,979 INFO L78 Accepts]: Start accepts. Automaton has 13111 states and 34101 transitions. Word has length 56 [2021-07-13 19:17:33,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:33,980 INFO L482 AbstractCegarLoop]: Abstraction has 13111 states and 34101 transitions. [2021-07-13 19:17:33,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:33,980 INFO L276 IsEmpty]: Start isEmpty. Operand 13111 states and 34101 transitions. [2021-07-13 19:17:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:17:33,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:33,990 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:34,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:34,191 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1719488850, now seen corresponding path program 240 times [2021-07-13 19:17:34,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:34,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504281643] [2021-07-13 19:17:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:17:34,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504281643] [2021-07-13 19:17:34,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504281643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990455801] [2021-07-13 19:17:34,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:34,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 19:17:34,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:34,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:17:34,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:34,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990455801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:34,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:34,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-13 19:17:34,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786851596] [2021-07-13 19:17:34,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:17:34,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:34,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:17:34,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:34,451 INFO L87 Difference]: Start difference. First operand 13111 states and 34101 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:35,401 INFO L93 Difference]: Finished difference Result 18611 states and 44534 transitions. [2021-07-13 19:17:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:17:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:17:35,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:35,440 INFO L225 Difference]: With dead ends: 18611 [2021-07-13 19:17:35,441 INFO L226 Difference]: Without dead ends: 18544 [2021-07-13 19:17:35,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 391.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:17:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18544 states. [2021-07-13 19:17:35,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18544 to 13170. [2021-07-13 19:17:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13170 states, 13169 states have (on average 2.5990583947148607) internal successors, (34227), 13169 states have internal predecessors, (34227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13170 states to 13170 states and 34227 transitions. [2021-07-13 19:17:35,701 INFO L78 Accepts]: Start accepts. Automaton has 13170 states and 34227 transitions. Word has length 56 [2021-07-13 19:17:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:35,701 INFO L482 AbstractCegarLoop]: Abstraction has 13170 states and 34227 transitions. [2021-07-13 19:17:35,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 13170 states and 34227 transitions. [2021-07-13 19:17:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:17:35,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:35,712 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:35,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-07-13 19:17:35,913 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:35,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1774337938, now seen corresponding path program 241 times [2021-07-13 19:17:35,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:35,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089155258] [2021-07-13 19:17:35,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:17:36,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:36,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089155258] [2021-07-13 19:17:36,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089155258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:36,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957509805] [2021-07-13 19:17:36,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:36,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:17:36,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:17:36,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957509805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:36,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:36,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-13 19:17:36,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465728836] [2021-07-13 19:17:36,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:17:36,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:36,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:17:36,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:36,138 INFO L87 Difference]: Start difference. First operand 13170 states and 34227 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:36,458 INFO L93 Difference]: Finished difference Result 14386 states and 36601 transitions. [2021-07-13 19:17:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:17:36,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:17:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:36,483 INFO L225 Difference]: With dead ends: 14386 [2021-07-13 19:17:36,483 INFO L226 Difference]: Without dead ends: 14350 [2021-07-13 19:17:36,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:17:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14350 states. [2021-07-13 19:17:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14350 to 13369. [2021-07-13 19:17:36,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13369 states, 13368 states have (on average 2.590065828845003) internal successors, (34624), 13368 states have internal predecessors, (34624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13369 states to 13369 states and 34624 transitions. [2021-07-13 19:17:36,708 INFO L78 Accepts]: Start accepts. Automaton has 13369 states and 34624 transitions. Word has length 56 [2021-07-13 19:17:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:36,709 INFO L482 AbstractCegarLoop]: Abstraction has 13369 states and 34624 transitions. [2021-07-13 19:17:36,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:36,709 INFO L276 IsEmpty]: Start isEmpty. Operand 13369 states and 34624 transitions. [2021-07-13 19:17:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-13 19:17:36,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:36,720 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:36,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:36,920 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:36,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1948615432, now seen corresponding path program 242 times [2021-07-13 19:17:36,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:36,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626050259] [2021-07-13 19:17:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:17:36,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:36,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626050259] [2021-07-13 19:17:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626050259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:36,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789013380] [2021-07-13 19:17:36,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:37,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:37,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:37,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:17:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 57 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:37,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789013380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:37,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:37,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-13 19:17:37,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957559763] [2021-07-13 19:17:37,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:17:37,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:17:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:37,203 INFO L87 Difference]: Start difference. First operand 13369 states and 34624 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:38,242 INFO L93 Difference]: Finished difference Result 18830 states and 45148 transitions. [2021-07-13 19:17:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-13 19:17:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-13 19:17:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:38,274 INFO L225 Difference]: With dead ends: 18830 [2021-07-13 19:17:38,274 INFO L226 Difference]: Without dead ends: 18792 [2021-07-13 19:17:38,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 433.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:17:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18792 states. [2021-07-13 19:17:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18792 to 14037. [2021-07-13 19:17:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14037 states, 14036 states have (on average 2.5893416927899686) internal successors, (36344), 14036 states have internal predecessors, (36344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14037 states to 14037 states and 36344 transitions. [2021-07-13 19:17:38,592 INFO L78 Accepts]: Start accepts. Automaton has 14037 states and 36344 transitions. Word has length 56 [2021-07-13 19:17:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:38,592 INFO L482 AbstractCegarLoop]: Abstraction has 14037 states and 36344 transitions. [2021-07-13 19:17:38,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 14037 states and 36344 transitions. [2021-07-13 19:17:38,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:38,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:38,604 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:38,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:38,805 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash -848422539, now seen corresponding path program 112 times [2021-07-13 19:17:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:38,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137223284] [2021-07-13 19:17:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:38,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:38,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137223284] [2021-07-13 19:17:38,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137223284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:38,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557175313] [2021-07-13 19:17:38,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:38,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:38,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:17:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:39,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557175313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:39,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:39,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-07-13 19:17:39,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641136855] [2021-07-13 19:17:39,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:17:39,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:39,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:17:39,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:39,076 INFO L87 Difference]: Start difference. First operand 14037 states and 36344 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:40,042 INFO L93 Difference]: Finished difference Result 17404 states and 43003 transitions. [2021-07-13 19:17:40,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:17:40,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:40,068 INFO L225 Difference]: With dead ends: 17404 [2021-07-13 19:17:40,068 INFO L226 Difference]: Without dead ends: 17123 [2021-07-13 19:17:40,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 486.9ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:17:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17123 states. [2021-07-13 19:17:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17123 to 13513. [2021-07-13 19:17:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13513 states, 13512 states have (on average 2.5924363528715215) internal successors, (35029), 13512 states have internal predecessors, (35029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 35029 transitions. [2021-07-13 19:17:40,302 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 35029 transitions. Word has length 59 [2021-07-13 19:17:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:40,302 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 35029 transitions. [2021-07-13 19:17:40,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 35029 transitions. [2021-07-13 19:17:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:40,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:40,314 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:40,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-07-13 19:17:40,514 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:40,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:40,514 INFO L82 PathProgramCache]: Analyzing trace with hash 917417269, now seen corresponding path program 243 times [2021-07-13 19:17:40,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:40,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795620142] [2021-07-13 19:17:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:40,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:40,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795620142] [2021-07-13 19:17:40,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795620142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:40,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103013063] [2021-07-13 19:17:40,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:40,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:17:40,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:17:40,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:41,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103013063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:41,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:41,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-07-13 19:17:41,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343299237] [2021-07-13 19:17:41,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:17:41,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:41,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:17:41,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:17:41,020 INFO L87 Difference]: Start difference. First operand 13513 states and 35029 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:42,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:42,163 INFO L93 Difference]: Finished difference Result 13861 states and 35583 transitions. [2021-07-13 19:17:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:42,163 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:42,187 INFO L225 Difference]: With dead ends: 13861 [2021-07-13 19:17:42,188 INFO L226 Difference]: Without dead ends: 13757 [2021-07-13 19:17:42,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 326.2ms TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:17:42,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13757 states. [2021-07-13 19:17:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13757 to 13513. [2021-07-13 19:17:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13513 states, 13512 states have (on average 2.5887359384251036) internal successors, (34979), 13512 states have internal predecessors, (34979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 34979 transitions. [2021-07-13 19:17:42,398 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 34979 transitions. Word has length 59 [2021-07-13 19:17:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:42,398 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 34979 transitions. [2021-07-13 19:17:42,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 34979 transitions. [2021-07-13 19:17:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:42,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:42,410 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:42,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:42,610 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:42,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1852033535, now seen corresponding path program 244 times [2021-07-13 19:17:42,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:42,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857037846] [2021-07-13 19:17:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:42,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:42,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857037846] [2021-07-13 19:17:42,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857037846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:42,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669283401] [2021-07-13 19:17:42,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:42,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:42,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:42,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:17:42,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:42,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669283401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:42,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:42,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:42,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964315541] [2021-07-13 19:17:42,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:42,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:42,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:42,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:42,804 INFO L87 Difference]: Start difference. First operand 13513 states and 34979 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:43,241 INFO L93 Difference]: Finished difference Result 14176 states and 36253 transitions. [2021-07-13 19:17:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:43,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:43,264 INFO L225 Difference]: With dead ends: 14176 [2021-07-13 19:17:43,264 INFO L226 Difference]: Without dead ends: 14176 [2021-07-13 19:17:43,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2021-07-13 19:17:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 13534. [2021-07-13 19:17:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 2.589448015960984) internal successors, (35043), 13533 states have internal predecessors, (35043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 35043 transitions. [2021-07-13 19:17:43,482 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 35043 transitions. Word has length 59 [2021-07-13 19:17:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:43,482 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 35043 transitions. [2021-07-13 19:17:43,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 35043 transitions. [2021-07-13 19:17:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:43,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:43,494 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:43,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:43,694 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:43,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:43,695 INFO L82 PathProgramCache]: Analyzing trace with hash -267823288, now seen corresponding path program 113 times [2021-07-13 19:17:43,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:43,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052252533] [2021-07-13 19:17:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 102 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:43,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:43,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052252533] [2021-07-13 19:17:43,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052252533] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:43,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705160489] [2021-07-13 19:17:43,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:43,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:17:43,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:43,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:17:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:43,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705160489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:43,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:43,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-13 19:17:43,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340931917] [2021-07-13 19:17:43,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:17:43,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:43,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:17:43,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:43,917 INFO L87 Difference]: Start difference. First operand 13534 states and 35043 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:44,166 INFO L93 Difference]: Finished difference Result 19967 states and 49349 transitions. [2021-07-13 19:17:44,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:17:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:44,196 INFO L225 Difference]: With dead ends: 19967 [2021-07-13 19:17:44,196 INFO L226 Difference]: Without dead ends: 19967 [2021-07-13 19:17:44,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19967 states. [2021-07-13 19:17:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19967 to 14829. [2021-07-13 19:17:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14829 states, 14828 states have (on average 2.625573239816563) internal successors, (38932), 14828 states have internal predecessors, (38932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14829 states to 14829 states and 38932 transitions. [2021-07-13 19:17:44,470 INFO L78 Accepts]: Start accepts. Automaton has 14829 states and 38932 transitions. Word has length 59 [2021-07-13 19:17:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:44,471 INFO L482 AbstractCegarLoop]: Abstraction has 14829 states and 38932 transitions. [2021-07-13 19:17:44,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 14829 states and 38932 transitions. [2021-07-13 19:17:44,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:44,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:44,484 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:44,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable850,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:44,684 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:44,684 INFO L82 PathProgramCache]: Analyzing trace with hash -801688664, now seen corresponding path program 245 times [2021-07-13 19:17:44,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:44,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708953241] [2021-07-13 19:17:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:44,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708953241] [2021-07-13 19:17:44,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708953241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:44,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859371842] [2021-07-13 19:17:44,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:44,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:17:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:17:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:44,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859371842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:44,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:44,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2021-07-13 19:17:44,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895718312] [2021-07-13 19:17:44,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:17:44,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:17:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:17:44,904 INFO L87 Difference]: Start difference. First operand 14829 states and 38932 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:45,245 INFO L93 Difference]: Finished difference Result 15741 states and 40619 transitions. [2021-07-13 19:17:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:45,245 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:45,272 INFO L225 Difference]: With dead ends: 15741 [2021-07-13 19:17:45,273 INFO L226 Difference]: Without dead ends: 15735 [2021-07-13 19:17:45,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:17:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15735 states. [2021-07-13 19:17:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15735 to 14730. [2021-07-13 19:17:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 2.6223776223776225) internal successors, (38625), 14729 states have internal predecessors, (38625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 38625 transitions. [2021-07-13 19:17:45,514 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 38625 transitions. Word has length 59 [2021-07-13 19:17:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:45,514 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 38625 transitions. [2021-07-13 19:17:45,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:45,514 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 38625 transitions. [2021-07-13 19:17:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:45,527 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:45,527 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:45,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-07-13 19:17:45,727 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:45,728 INFO L82 PathProgramCache]: Analyzing trace with hash 925621557, now seen corresponding path program 114 times [2021-07-13 19:17:45,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:45,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586951973] [2021-07-13 19:17:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:45,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:45,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586951973] [2021-07-13 19:17:45,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586951973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:45,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721969776] [2021-07-13 19:17:45,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:45,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:17:45,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:45,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:17:45,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721969776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:45,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:45,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:45,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211319709] [2021-07-13 19:17:45,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:45,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:45,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:45,927 INFO L87 Difference]: Start difference. First operand 14730 states and 38625 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:46,439 INFO L93 Difference]: Finished difference Result 16762 states and 42638 transitions. [2021-07-13 19:17:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:46,439 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:46,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:46,462 INFO L225 Difference]: With dead ends: 16762 [2021-07-13 19:17:46,463 INFO L226 Difference]: Without dead ends: 16710 [2021-07-13 19:17:46,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-07-13 19:17:46,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 14900. [2021-07-13 19:17:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14900 states, 14899 states have (on average 2.6196389019397275) internal successors, (39030), 14899 states have internal predecessors, (39030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14900 states to 14900 states and 39030 transitions. [2021-07-13 19:17:46,707 INFO L78 Accepts]: Start accepts. Automaton has 14900 states and 39030 transitions. Word has length 59 [2021-07-13 19:17:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:46,708 INFO L482 AbstractCegarLoop]: Abstraction has 14900 states and 39030 transitions. [2021-07-13 19:17:46,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:46,708 INFO L276 IsEmpty]: Start isEmpty. Operand 14900 states and 39030 transitions. [2021-07-13 19:17:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:46,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:46,720 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:46,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-07-13 19:17:46,921 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1869012747, now seen corresponding path program 246 times [2021-07-13 19:17:46,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:46,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182747767] [2021-07-13 19:17:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:47,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:47,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182747767] [2021-07-13 19:17:47,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182747767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:47,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119803676] [2021-07-13 19:17:47,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:47,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:17:47,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:47,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:17:47,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:47,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119803676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:47,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:47,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:17:47,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067870711] [2021-07-13 19:17:47,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:47,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:47,125 INFO L87 Difference]: Start difference. First operand 14900 states and 39030 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:47,782 INFO L93 Difference]: Finished difference Result 15921 states and 40869 transitions. [2021-07-13 19:17:47,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:47,810 INFO L225 Difference]: With dead ends: 15921 [2021-07-13 19:17:47,810 INFO L226 Difference]: Without dead ends: 15883 [2021-07-13 19:17:47,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2021-07-13 19:17:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 14906. [2021-07-13 19:17:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14906 states, 14905 states have (on average 2.617309627641731) internal successors, (39011), 14905 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:48,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14906 states to 14906 states and 39011 transitions. [2021-07-13 19:17:48,037 INFO L78 Accepts]: Start accepts. Automaton has 14906 states and 39011 transitions. Word has length 59 [2021-07-13 19:17:48,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:48,037 INFO L482 AbstractCegarLoop]: Abstraction has 14906 states and 39011 transitions. [2021-07-13 19:17:48,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 14906 states and 39011 transitions. [2021-07-13 19:17:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:48,049 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:48,049 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:48,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-07-13 19:17:48,249 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1812418369, now seen corresponding path program 247 times [2021-07-13 19:17:48,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:48,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855978475] [2021-07-13 19:17:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:17:48,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:48,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855978475] [2021-07-13 19:17:48,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855978475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:48,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141071463] [2021-07-13 19:17:48,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:48,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:17:48,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:17:48,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141071463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:48,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:48,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:48,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067600057] [2021-07-13 19:17:48,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:48,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:48,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:48,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:48,464 INFO L87 Difference]: Start difference. First operand 14906 states and 39011 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:49,048 INFO L93 Difference]: Finished difference Result 16341 states and 41812 transitions. [2021-07-13 19:17:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:49,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:49,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:49,072 INFO L225 Difference]: With dead ends: 16341 [2021-07-13 19:17:49,073 INFO L226 Difference]: Without dead ends: 16329 [2021-07-13 19:17:49,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16329 states. [2021-07-13 19:17:49,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16329 to 14918. [2021-07-13 19:17:49,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14918 states, 14917 states have (on average 2.61661191928672) internal successors, (39032), 14917 states have internal predecessors, (39032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14918 states to 14918 states and 39032 transitions. [2021-07-13 19:17:49,315 INFO L78 Accepts]: Start accepts. Automaton has 14918 states and 39032 transitions. Word has length 59 [2021-07-13 19:17:49,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:49,315 INFO L482 AbstractCegarLoop]: Abstraction has 14918 states and 39032 transitions. [2021-07-13 19:17:49,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 14918 states and 39032 transitions. [2021-07-13 19:17:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:49,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:49,328 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:49,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable856 [2021-07-13 19:17:49,529 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:49,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:49,529 INFO L82 PathProgramCache]: Analyzing trace with hash 164060866, now seen corresponding path program 248 times [2021-07-13 19:17:49,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:49,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503355398] [2021-07-13 19:17:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:49,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503355398] [2021-07-13 19:17:49,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503355398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:49,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941478564] [2021-07-13 19:17:49,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:49,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:49,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:17:49,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:49,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941478564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:49,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:49,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:17:49,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272296826] [2021-07-13 19:17:49,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:49,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:49,719 INFO L87 Difference]: Start difference. First operand 14918 states and 39032 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:49,956 INFO L93 Difference]: Finished difference Result 16558 states and 41906 transitions. [2021-07-13 19:17:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:49,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:49,980 INFO L225 Difference]: With dead ends: 16558 [2021-07-13 19:17:49,980 INFO L226 Difference]: Without dead ends: 16534 [2021-07-13 19:17:49,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:49,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2021-07-13 19:17:50,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 14871. [2021-07-13 19:17:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14871 states, 14870 states have (on average 2.6131136516476126) internal successors, (38857), 14870 states have internal predecessors, (38857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14871 states to 14871 states and 38857 transitions. [2021-07-13 19:17:50,216 INFO L78 Accepts]: Start accepts. Automaton has 14871 states and 38857 transitions. Word has length 59 [2021-07-13 19:17:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:50,216 INFO L482 AbstractCegarLoop]: Abstraction has 14871 states and 38857 transitions. [2021-07-13 19:17:50,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 14871 states and 38857 transitions. [2021-07-13 19:17:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:50,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:50,229 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:50,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable857,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:50,430 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash -340631593, now seen corresponding path program 249 times [2021-07-13 19:17:50,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:50,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998132668] [2021-07-13 19:17:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:50,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998132668] [2021-07-13 19:17:50,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998132668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:50,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842499326] [2021-07-13 19:17:50,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:50,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 19:17:50,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:17:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:50,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842499326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:50,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:50,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:17:50,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669250509] [2021-07-13 19:17:50,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:50,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:50,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:50,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:50,653 INFO L87 Difference]: Start difference. First operand 14871 states and 38857 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:51,322 INFO L93 Difference]: Finished difference Result 17148 states and 43479 transitions. [2021-07-13 19:17:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:17:51,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:51,348 INFO L225 Difference]: With dead ends: 17148 [2021-07-13 19:17:51,348 INFO L226 Difference]: Without dead ends: 17136 [2021-07-13 19:17:51,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:17:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17136 states. [2021-07-13 19:17:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17136 to 14915. [2021-07-13 19:17:51,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14915 states, 14914 states have (on average 2.6129140404988602) internal successors, (38969), 14914 states have internal predecessors, (38969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14915 states to 14915 states and 38969 transitions. [2021-07-13 19:17:51,583 INFO L78 Accepts]: Start accepts. Automaton has 14915 states and 38969 transitions. Word has length 59 [2021-07-13 19:17:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:51,583 INFO L482 AbstractCegarLoop]: Abstraction has 14915 states and 38969 transitions. [2021-07-13 19:17:51,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 14915 states and 38969 transitions. [2021-07-13 19:17:51,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:51,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:51,596 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:51,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-07-13 19:17:51,797 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:51,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:51,797 INFO L82 PathProgramCache]: Analyzing trace with hash -578693110, now seen corresponding path program 115 times [2021-07-13 19:17:51,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:51,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363034360] [2021-07-13 19:17:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:51,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:51,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363034360] [2021-07-13 19:17:51,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363034360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:51,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623163385] [2021-07-13 19:17:51,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:51,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:17:51,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:51,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623163385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:51,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:51,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:17:51,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041715146] [2021-07-13 19:17:51,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:51,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:51,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:51,969 INFO L87 Difference]: Start difference. First operand 14915 states and 38969 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:52,178 INFO L93 Difference]: Finished difference Result 19459 states and 48107 transitions. [2021-07-13 19:17:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:52,210 INFO L225 Difference]: With dead ends: 19459 [2021-07-13 19:17:52,210 INFO L226 Difference]: Without dead ends: 19451 [2021-07-13 19:17:52,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2021-07-13 19:17:52,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 15127. [2021-07-13 19:17:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15127 states, 15126 states have (on average 2.619264841993918) internal successors, (39619), 15126 states have internal predecessors, (39619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15127 states to 15127 states and 39619 transitions. [2021-07-13 19:17:52,483 INFO L78 Accepts]: Start accepts. Automaton has 15127 states and 39619 transitions. Word has length 59 [2021-07-13 19:17:52,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:52,483 INFO L482 AbstractCegarLoop]: Abstraction has 15127 states and 39619 transitions. [2021-07-13 19:17:52,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 15127 states and 39619 transitions. [2021-07-13 19:17:52,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:52,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:52,497 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:52,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-07-13 19:17:52,698 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:52,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:52,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1200573520, now seen corresponding path program 116 times [2021-07-13 19:17:52,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:52,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506415603] [2021-07-13 19:17:52,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:17:52,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:52,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506415603] [2021-07-13 19:17:52,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506415603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:52,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604164828] [2021-07-13 19:17:52,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:52,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:52,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:52,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:17:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:52,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604164828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:52,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:52,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:17:52,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999865088] [2021-07-13 19:17:52,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:52,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:52,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:52,882 INFO L87 Difference]: Start difference. First operand 15127 states and 39619 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:53,151 INFO L93 Difference]: Finished difference Result 21539 states and 52894 transitions. [2021-07-13 19:17:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:53,183 INFO L225 Difference]: With dead ends: 21539 [2021-07-13 19:17:53,183 INFO L226 Difference]: Without dead ends: 21539 [2021-07-13 19:17:53,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:53,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21539 states. [2021-07-13 19:17:53,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21539 to 15133. [2021-07-13 19:17:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15133 states, 15132 states have (on average 2.6190192968543484) internal successors, (39631), 15132 states have internal predecessors, (39631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15133 states to 15133 states and 39631 transitions. [2021-07-13 19:17:53,456 INFO L78 Accepts]: Start accepts. Automaton has 15133 states and 39631 transitions. Word has length 59 [2021-07-13 19:17:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:53,456 INFO L482 AbstractCegarLoop]: Abstraction has 15133 states and 39631 transitions. [2021-07-13 19:17:53,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:53,456 INFO L276 IsEmpty]: Start isEmpty. Operand 15133 states and 39631 transitions. [2021-07-13 19:17:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:53,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:53,469 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:53,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:53,669 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:53,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1456821320, now seen corresponding path program 117 times [2021-07-13 19:17:53,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:53,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429758827] [2021-07-13 19:17:53,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:53,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:53,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429758827] [2021-07-13 19:17:53,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429758827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:53,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844250127] [2021-07-13 19:17:53,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:53,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:17:53,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:17:53,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:53,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844250127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:53,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:53,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:17:53,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433086469] [2021-07-13 19:17:53,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:17:53,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:53,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:17:53,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:17:53,867 INFO L87 Difference]: Start difference. First operand 15133 states and 39631 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:54,103 INFO L93 Difference]: Finished difference Result 19875 states and 49164 transitions. [2021-07-13 19:17:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:54,103 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:54,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:54,137 INFO L225 Difference]: With dead ends: 19875 [2021-07-13 19:17:54,138 INFO L226 Difference]: Without dead ends: 19875 [2021-07-13 19:17:54,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19875 states. [2021-07-13 19:17:54,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19875 to 14798. [2021-07-13 19:17:54,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14798 states, 14797 states have (on average 2.6091099547205516) internal successors, (38607), 14797 states have internal predecessors, (38607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38607 transitions. [2021-07-13 19:17:54,413 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38607 transitions. Word has length 59 [2021-07-13 19:17:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:54,413 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38607 transitions. [2021-07-13 19:17:54,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38607 transitions. [2021-07-13 19:17:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:54,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:54,426 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:54,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable864 [2021-07-13 19:17:54,627 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:54,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1191927516, now seen corresponding path program 250 times [2021-07-13 19:17:54,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:54,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834788278] [2021-07-13 19:17:54,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:54,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834788278] [2021-07-13 19:17:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834788278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439695360] [2021-07-13 19:17:54,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:54,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:54,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:54,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:17:54,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:54,822 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:54,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439695360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:54,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:54,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:17:54,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584373530] [2021-07-13 19:17:54,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:17:54,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:54,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:17:54,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:17:54,822 INFO L87 Difference]: Start difference. First operand 14798 states and 38607 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:55,070 INFO L93 Difference]: Finished difference Result 16237 states and 41157 transitions. [2021-07-13 19:17:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:17:55,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:55,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:55,094 INFO L225 Difference]: With dead ends: 16237 [2021-07-13 19:17:55,094 INFO L226 Difference]: Without dead ends: 16219 [2021-07-13 19:17:55,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16219 states. [2021-07-13 19:17:55,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16219 to 14798. [2021-07-13 19:17:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14798 states, 14797 states have (on average 2.608298979522876) internal successors, (38595), 14797 states have internal predecessors, (38595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38595 transitions. [2021-07-13 19:17:55,368 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38595 transitions. Word has length 59 [2021-07-13 19:17:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:55,368 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38595 transitions. [2021-07-13 19:17:55,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38595 transitions. [2021-07-13 19:17:55,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:55,381 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:55,381 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:55,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:55,581 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:55,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:55,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2094564251, now seen corresponding path program 118 times [2021-07-13 19:17:55,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:55,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188933769] [2021-07-13 19:17:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:55,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:55,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188933769] [2021-07-13 19:17:55,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188933769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:55,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218824392] [2021-07-13 19:17:55,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:55,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:17:55,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:55,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:17:55,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:55,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218824392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:55,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:55,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:17:55,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131053156] [2021-07-13 19:17:55,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:55,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:55,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:55,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:55,790 INFO L87 Difference]: Start difference. First operand 14798 states and 38595 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:56,279 INFO L93 Difference]: Finished difference Result 16875 states and 42676 transitions. [2021-07-13 19:17:56,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:56,279 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:56,308 INFO L225 Difference]: With dead ends: 16875 [2021-07-13 19:17:56,308 INFO L226 Difference]: Without dead ends: 16832 [2021-07-13 19:17:56,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16832 states. [2021-07-13 19:17:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16832 to 14910. [2021-07-13 19:17:56,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14910 states, 14909 states have (on average 2.608357368032732) internal successors, (38888), 14909 states have internal predecessors, (38888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14910 states to 14910 states and 38888 transitions. [2021-07-13 19:17:56,550 INFO L78 Accepts]: Start accepts. Automaton has 14910 states and 38888 transitions. Word has length 59 [2021-07-13 19:17:56,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:56,550 INFO L482 AbstractCegarLoop]: Abstraction has 14910 states and 38888 transitions. [2021-07-13 19:17:56,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,551 INFO L276 IsEmpty]: Start isEmpty. Operand 14910 states and 38888 transitions. [2021-07-13 19:17:56,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:56,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:56,564 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:56,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-07-13 19:17:56,764 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:56,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:56,764 INFO L82 PathProgramCache]: Analyzing trace with hash 540867394, now seen corresponding path program 251 times [2021-07-13 19:17:56,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:56,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017880107] [2021-07-13 19:17:56,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:56,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:17:56,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017880107] [2021-07-13 19:17:56,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017880107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:56,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385580504] [2021-07-13 19:17:56,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:56,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:17:56,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:56,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:17:56,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 73 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:17:56,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385580504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:56,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:56,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-07-13 19:17:56,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909408773] [2021-07-13 19:17:56,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:17:56,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:17:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:17:56,955 INFO L87 Difference]: Start difference. First operand 14910 states and 38888 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:57,224 INFO L93 Difference]: Finished difference Result 17259 states and 43116 transitions. [2021-07-13 19:17:57,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:17:57,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:57,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:57,251 INFO L225 Difference]: With dead ends: 17259 [2021-07-13 19:17:57,252 INFO L226 Difference]: Without dead ends: 17256 [2021-07-13 19:17:57,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17256 states. [2021-07-13 19:17:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17256 to 14884. [2021-07-13 19:17:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14884 states, 14883 states have (on average 2.6065309413424713) internal successors, (38793), 14883 states have internal predecessors, (38793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38793 transitions. [2021-07-13 19:17:57,524 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38793 transitions. Word has length 59 [2021-07-13 19:17:57,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:57,524 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38793 transitions. [2021-07-13 19:17:57,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:57,524 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38793 transitions. [2021-07-13 19:17:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:57,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:57,537 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:57,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-07-13 19:17:57,737 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:57,737 INFO L82 PathProgramCache]: Analyzing trace with hash 747929960, now seen corresponding path program 252 times [2021-07-13 19:17:57,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:57,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817179456] [2021-07-13 19:17:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:17:57,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:57,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817179456] [2021-07-13 19:17:57,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817179456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:57,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395602240] [2021-07-13 19:17:57,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:57,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:17:57,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:17:57,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:17:57,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395602240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:57,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:57,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:17:57,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299067508] [2021-07-13 19:17:57,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:57,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:57,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:57,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:57,916 INFO L87 Difference]: Start difference. First operand 14884 states and 38793 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:58,157 INFO L93 Difference]: Finished difference Result 17001 states and 42513 transitions. [2021-07-13 19:17:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:17:58,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:58,186 INFO L225 Difference]: With dead ends: 17001 [2021-07-13 19:17:58,186 INFO L226 Difference]: Without dead ends: 16983 [2021-07-13 19:17:58,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:17:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16983 states. [2021-07-13 19:17:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16983 to 14884. [2021-07-13 19:17:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14884 states, 14883 states have (on average 2.605187126251428) internal successors, (38773), 14883 states have internal predecessors, (38773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38773 transitions. [2021-07-13 19:17:58,447 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38773 transitions. Word has length 59 [2021-07-13 19:17:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:58,447 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38773 transitions. [2021-07-13 19:17:58,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38773 transitions. [2021-07-13 19:17:58,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:58,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:58,461 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:58,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-07-13 19:17:58,661 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:58,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:58,661 INFO L82 PathProgramCache]: Analyzing trace with hash -700070053, now seen corresponding path program 253 times [2021-07-13 19:17:58,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:58,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267899632] [2021-07-13 19:17:58,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:58,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:58,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267899632] [2021-07-13 19:17:58,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267899632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600340514] [2021-07-13 19:17:58,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:58,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:17:58,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:17:58,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600340514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:58,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:17:58,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260150342] [2021-07-13 19:17:58,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:17:58,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:58,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:17:58,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:17:58,858 INFO L87 Difference]: Start difference. First operand 14884 states and 38773 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:59,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:59,535 INFO L93 Difference]: Finished difference Result 16014 states and 40804 transitions. [2021-07-13 19:17:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:17:59,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:17:59,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:59,560 INFO L225 Difference]: With dead ends: 16014 [2021-07-13 19:17:59,561 INFO L226 Difference]: Without dead ends: 15958 [2021-07-13 19:17:59,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 138.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:17:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15958 states. [2021-07-13 19:17:59,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15958 to 14911. [2021-07-13 19:17:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14911 states, 14910 states have (on average 2.602012072434608) internal successors, (38796), 14910 states have internal predecessors, (38796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14911 states to 14911 states and 38796 transitions. [2021-07-13 19:17:59,827 INFO L78 Accepts]: Start accepts. Automaton has 14911 states and 38796 transitions. Word has length 59 [2021-07-13 19:17:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:59,827 INFO L482 AbstractCegarLoop]: Abstraction has 14911 states and 38796 transitions. [2021-07-13 19:17:59,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 14911 states and 38796 transitions. [2021-07-13 19:17:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:17:59,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:59,841 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:00,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable875,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:00,041 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1313606233, now seen corresponding path program 254 times [2021-07-13 19:18:00,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:00,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188881202] [2021-07-13 19:18:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:00,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:00,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:00,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188881202] [2021-07-13 19:18:00,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188881202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631270642] [2021-07-13 19:18:00,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:00,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:00,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:00,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:00,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631270642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:00,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:00,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:18:00,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803935117] [2021-07-13 19:18:00,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:00,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:00,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:00,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:00,237 INFO L87 Difference]: Start difference. First operand 14911 states and 38796 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:00,763 INFO L93 Difference]: Finished difference Result 16567 states and 42026 transitions. [2021-07-13 19:18:00,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:00,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:00,787 INFO L225 Difference]: With dead ends: 16567 [2021-07-13 19:18:00,787 INFO L226 Difference]: Without dead ends: 16555 [2021-07-13 19:18:00,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16555 states. [2021-07-13 19:18:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16555 to 14947. [2021-07-13 19:18:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14947 states, 14946 states have (on average 2.6009634684865515) internal successors, (38874), 14946 states have internal predecessors, (38874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14947 states to 14947 states and 38874 transitions. [2021-07-13 19:18:01,033 INFO L78 Accepts]: Start accepts. Automaton has 14947 states and 38874 transitions. Word has length 59 [2021-07-13 19:18:01,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:01,033 INFO L482 AbstractCegarLoop]: Abstraction has 14947 states and 38874 transitions. [2021-07-13 19:18:01,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:01,033 INFO L276 IsEmpty]: Start isEmpty. Operand 14947 states and 38874 transitions. [2021-07-13 19:18:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:01,046 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:01,046 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:01,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable876 [2021-07-13 19:18:01,247 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:01,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1470905720, now seen corresponding path program 119 times [2021-07-13 19:18:01,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:01,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108395634] [2021-07-13 19:18:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:01,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:01,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108395634] [2021-07-13 19:18:01,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108395634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627392235] [2021-07-13 19:18:01,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:01,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:18:01,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:01,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:01,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:01,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627392235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:01,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:01,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-13 19:18:01,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363737882] [2021-07-13 19:18:01,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:01,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:01,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:01,451 INFO L87 Difference]: Start difference. First operand 14947 states and 38874 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:01,692 INFO L93 Difference]: Finished difference Result 19543 states and 48102 transitions. [2021-07-13 19:18:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:01,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:01,720 INFO L225 Difference]: With dead ends: 19543 [2021-07-13 19:18:01,721 INFO L226 Difference]: Without dead ends: 19523 [2021-07-13 19:18:01,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19523 states. [2021-07-13 19:18:01,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19523 to 15262. [2021-07-13 19:18:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15262 states, 15261 states have (on average 2.6088067623353646) internal successors, (39813), 15261 states have internal predecessors, (39813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15262 states to 15262 states and 39813 transitions. [2021-07-13 19:18:02,019 INFO L78 Accepts]: Start accepts. Automaton has 15262 states and 39813 transitions. Word has length 59 [2021-07-13 19:18:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:02,019 INFO L482 AbstractCegarLoop]: Abstraction has 15262 states and 39813 transitions. [2021-07-13 19:18:02,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,019 INFO L276 IsEmpty]: Start isEmpty. Operand 15262 states and 39813 transitions. [2021-07-13 19:18:02,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:02,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:02,031 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:02,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable877,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:02,232 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash 828311101, now seen corresponding path program 255 times [2021-07-13 19:18:02,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:02,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978526845] [2021-07-13 19:18:02,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:02,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:02,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978526845] [2021-07-13 19:18:02,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978526845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:02,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839692270] [2021-07-13 19:18:02,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:02,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 19:18:02,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:02,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:02,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839692270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:02,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:02,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:02,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892929138] [2021-07-13 19:18:02,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:02,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:02,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:02,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:02,433 INFO L87 Difference]: Start difference. First operand 15262 states and 39813 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:03,109 INFO L93 Difference]: Finished difference Result 18379 states and 46239 transitions. [2021-07-13 19:18:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:18:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:03,138 INFO L225 Difference]: With dead ends: 18379 [2021-07-13 19:18:03,139 INFO L226 Difference]: Without dead ends: 18337 [2021-07-13 19:18:03,139 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:18:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18337 states. [2021-07-13 19:18:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18337 to 15333. [2021-07-13 19:18:03,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15333 states, 15332 states have (on average 2.6092486303156797) internal successors, (40005), 15332 states have internal predecessors, (40005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15333 states to 15333 states and 40005 transitions. [2021-07-13 19:18:03,397 INFO L78 Accepts]: Start accepts. Automaton has 15333 states and 40005 transitions. Word has length 59 [2021-07-13 19:18:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:03,397 INFO L482 AbstractCegarLoop]: Abstraction has 15333 states and 40005 transitions. [2021-07-13 19:18:03,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 15333 states and 40005 transitions. [2021-07-13 19:18:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:03,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:03,410 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:03,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:03,610 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:03,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:03,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1934097086, now seen corresponding path program 256 times [2021-07-13 19:18:03,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:03,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105450172] [2021-07-13 19:18:03,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:03,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:03,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105450172] [2021-07-13 19:18:03,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105450172] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:03,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965995013] [2021-07-13 19:18:03,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:03,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:03,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:03,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:03,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:03,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965995013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:03,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:03,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:18:03,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832762790] [2021-07-13 19:18:03,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:03,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:03,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:03,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:03,786 INFO L87 Difference]: Start difference. First operand 15333 states and 40005 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:04,001 INFO L93 Difference]: Finished difference Result 17426 states and 43666 transitions. [2021-07-13 19:18:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:18:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:04,027 INFO L225 Difference]: With dead ends: 17426 [2021-07-13 19:18:04,028 INFO L226 Difference]: Without dead ends: 17402 [2021-07-13 19:18:04,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17402 states. [2021-07-13 19:18:04,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17402 to 14978. [2021-07-13 19:18:04,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14978 states, 14977 states have (on average 2.6034586365760832) internal successors, (38992), 14977 states have internal predecessors, (38992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14978 states to 14978 states and 38992 transitions. [2021-07-13 19:18:04,308 INFO L78 Accepts]: Start accepts. Automaton has 14978 states and 38992 transitions. Word has length 59 [2021-07-13 19:18:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:04,308 INFO L482 AbstractCegarLoop]: Abstraction has 14978 states and 38992 transitions. [2021-07-13 19:18:04,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 14978 states and 38992 transitions. [2021-07-13 19:18:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:04,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:04,321 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:04,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:04,522 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash 983147635, now seen corresponding path program 257 times [2021-07-13 19:18:04,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:04,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547677981] [2021-07-13 19:18:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:04,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:04,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547677981] [2021-07-13 19:18:04,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547677981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060081515] [2021-07-13 19:18:04,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:04,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:18:04,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:04,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:04,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:04,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060081515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:04,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:04,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:04,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113106457] [2021-07-13 19:18:04,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:04,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:04,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:04,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:04,733 INFO L87 Difference]: Start difference. First operand 14978 states and 38992 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:05,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:05,386 INFO L93 Difference]: Finished difference Result 18584 states and 46418 transitions. [2021-07-13 19:18:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:05,417 INFO L225 Difference]: With dead ends: 18584 [2021-07-13 19:18:05,417 INFO L226 Difference]: Without dead ends: 18530 [2021-07-13 19:18:05,418 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:18:05,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-07-13 19:18:05,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 14933. [2021-07-13 19:18:05,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14933 states, 14932 states have (on average 2.601125100455398) internal successors, (38840), 14932 states have internal predecessors, (38840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14933 states to 14933 states and 38840 transitions. [2021-07-13 19:18:05,682 INFO L78 Accepts]: Start accepts. Automaton has 14933 states and 38840 transitions. Word has length 59 [2021-07-13 19:18:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:05,682 INFO L482 AbstractCegarLoop]: Abstraction has 14933 states and 38840 transitions. [2021-07-13 19:18:05,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 14933 states and 38840 transitions. [2021-07-13 19:18:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:05,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:05,696 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:05,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable885 [2021-07-13 19:18:05,896 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:05,897 INFO L82 PathProgramCache]: Analyzing trace with hash 123205708, now seen corresponding path program 120 times [2021-07-13 19:18:05,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:05,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483057679] [2021-07-13 19:18:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:05,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:05,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483057679] [2021-07-13 19:18:05,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483057679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:05,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330802393] [2021-07-13 19:18:05,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:05,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 19:18:05,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:05,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:05,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:06,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330802393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:06,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:06,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:18:06,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405590490] [2021-07-13 19:18:06,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:06,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:06,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:06,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:06,077 INFO L87 Difference]: Start difference. First operand 14933 states and 38840 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:06,393 INFO L93 Difference]: Finished difference Result 22981 states and 56099 transitions. [2021-07-13 19:18:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:06,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:06,430 INFO L225 Difference]: With dead ends: 22981 [2021-07-13 19:18:06,430 INFO L226 Difference]: Without dead ends: 22981 [2021-07-13 19:18:06,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22981 states. [2021-07-13 19:18:06,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22981 to 15053. [2021-07-13 19:18:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15053 states, 15052 states have (on average 2.6044379484453892) internal successors, (39202), 15052 states have internal predecessors, (39202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:06,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15053 states to 15053 states and 39202 transitions. [2021-07-13 19:18:06,717 INFO L78 Accepts]: Start accepts. Automaton has 15053 states and 39202 transitions. Word has length 59 [2021-07-13 19:18:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:06,717 INFO L482 AbstractCegarLoop]: Abstraction has 15053 states and 39202 transitions. [2021-07-13 19:18:06,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 15053 states and 39202 transitions. [2021-07-13 19:18:06,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:06,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:06,730 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:06,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:06,931 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:06,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:06,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1514366748, now seen corresponding path program 121 times [2021-07-13 19:18:06,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:06,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140972594] [2021-07-13 19:18:06,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:07,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:07,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140972594] [2021-07-13 19:18:07,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140972594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:07,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130166339] [2021-07-13 19:18:07,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:07,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:07,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130166339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:07,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:07,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:18:07,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299779891] [2021-07-13 19:18:07,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:07,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:07,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:07,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:07,134 INFO L87 Difference]: Start difference. First operand 15053 states and 39202 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:07,426 INFO L93 Difference]: Finished difference Result 22759 states and 55530 transitions. [2021-07-13 19:18:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:07,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:07,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:07,463 INFO L225 Difference]: With dead ends: 22759 [2021-07-13 19:18:07,463 INFO L226 Difference]: Without dead ends: 22759 [2021-07-13 19:18:07,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22759 states. [2021-07-13 19:18:07,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22759 to 15073. [2021-07-13 19:18:07,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15073 states, 15072 states have (on average 2.6047638004246285) internal successors, (39259), 15072 states have internal predecessors, (39259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15073 states to 15073 states and 39259 transitions. [2021-07-13 19:18:07,749 INFO L78 Accepts]: Start accepts. Automaton has 15073 states and 39259 transitions. Word has length 59 [2021-07-13 19:18:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:07,749 INFO L482 AbstractCegarLoop]: Abstraction has 15073 states and 39259 transitions. [2021-07-13 19:18:07,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 15073 states and 39259 transitions. [2021-07-13 19:18:07,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:07,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:07,762 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:07,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-07-13 19:18:07,963 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:07,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1090605384, now seen corresponding path program 122 times [2021-07-13 19:18:07,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:07,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097014166] [2021-07-13 19:18:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:08,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097014166] [2021-07-13 19:18:08,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097014166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201813199] [2021-07-13 19:18:08,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:08,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:08,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:08,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201813199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:08,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:08,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:18:08,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057479529] [2021-07-13 19:18:08,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:08,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:08,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:08,158 INFO L87 Difference]: Start difference. First operand 15073 states and 39259 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:08,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:08,494 INFO L93 Difference]: Finished difference Result 19776 states and 48785 transitions. [2021-07-13 19:18:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:08,494 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:08,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:08,524 INFO L225 Difference]: With dead ends: 19776 [2021-07-13 19:18:08,524 INFO L226 Difference]: Without dead ends: 19776 [2021-07-13 19:18:08,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:08,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19776 states. [2021-07-13 19:18:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19776 to 14764. [2021-07-13 19:18:08,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14764 states, 14763 states have (on average 2.5980491769965455) internal successors, (38355), 14763 states have internal predecessors, (38355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:08,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38355 transitions. [2021-07-13 19:18:08,795 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38355 transitions. Word has length 59 [2021-07-13 19:18:08,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:08,795 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38355 transitions. [2021-07-13 19:18:08,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:08,796 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38355 transitions. [2021-07-13 19:18:08,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:08,809 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:08,809 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:09,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-07-13 19:18:09,010 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:09,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:09,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1369750312, now seen corresponding path program 258 times [2021-07-13 19:18:09,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:09,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85630636] [2021-07-13 19:18:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:09,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:09,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85630636] [2021-07-13 19:18:09,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85630636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:09,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116973342] [2021-07-13 19:18:09,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:09,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 19:18:09,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:09,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:09,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:09,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116973342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:09,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:09,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:18:09,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198503192] [2021-07-13 19:18:09,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:09,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:09,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:09,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:09,199 INFO L87 Difference]: Start difference. First operand 14764 states and 38355 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:09,426 INFO L93 Difference]: Finished difference Result 16631 states and 41638 transitions. [2021-07-13 19:18:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:09,451 INFO L225 Difference]: With dead ends: 16631 [2021-07-13 19:18:09,451 INFO L226 Difference]: Without dead ends: 16604 [2021-07-13 19:18:09,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16604 states. [2021-07-13 19:18:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16604 to 14764. [2021-07-13 19:18:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14764 states, 14763 states have (on average 2.597439544807966) internal successors, (38346), 14763 states have internal predecessors, (38346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38346 transitions. [2021-07-13 19:18:09,690 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38346 transitions. Word has length 59 [2021-07-13 19:18:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:09,690 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38346 transitions. [2021-07-13 19:18:09,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38346 transitions. [2021-07-13 19:18:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:09,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:09,703 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:09,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-07-13 19:18:09,904 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1823442059, now seen corresponding path program 123 times [2021-07-13 19:18:09,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:09,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117728394] [2021-07-13 19:18:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:09,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:09,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117728394] [2021-07-13 19:18:09,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117728394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:09,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456118730] [2021-07-13 19:18:09,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:10,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 19:18:10,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:10,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:10,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:10,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456118730] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:10,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:10,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:18:10,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518382958] [2021-07-13 19:18:10,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:10,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:10,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:10,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:10,105 INFO L87 Difference]: Start difference. First operand 14764 states and 38346 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:10,615 INFO L93 Difference]: Finished difference Result 16764 states and 42302 transitions. [2021-07-13 19:18:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:10,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:10,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:10,692 INFO L225 Difference]: With dead ends: 16764 [2021-07-13 19:18:10,692 INFO L226 Difference]: Without dead ends: 16726 [2021-07-13 19:18:10,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 139.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16726 states. [2021-07-13 19:18:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16726 to 14878. [2021-07-13 19:18:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14878 states, 14877 states have (on average 2.597297842306917) internal successors, (38640), 14877 states have internal predecessors, (38640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:10,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14878 states to 14878 states and 38640 transitions. [2021-07-13 19:18:10,925 INFO L78 Accepts]: Start accepts. Automaton has 14878 states and 38640 transitions. Word has length 59 [2021-07-13 19:18:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:10,925 INFO L482 AbstractCegarLoop]: Abstraction has 14878 states and 38640 transitions. [2021-07-13 19:18:10,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:10,926 INFO L276 IsEmpty]: Start isEmpty. Operand 14878 states and 38640 transitions. [2021-07-13 19:18:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:10,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:10,939 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:11,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-07-13 19:18:11,139 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:11,139 INFO L82 PathProgramCache]: Analyzing trace with hash 917828380, now seen corresponding path program 259 times [2021-07-13 19:18:11,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:11,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248978564] [2021-07-13 19:18:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:11,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:11,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248978564] [2021-07-13 19:18:11,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248978564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:11,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221790992] [2021-07-13 19:18:11,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:11,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:11,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:11,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221790992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:11,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:11,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:18:11,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95542517] [2021-07-13 19:18:11,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:18:11,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:11,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:18:11,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:18:11,297 INFO L87 Difference]: Start difference. First operand 14878 states and 38640 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:11,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:11,488 INFO L93 Difference]: Finished difference Result 17271 states and 42891 transitions. [2021-07-13 19:18:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:18:11,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:11,515 INFO L225 Difference]: With dead ends: 17271 [2021-07-13 19:18:11,516 INFO L226 Difference]: Without dead ends: 17268 [2021-07-13 19:18:11,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17268 states. [2021-07-13 19:18:11,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17268 to 14858. [2021-07-13 19:18:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 2.5956114962643873) internal successors, (38563), 14857 states have internal predecessors, (38563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38563 transitions. [2021-07-13 19:18:11,767 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38563 transitions. Word has length 59 [2021-07-13 19:18:11,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:11,767 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38563 transitions. [2021-07-13 19:18:11,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38563 transitions. [2021-07-13 19:18:11,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:11,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:11,779 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:11,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-07-13 19:18:11,980 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:11,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1124890946, now seen corresponding path program 260 times [2021-07-13 19:18:11,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:11,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765291451] [2021-07-13 19:18:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:12,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:12,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765291451] [2021-07-13 19:18:12,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765291451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:12,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839026135] [2021-07-13 19:18:12,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:12,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:12,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:12,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:12,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839026135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:12,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:12,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:18:12,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130427186] [2021-07-13 19:18:12,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:12,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:12,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:12,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:12,145 INFO L87 Difference]: Start difference. First operand 14858 states and 38563 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:12,344 INFO L93 Difference]: Finished difference Result 17287 states and 42863 transitions. [2021-07-13 19:18:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:18:12,344 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:12,370 INFO L225 Difference]: With dead ends: 17287 [2021-07-13 19:18:12,371 INFO L226 Difference]: Without dead ends: 17269 [2021-07-13 19:18:12,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:12,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-07-13 19:18:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 14858. [2021-07-13 19:18:12,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 2.593996096116309) internal successors, (38539), 14857 states have internal predecessors, (38539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:12,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38539 transitions. [2021-07-13 19:18:12,651 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38539 transitions. Word has length 59 [2021-07-13 19:18:12,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:12,651 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38539 transitions. [2021-07-13 19:18:12,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38539 transitions. [2021-07-13 19:18:12,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:12,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:12,664 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:12,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:12,864 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:12,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash -323109067, now seen corresponding path program 261 times [2021-07-13 19:18:12,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:12,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586746763] [2021-07-13 19:18:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:12,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:12,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586746763] [2021-07-13 19:18:12,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586746763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:12,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910284782] [2021-07-13 19:18:12,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:12,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 19:18:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:13,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910284782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:13,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:13,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:18:13,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476395060] [2021-07-13 19:18:13,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:13,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:13,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:13,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:13,068 INFO L87 Difference]: Start difference. First operand 14858 states and 38539 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:13,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:13,739 INFO L93 Difference]: Finished difference Result 15989 states and 40590 transitions. [2021-07-13 19:18:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:13,740 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:13,764 INFO L225 Difference]: With dead ends: 15989 [2021-07-13 19:18:13,764 INFO L226 Difference]: Without dead ends: 15915 [2021-07-13 19:18:13,765 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15915 states. [2021-07-13 19:18:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15915 to 14924. [2021-07-13 19:18:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14924 states, 14923 states have (on average 2.588956644106413) internal successors, (38635), 14923 states have internal predecessors, (38635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14924 states to 14924 states and 38635 transitions. [2021-07-13 19:18:14,006 INFO L78 Accepts]: Start accepts. Automaton has 14924 states and 38635 transitions. Word has length 59 [2021-07-13 19:18:14,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:14,006 INFO L482 AbstractCegarLoop]: Abstraction has 14924 states and 38635 transitions. [2021-07-13 19:18:14,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 14924 states and 38635 transitions. [2021-07-13 19:18:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:14,018 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:14,018 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:14,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:14,219 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:14,219 INFO L82 PathProgramCache]: Analyzing trace with hash -936645247, now seen corresponding path program 262 times [2021-07-13 19:18:14,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:14,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80313401] [2021-07-13 19:18:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:14,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:14,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:14,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80313401] [2021-07-13 19:18:14,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80313401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:14,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439901080] [2021-07-13 19:18:14,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:14,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:14,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:14,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:14,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439901080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:14,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:14,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:18:14,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897471881] [2021-07-13 19:18:14,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:14,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:14,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:14,427 INFO L87 Difference]: Start difference. First operand 14924 states and 38635 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:14,976 INFO L93 Difference]: Finished difference Result 16650 states and 42030 transitions. [2021-07-13 19:18:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:15,003 INFO L225 Difference]: With dead ends: 16650 [2021-07-13 19:18:15,003 INFO L226 Difference]: Without dead ends: 16638 [2021-07-13 19:18:15,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16638 states. [2021-07-13 19:18:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16638 to 14998. [2021-07-13 19:18:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14998 states, 14997 states have (on average 2.587784223511369) internal successors, (38809), 14997 states have internal predecessors, (38809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14998 states to 14998 states and 38809 transitions. [2021-07-13 19:18:15,270 INFO L78 Accepts]: Start accepts. Automaton has 14998 states and 38809 transitions. Word has length 59 [2021-07-13 19:18:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:15,270 INFO L482 AbstractCegarLoop]: Abstraction has 14998 states and 38809 transitions. [2021-07-13 19:18:15,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 14998 states and 38809 transitions. [2021-07-13 19:18:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:15,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:15,283 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:15,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:15,483 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:15,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1205272087, now seen corresponding path program 263 times [2021-07-13 19:18:15,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:15,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815657901] [2021-07-13 19:18:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:15,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:15,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815657901] [2021-07-13 19:18:15,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815657901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:15,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552126884] [2021-07-13 19:18:15,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:15,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:18:15,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:15,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:15,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:15,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552126884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:15,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:15,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:15,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968801435] [2021-07-13 19:18:15,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:15,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:15,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:15,682 INFO L87 Difference]: Start difference. First operand 14998 states and 38809 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:16,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:16,333 INFO L93 Difference]: Finished difference Result 18719 states and 46626 transitions. [2021-07-13 19:18:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:18:16,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:16,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:16,365 INFO L225 Difference]: With dead ends: 18719 [2021-07-13 19:18:16,365 INFO L226 Difference]: Without dead ends: 18665 [2021-07-13 19:18:16,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:18:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18665 states. [2021-07-13 19:18:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18665 to 15200. [2021-07-13 19:18:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15200 states, 15199 states have (on average 2.5887887361010593) internal successors, (39347), 15199 states have internal predecessors, (39347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39347 transitions. [2021-07-13 19:18:16,652 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39347 transitions. Word has length 59 [2021-07-13 19:18:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:16,652 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39347 transitions. [2021-07-13 19:18:16,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39347 transitions. [2021-07-13 19:18:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:16,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:16,665 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:16,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:16,865 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:16,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1557136100, now seen corresponding path program 264 times [2021-07-13 19:18:16,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:16,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981384877] [2021-07-13 19:18:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:16,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:16,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981384877] [2021-07-13 19:18:16,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981384877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:16,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498175538] [2021-07-13 19:18:16,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:16,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:18:16,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:16,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:17,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498175538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:17,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:17,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:18:17,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703309353] [2021-07-13 19:18:17,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:17,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:17,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:17,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:17,045 INFO L87 Difference]: Start difference. First operand 15200 states and 39347 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:17,260 INFO L93 Difference]: Finished difference Result 17641 states and 43655 transitions. [2021-07-13 19:18:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:18:17,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:17,343 INFO L225 Difference]: With dead ends: 17641 [2021-07-13 19:18:17,343 INFO L226 Difference]: Without dead ends: 17617 [2021-07-13 19:18:17,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17617 states. [2021-07-13 19:18:17,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17617 to 15200. [2021-07-13 19:18:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15200 states, 15199 states have (on average 2.587670241463254) internal successors, (39330), 15199 states have internal predecessors, (39330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:17,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39330 transitions. [2021-07-13 19:18:17,572 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39330 transitions. Word has length 59 [2021-07-13 19:18:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:17,572 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39330 transitions. [2021-07-13 19:18:17,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:17,572 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39330 transitions. [2021-07-13 19:18:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:17,585 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:17,585 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:17,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-07-13 19:18:17,786 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1360108621, now seen corresponding path program 265 times [2021-07-13 19:18:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:17,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106353152] [2021-07-13 19:18:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:17,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:17,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106353152] [2021-07-13 19:18:17,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106353152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:17,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130279879] [2021-07-13 19:18:17,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:17,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130279879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:17,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:17,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:17,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005247587] [2021-07-13 19:18:17,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:17,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:17,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:17,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:17,999 INFO L87 Difference]: Start difference. First operand 15200 states and 39330 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:18,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:18,896 INFO L93 Difference]: Finished difference Result 21862 states and 53696 transitions. [2021-07-13 19:18:18,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:18:18,897 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:18,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:18,932 INFO L225 Difference]: With dead ends: 21862 [2021-07-13 19:18:18,932 INFO L226 Difference]: Without dead ends: 21748 [2021-07-13 19:18:18,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 332.0ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:18:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21748 states. [2021-07-13 19:18:19,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21748 to 15415. [2021-07-13 19:18:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15415 states, 15414 states have (on average 2.589139743090697) internal successors, (39909), 15414 states have internal predecessors, (39909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15415 states to 15415 states and 39909 transitions. [2021-07-13 19:18:19,221 INFO L78 Accepts]: Start accepts. Automaton has 15415 states and 39909 transitions. Word has length 59 [2021-07-13 19:18:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:19,221 INFO L482 AbstractCegarLoop]: Abstraction has 15415 states and 39909 transitions. [2021-07-13 19:18:19,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 15415 states and 39909 transitions. [2021-07-13 19:18:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:19,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:19,234 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:19,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:19,434 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:19,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1746711298, now seen corresponding path program 266 times [2021-07-13 19:18:19,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:19,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283291257] [2021-07-13 19:18:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:19,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:19,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283291257] [2021-07-13 19:18:19,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283291257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:19,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421748141] [2021-07-13 19:18:19,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:19,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:19,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:19,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:19,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:19,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421748141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:19,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:19,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:18:19,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634443574] [2021-07-13 19:18:19,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:19,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:19,689 INFO L87 Difference]: Start difference. First operand 15415 states and 39909 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:19,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:19,948 INFO L93 Difference]: Finished difference Result 17893 states and 44283 transitions. [2021-07-13 19:18:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:19,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:19,975 INFO L225 Difference]: With dead ends: 17893 [2021-07-13 19:18:19,975 INFO L226 Difference]: Without dead ends: 17860 [2021-07-13 19:18:19,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17860 states. [2021-07-13 19:18:20,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17860 to 15072. [2021-07-13 19:18:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15072 states, 15071 states have (on average 2.5837038020038485) internal successors, (38939), 15071 states have internal predecessors, (38939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:20,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15072 states to 15072 states and 38939 transitions. [2021-07-13 19:18:20,221 INFO L78 Accepts]: Start accepts. Automaton has 15072 states and 38939 transitions. Word has length 59 [2021-07-13 19:18:20,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:20,221 INFO L482 AbstractCegarLoop]: Abstraction has 15072 states and 38939 transitions. [2021-07-13 19:18:20,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 15072 states and 38939 transitions. [2021-07-13 19:18:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:20,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:20,235 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:20,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable908,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:20,435 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1300417111, now seen corresponding path program 267 times [2021-07-13 19:18:20,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:20,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773539889] [2021-07-13 19:18:20,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:20,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:20,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773539889] [2021-07-13 19:18:20,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773539889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:20,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66789465] [2021-07-13 19:18:20,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:20,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-13 19:18:20,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:20,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66789465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:20,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:20,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:20,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405361253] [2021-07-13 19:18:20,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:20,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:20,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:20,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:20,661 INFO L87 Difference]: Start difference. First operand 15072 states and 38939 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:21,380 INFO L93 Difference]: Finished difference Result 20407 states and 50176 transitions. [2021-07-13 19:18:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:18:21,380 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:21,413 INFO L225 Difference]: With dead ends: 20407 [2021-07-13 19:18:21,413 INFO L226 Difference]: Without dead ends: 20251 [2021-07-13 19:18:21,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:18:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20251 states. [2021-07-13 19:18:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20251 to 14617. [2021-07-13 19:18:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14617 states, 14616 states have (on average 2.5764915161466884) internal successors, (37658), 14616 states have internal predecessors, (37658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14617 states to 14617 states and 37658 transitions. [2021-07-13 19:18:21,741 INFO L78 Accepts]: Start accepts. Automaton has 14617 states and 37658 transitions. Word has length 59 [2021-07-13 19:18:21,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:21,741 INFO L482 AbstractCegarLoop]: Abstraction has 14617 states and 37658 transitions. [2021-07-13 19:18:21,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand 14617 states and 37658 transitions. [2021-07-13 19:18:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:21,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:21,754 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:21,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-07-13 19:18:21,954 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:21,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:21,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1062355594, now seen corresponding path program 124 times [2021-07-13 19:18:21,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:21,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914217136] [2021-07-13 19:18:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:22,034 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:22,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:22,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914217136] [2021-07-13 19:18:22,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914217136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:22,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965023556] [2021-07-13 19:18:22,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:22,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:22,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:22,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:22,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965023556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:22,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:22,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:18:22,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813177209] [2021-07-13 19:18:22,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:22,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:22,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:22,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:22,154 INFO L87 Difference]: Start difference. First operand 14617 states and 37658 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:22,378 INFO L93 Difference]: Finished difference Result 18811 states and 46226 transitions. [2021-07-13 19:18:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:22,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:22,409 INFO L225 Difference]: With dead ends: 18811 [2021-07-13 19:18:22,409 INFO L226 Difference]: Without dead ends: 18797 [2021-07-13 19:18:22,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:22,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18797 states. [2021-07-13 19:18:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18797 to 14958. [2021-07-13 19:18:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14958 states, 14957 states have (on average 2.5815337300260746) internal successors, (38612), 14957 states have internal predecessors, (38612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:22,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14958 states to 14958 states and 38612 transitions. [2021-07-13 19:18:22,683 INFO L78 Accepts]: Start accepts. Automaton has 14958 states and 38612 transitions. Word has length 59 [2021-07-13 19:18:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:22,683 INFO L482 AbstractCegarLoop]: Abstraction has 14958 states and 38612 transitions. [2021-07-13 19:18:22,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:22,683 INFO L276 IsEmpty]: Start isEmpty. Operand 14958 states and 38612 transitions. [2021-07-13 19:18:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:22,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:22,696 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:22,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:22,897 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash 440475184, now seen corresponding path program 125 times [2021-07-13 19:18:22,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:22,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412058584] [2021-07-13 19:18:22,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:22,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:22,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412058584] [2021-07-13 19:18:22,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412058584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:22,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515192929] [2021-07-13 19:18:22,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:22,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:18:22,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:22,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:22,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:23,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515192929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:23,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:23,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-13 19:18:23,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581513426] [2021-07-13 19:18:23,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:23,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:23,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:23,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:23,090 INFO L87 Difference]: Start difference. First operand 14958 states and 38612 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:23,361 INFO L93 Difference]: Finished difference Result 23655 states and 57376 transitions. [2021-07-13 19:18:23,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:23,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:23,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:23,397 INFO L225 Difference]: With dead ends: 23655 [2021-07-13 19:18:23,398 INFO L226 Difference]: Without dead ends: 23655 [2021-07-13 19:18:23,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:23,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23655 states. [2021-07-13 19:18:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23655 to 14973. [2021-07-13 19:18:23,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14973 states, 14972 states have (on average 2.5819529788939355) internal successors, (38657), 14972 states have internal predecessors, (38657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14973 states to 14973 states and 38657 transitions. [2021-07-13 19:18:23,765 INFO L78 Accepts]: Start accepts. Automaton has 14973 states and 38657 transitions. Word has length 59 [2021-07-13 19:18:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:23,765 INFO L482 AbstractCegarLoop]: Abstraction has 14973 states and 38657 transitions. [2021-07-13 19:18:23,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:23,765 INFO L276 IsEmpty]: Start isEmpty. Operand 14973 states and 38657 transitions. [2021-07-13 19:18:23,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:23,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:23,777 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:23,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:23,978 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:23,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1197097272, now seen corresponding path program 126 times [2021-07-13 19:18:23,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:23,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227820399] [2021-07-13 19:18:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 131 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:24,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:24,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227820399] [2021-07-13 19:18:24,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227820399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:24,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425262232] [2021-07-13 19:18:24,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:24,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 19:18:24,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:24,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:24,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 132 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:24,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425262232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:24,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:24,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:18:24,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683954167] [2021-07-13 19:18:24,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:24,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:24,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:24,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:24,172 INFO L87 Difference]: Start difference. First operand 14973 states and 38657 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:24,487 INFO L93 Difference]: Finished difference Result 24867 states and 60280 transitions. [2021-07-13 19:18:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:24,487 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:24,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:24,529 INFO L225 Difference]: With dead ends: 24867 [2021-07-13 19:18:24,529 INFO L226 Difference]: Without dead ends: 24867 [2021-07-13 19:18:24,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:18:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-07-13 19:18:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 15014. [2021-07-13 19:18:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15014 states, 15013 states have (on average 2.5834276959968028) internal successors, (38785), 15013 states have internal predecessors, (38785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15014 states to 15014 states and 38785 transitions. [2021-07-13 19:18:24,830 INFO L78 Accepts]: Start accepts. Automaton has 15014 states and 38785 transitions. Word has length 59 [2021-07-13 19:18:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:24,830 INFO L482 AbstractCegarLoop]: Abstraction has 15014 states and 38785 transitions. [2021-07-13 19:18:24,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:24,830 INFO L276 IsEmpty]: Start isEmpty. Operand 15014 states and 38785 transitions. [2021-07-13 19:18:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:24,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:24,843 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:25,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:25,043 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:25,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1407874860, now seen corresponding path program 127 times [2021-07-13 19:18:25,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:25,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145541982] [2021-07-13 19:18:25,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 118 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:25,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:25,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145541982] [2021-07-13 19:18:25,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145541982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:25,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633907184] [2021-07-13 19:18:25,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:25,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 119 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:25,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633907184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:25,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:25,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:18:25,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786757643] [2021-07-13 19:18:25,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:25,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:25,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:25,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:25,238 INFO L87 Difference]: Start difference. First operand 15014 states and 38785 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:25,570 INFO L93 Difference]: Finished difference Result 23075 states and 56081 transitions. [2021-07-13 19:18:25,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:25,607 INFO L225 Difference]: With dead ends: 23075 [2021-07-13 19:18:25,608 INFO L226 Difference]: Without dead ends: 23075 [2021-07-13 19:18:25,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:18:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23075 states. [2021-07-13 19:18:25,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23075 to 15042. [2021-07-13 19:18:25,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15042 states, 15041 states have (on average 2.5839372382155443) internal successors, (38865), 15041 states have internal predecessors, (38865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 38865 transitions. [2021-07-13 19:18:25,919 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 38865 transitions. Word has length 59 [2021-07-13 19:18:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:25,919 INFO L482 AbstractCegarLoop]: Abstraction has 15042 states and 38865 transitions. [2021-07-13 19:18:25,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 38865 transitions. [2021-07-13 19:18:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:25,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:25,932 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:26,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable918 [2021-07-13 19:18:26,133 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:26,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:26,133 INFO L82 PathProgramCache]: Analyzing trace with hash 368587848, now seen corresponding path program 128 times [2021-07-13 19:18:26,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:26,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452940906] [2021-07-13 19:18:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:26,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:26,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452940906] [2021-07-13 19:18:26,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452940906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:26,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136551349] [2021-07-13 19:18:26,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:26,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:26,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:26,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:26,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:26,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136551349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:26,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:26,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:18:26,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786726665] [2021-07-13 19:18:26,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:26,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:26,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:26,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:26,363 INFO L87 Difference]: Start difference. First operand 15042 states and 38865 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:26,676 INFO L93 Difference]: Finished difference Result 19432 states and 47841 transitions. [2021-07-13 19:18:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:26,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:26,708 INFO L225 Difference]: With dead ends: 19432 [2021-07-13 19:18:26,708 INFO L226 Difference]: Without dead ends: 19432 [2021-07-13 19:18:26,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:18:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19432 states. [2021-07-13 19:18:26,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19432 to 14656. [2021-07-13 19:18:26,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14656 states, 14655 states have (on average 2.5765950187649267) internal successors, (37760), 14655 states have internal predecessors, (37760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:26,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37760 transitions. [2021-07-13 19:18:26,952 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37760 transitions. Word has length 59 [2021-07-13 19:18:26,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:26,952 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37760 transitions. [2021-07-13 19:18:26,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:26,952 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37760 transitions. [2021-07-13 19:18:26,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:26,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:26,964 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:27,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-07-13 19:18:27,165 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1100977316, now seen corresponding path program 268 times [2021-07-13 19:18:27,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:27,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82192100] [2021-07-13 19:18:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:27,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:27,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82192100] [2021-07-13 19:18:27,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82192100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:27,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906357366] [2021-07-13 19:18:27,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:27,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:27,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:27,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:27,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:27,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906357366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:27,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:27,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:18:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940416907] [2021-07-13 19:18:27,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:27,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:27,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:27,370 INFO L87 Difference]: Start difference. First operand 14656 states and 37760 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:27,613 INFO L93 Difference]: Finished difference Result 16822 states and 41592 transitions. [2021-07-13 19:18:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:27,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:27,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:27,638 INFO L225 Difference]: With dead ends: 16822 [2021-07-13 19:18:27,638 INFO L226 Difference]: Without dead ends: 16786 [2021-07-13 19:18:27,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:27,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16786 states. [2021-07-13 19:18:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16786 to 14656. [2021-07-13 19:18:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14656 states, 14655 states have (on average 2.5757761856021837) internal successors, (37748), 14655 states have internal predecessors, (37748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37748 transitions. [2021-07-13 19:18:27,937 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37748 transitions. Word has length 59 [2021-07-13 19:18:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:27,937 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37748 transitions. [2021-07-13 19:18:27,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:27,937 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37748 transitions. [2021-07-13 19:18:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:27,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:27,951 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:28,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-07-13 19:18:28,151 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:28,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:28,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1176780123, now seen corresponding path program 129 times [2021-07-13 19:18:28,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:28,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928311751] [2021-07-13 19:18:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:28,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:28,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928311751] [2021-07-13 19:18:28,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928311751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:28,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724053179] [2021-07-13 19:18:28,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:28,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-13 19:18:28,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:28,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:28,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:28,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724053179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:28,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:28,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:18:28,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397556611] [2021-07-13 19:18:28,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:28,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:28,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:28,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:28,371 INFO L87 Difference]: Start difference. First operand 14656 states and 37748 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:28,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:28,907 INFO L93 Difference]: Finished difference Result 16512 states and 41427 transitions. [2021-07-13 19:18:28,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:28,907 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:28,931 INFO L225 Difference]: With dead ends: 16512 [2021-07-13 19:18:28,931 INFO L226 Difference]: Without dead ends: 16481 [2021-07-13 19:18:28,931 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:28,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16481 states. [2021-07-13 19:18:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16481 to 14732. [2021-07-13 19:18:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14732 states, 14731 states have (on average 2.5756567782227955) internal successors, (37942), 14731 states have internal predecessors, (37942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:29,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 37942 transitions. [2021-07-13 19:18:29,156 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 37942 transitions. Word has length 59 [2021-07-13 19:18:29,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:29,156 INFO L482 AbstractCegarLoop]: Abstraction has 14732 states and 37942 transitions. [2021-07-13 19:18:29,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 37942 transitions. [2021-07-13 19:18:29,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:29,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:29,169 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:29,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:29,369 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:29,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:29,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1617854181, now seen corresponding path program 269 times [2021-07-13 19:18:29,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:29,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798969437] [2021-07-13 19:18:29,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:29,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:29,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798969437] [2021-07-13 19:18:29,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798969437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:29,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720392231] [2021-07-13 19:18:29,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:29,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-13 19:18:29,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:29,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:29,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:29,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720392231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:29,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:29,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:18:29,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955162313] [2021-07-13 19:18:29,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:29,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:29,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:29,574 INFO L87 Difference]: Start difference. First operand 14732 states and 37942 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:30,249 INFO L93 Difference]: Finished difference Result 15859 states and 40013 transitions. [2021-07-13 19:18:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:30,272 INFO L225 Difference]: With dead ends: 15859 [2021-07-13 19:18:30,272 INFO L226 Difference]: Without dead ends: 15767 [2021-07-13 19:18:30,272 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15767 states. [2021-07-13 19:18:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15767 to 14855. [2021-07-13 19:18:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14855 states, 14854 states have (on average 2.569341591490508) internal successors, (38165), 14854 states have internal predecessors, (38165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14855 states to 14855 states and 38165 transitions. [2021-07-13 19:18:30,507 INFO L78 Accepts]: Start accepts. Automaton has 14855 states and 38165 transitions. Word has length 59 [2021-07-13 19:18:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:30,507 INFO L482 AbstractCegarLoop]: Abstraction has 14855 states and 38165 transitions. [2021-07-13 19:18:30,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 14855 states and 38165 transitions. [2021-07-13 19:18:30,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:30,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:30,519 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:30,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:30,720 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:30,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2063576935, now seen corresponding path program 270 times [2021-07-13 19:18:30,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:30,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688789715] [2021-07-13 19:18:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:30,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:30,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688789715] [2021-07-13 19:18:30,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688789715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:30,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051436900] [2021-07-13 19:18:30,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:30,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 19:18:30,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:30,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:30,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051436900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:30,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:30,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:18:30,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51907420] [2021-07-13 19:18:30,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:30,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:30,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:30,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:30,985 INFO L87 Difference]: Start difference. First operand 14855 states and 38165 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:31,531 INFO L93 Difference]: Finished difference Result 16568 states and 41541 transitions. [2021-07-13 19:18:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:31,557 INFO L225 Difference]: With dead ends: 16568 [2021-07-13 19:18:31,557 INFO L226 Difference]: Without dead ends: 16556 [2021-07-13 19:18:31,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16556 states. [2021-07-13 19:18:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16556 to 14951. [2021-07-13 19:18:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14951 states, 14950 states have (on average 2.568561872909699) internal successors, (38400), 14950 states have internal predecessors, (38400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 38400 transitions. [2021-07-13 19:18:31,797 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 38400 transitions. Word has length 59 [2021-07-13 19:18:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:31,797 INFO L482 AbstractCegarLoop]: Abstraction has 14951 states and 38400 transitions. [2021-07-13 19:18:31,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 38400 transitions. [2021-07-13 19:18:31,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:31,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:31,810 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:32,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:32,010 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:32,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:32,010 INFO L82 PathProgramCache]: Analyzing trace with hash 415219432, now seen corresponding path program 271 times [2021-07-13 19:18:32,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:32,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789722991] [2021-07-13 19:18:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:32,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:32,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789722991] [2021-07-13 19:18:32,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789722991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:32,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397353669] [2021-07-13 19:18:32,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:32,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:32,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:32,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397353669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:32,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:32,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:18:32,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140428830] [2021-07-13 19:18:32,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:32,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:32,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:32,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:32,176 INFO L87 Difference]: Start difference. First operand 14951 states and 38400 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:32,400 INFO L93 Difference]: Finished difference Result 17530 states and 42981 transitions. [2021-07-13 19:18:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:18:32,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:32,428 INFO L225 Difference]: With dead ends: 17530 [2021-07-13 19:18:32,428 INFO L226 Difference]: Without dead ends: 17512 [2021-07-13 19:18:32,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17512 states. [2021-07-13 19:18:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17512 to 14926. [2021-07-13 19:18:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14926 states, 14925 states have (on average 2.5662311557788944) internal successors, (38301), 14925 states have internal predecessors, (38301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14926 states to 14926 states and 38301 transitions. [2021-07-13 19:18:32,679 INFO L78 Accepts]: Start accepts. Automaton has 14926 states and 38301 transitions. Word has length 59 [2021-07-13 19:18:32,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:32,679 INFO L482 AbstractCegarLoop]: Abstraction has 14926 states and 38301 transitions. [2021-07-13 19:18:32,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:32,679 INFO L276 IsEmpty]: Start isEmpty. Operand 14926 states and 38301 transitions. [2021-07-13 19:18:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:32,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:32,692 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:32,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:32,893 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash -89473027, now seen corresponding path program 272 times [2021-07-13 19:18:32,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:32,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484640201] [2021-07-13 19:18:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:32,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:32,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484640201] [2021-07-13 19:18:32,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484640201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:32,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314745656] [2021-07-13 19:18:32,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:33,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:33,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:33,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:33,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314745656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:33,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:33,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:33,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953122491] [2021-07-13 19:18:33,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:33,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:33,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:33,091 INFO L87 Difference]: Start difference. First operand 14926 states and 38301 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:33,834 INFO L93 Difference]: Finished difference Result 18642 states and 46055 transitions. [2021-07-13 19:18:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:18:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:33,863 INFO L225 Difference]: With dead ends: 18642 [2021-07-13 19:18:33,863 INFO L226 Difference]: Without dead ends: 18588 [2021-07-13 19:18:33,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:18:33,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18588 states. [2021-07-13 19:18:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18588 to 15189. [2021-07-13 19:18:34,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15189 states, 15188 states have (on average 2.568145904661575) internal successors, (39005), 15188 states have internal predecessors, (39005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 39005 transitions. [2021-07-13 19:18:34,118 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 39005 transitions. Word has length 59 [2021-07-13 19:18:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:34,118 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 39005 transitions. [2021-07-13 19:18:34,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:34,118 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 39005 transitions. [2021-07-13 19:18:34,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:34,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:34,131 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:34,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-07-13 19:18:34,331 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:34,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1443086082, now seen corresponding path program 273 times [2021-07-13 19:18:34,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:34,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041056504] [2021-07-13 19:18:34,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:34,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:34,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041056504] [2021-07-13 19:18:34,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041056504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:34,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676479925] [2021-07-13 19:18:34,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:34,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 19:18:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:34,509 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:34,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676479925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:34,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:34,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:18:34,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036869436] [2021-07-13 19:18:34,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:34,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:34,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:34,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:34,510 INFO L87 Difference]: Start difference. First operand 15189 states and 39005 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:34,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:34,736 INFO L93 Difference]: Finished difference Result 17831 states and 43702 transitions. [2021-07-13 19:18:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:18:34,736 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:34,763 INFO L225 Difference]: With dead ends: 17831 [2021-07-13 19:18:34,763 INFO L226 Difference]: Without dead ends: 17807 [2021-07-13 19:18:34,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17807 states. [2021-07-13 19:18:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17807 to 15189. [2021-07-13 19:18:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15189 states, 15188 states have (on average 2.5672241243086646) internal successors, (38991), 15188 states have internal predecessors, (38991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 38991 transitions. [2021-07-13 19:18:35,010 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 38991 transitions. Word has length 59 [2021-07-13 19:18:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:35,010 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 38991 transitions. [2021-07-13 19:18:35,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 38991 transitions. [2021-07-13 19:18:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:35,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:35,023 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:35,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:35,223 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:35,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:35,223 INFO L82 PathProgramCache]: Analyzing trace with hash 65363507, now seen corresponding path program 274 times [2021-07-13 19:18:35,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:35,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113536420] [2021-07-13 19:18:35,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:35,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:35,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113536420] [2021-07-13 19:18:35,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113536420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:35,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353933295] [2021-07-13 19:18:35,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:35,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:35,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:35,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:35,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:35,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353933295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:35,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:35,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:35,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827007284] [2021-07-13 19:18:35,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:35,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:35,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:35,425 INFO L87 Difference]: Start difference. First operand 15189 states and 38991 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:36,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:36,459 INFO L93 Difference]: Finished difference Result 23093 states and 55993 transitions. [2021-07-13 19:18:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:18:36,460 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:36,491 INFO L225 Difference]: With dead ends: 23093 [2021-07-13 19:18:36,492 INFO L226 Difference]: Without dead ends: 22913 [2021-07-13 19:18:36,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:18:36,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22913 states. [2021-07-13 19:18:36,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22913 to 15680. [2021-07-13 19:18:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15680 states, 15679 states have (on average 2.568403597168187) internal successors, (40270), 15679 states have internal predecessors, (40270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40270 transitions. [2021-07-13 19:18:36,784 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40270 transitions. Word has length 59 [2021-07-13 19:18:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:36,784 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40270 transitions. [2021-07-13 19:18:36,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40270 transitions. [2021-07-13 19:18:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:36,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:36,798 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:36,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:36,998 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash 451966184, now seen corresponding path program 275 times [2021-07-13 19:18:36,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:36,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376956162] [2021-07-13 19:18:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:37,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:37,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376956162] [2021-07-13 19:18:37,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376956162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:37,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755237878] [2021-07-13 19:18:37,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:37,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:18:37,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:37,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 46 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:37,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755237878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:37,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:37,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 17 [2021-07-13 19:18:37,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654178433] [2021-07-13 19:18:37,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:18:37,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:37,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:18:37,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:37,239 INFO L87 Difference]: Start difference. First operand 15680 states and 40270 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:37,593 INFO L93 Difference]: Finished difference Result 18578 states and 45476 transitions. [2021-07-13 19:18:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:18:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:37,624 INFO L225 Difference]: With dead ends: 18578 [2021-07-13 19:18:37,624 INFO L226 Difference]: Without dead ends: 18545 [2021-07-13 19:18:37,624 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:37,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18545 states. [2021-07-13 19:18:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18545 to 15680. [2021-07-13 19:18:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15680 states, 15679 states have (on average 2.567829580968174) internal successors, (40261), 15679 states have internal predecessors, (40261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40261 transitions. [2021-07-13 19:18:37,885 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40261 transitions. Word has length 59 [2021-07-13 19:18:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:37,886 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40261 transitions. [2021-07-13 19:18:37,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40261 transitions. [2021-07-13 19:18:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:37,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:37,899 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:38,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:38,099 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:38,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:38,100 INFO L82 PathProgramCache]: Analyzing trace with hash 5671997, now seen corresponding path program 276 times [2021-07-13 19:18:38,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:38,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368591018] [2021-07-13 19:18:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:38,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:38,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368591018] [2021-07-13 19:18:38,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368591018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:38,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716423605] [2021-07-13 19:18:38,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:38,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 19:18:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:38,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:38,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:38,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716423605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:38,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:38,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:18:38,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398754270] [2021-07-13 19:18:38,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:38,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:38,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:38,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:38,317 INFO L87 Difference]: Start difference. First operand 15680 states and 40261 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:39,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:39,711 INFO L93 Difference]: Finished difference Result 28722 states and 68889 transitions. [2021-07-13 19:18:39,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-13 19:18:39,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:39,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:39,761 INFO L225 Difference]: With dead ends: 28722 [2021-07-13 19:18:39,762 INFO L226 Difference]: Without dead ends: 28446 [2021-07-13 19:18:39,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 682.3ms TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2021-07-13 19:18:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28446 states. [2021-07-13 19:18:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28446 to 16072. [2021-07-13 19:18:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16072 states, 16071 states have (on average 2.5689129487897455) internal successors, (41285), 16071 states have internal predecessors, (41285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16072 states to 16072 states and 41285 transitions. [2021-07-13 19:18:40,107 INFO L78 Accepts]: Start accepts. Automaton has 16072 states and 41285 transitions. Word has length 59 [2021-07-13 19:18:40,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:40,107 INFO L482 AbstractCegarLoop]: Abstraction has 16072 states and 41285 transitions. [2021-07-13 19:18:40,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:40,107 INFO L276 IsEmpty]: Start isEmpty. Operand 16072 states and 41285 transitions. [2021-07-13 19:18:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:40,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:40,121 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:40,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable943 [2021-07-13 19:18:40,321 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1899244866, now seen corresponding path program 277 times [2021-07-13 19:18:40,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:40,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624002176] [2021-07-13 19:18:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:40,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:40,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624002176] [2021-07-13 19:18:40,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624002176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:40,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665442161] [2021-07-13 19:18:40,411 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:40,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:40,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:40,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665442161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:40,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:40,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:18:40,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333464265] [2021-07-13 19:18:40,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:40,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:40,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:40,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:40,519 INFO L87 Difference]: Start difference. First operand 16072 states and 41285 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:40,772 INFO L93 Difference]: Finished difference Result 18886 states and 46305 transitions. [2021-07-13 19:18:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:18:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:40,800 INFO L225 Difference]: With dead ends: 18886 [2021-07-13 19:18:40,800 INFO L226 Difference]: Without dead ends: 18844 [2021-07-13 19:18:40,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:40,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18844 states. [2021-07-13 19:18:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18844 to 15745. [2021-07-13 19:18:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15745 states, 15744 states have (on average 2.5645960365853657) internal successors, (40377), 15744 states have internal predecessors, (40377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15745 states to 15745 states and 40377 transitions. [2021-07-13 19:18:41,060 INFO L78 Accepts]: Start accepts. Automaton has 15745 states and 40377 transitions. Word has length 59 [2021-07-13 19:18:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:41,060 INFO L482 AbstractCegarLoop]: Abstraction has 15745 states and 40377 transitions. [2021-07-13 19:18:41,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 15745 states and 40377 transitions. [2021-07-13 19:18:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:41,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:41,075 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:41,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable944 [2021-07-13 19:18:41,275 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:41,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:41,276 INFO L82 PathProgramCache]: Analyzing trace with hash -147641869, now seen corresponding path program 278 times [2021-07-13 19:18:41,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:41,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355525971] [2021-07-13 19:18:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:41,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355525971] [2021-07-13 19:18:41,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355525971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:41,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219516254] [2021-07-13 19:18:41,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:41,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:41,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:41,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:41,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:41,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219516254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:41,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:41,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:18:41,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340234796] [2021-07-13 19:18:41,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:41,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:41,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:41,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:41,507 INFO L87 Difference]: Start difference. First operand 15745 states and 40377 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:42,367 INFO L93 Difference]: Finished difference Result 22153 states and 53662 transitions. [2021-07-13 19:18:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:18:42,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:42,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:42,400 INFO L225 Difference]: With dead ends: 22153 [2021-07-13 19:18:42,401 INFO L226 Difference]: Without dead ends: 21775 [2021-07-13 19:18:42,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:18:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-07-13 19:18:42,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 14506. [2021-07-13 19:18:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14506 states, 14505 states have (on average 2.5544295070665286) internal successors, (37052), 14505 states have internal predecessors, (37052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14506 states to 14506 states and 37052 transitions. [2021-07-13 19:18:42,668 INFO L78 Accepts]: Start accepts. Automaton has 14506 states and 37052 transitions. Word has length 59 [2021-07-13 19:18:42,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:42,668 INFO L482 AbstractCegarLoop]: Abstraction has 14506 states and 37052 transitions. [2021-07-13 19:18:42,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 14506 states and 37052 transitions. [2021-07-13 19:18:42,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:42,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:42,681 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:42,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable950 [2021-07-13 19:18:42,882 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:42,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:42,882 INFO L82 PathProgramCache]: Analyzing trace with hash -385703386, now seen corresponding path program 130 times [2021-07-13 19:18:42,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:42,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005521841] [2021-07-13 19:18:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:42,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:42,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005521841] [2021-07-13 19:18:42,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005521841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:42,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985129726] [2021-07-13 19:18:42,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:42,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:42,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:43,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985129726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:43,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:43,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:18:43,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790522588] [2021-07-13 19:18:43,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:43,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:43,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:43,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:43,050 INFO L87 Difference]: Start difference. First operand 14506 states and 37052 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:43,284 INFO L93 Difference]: Finished difference Result 18216 states and 44603 transitions. [2021-07-13 19:18:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:43,284 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:43,312 INFO L225 Difference]: With dead ends: 18216 [2021-07-13 19:18:43,312 INFO L226 Difference]: Without dead ends: 18202 [2021-07-13 19:18:43,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18202 states. [2021-07-13 19:18:43,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18202 to 14941. [2021-07-13 19:18:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14941 states, 14940 states have (on average 2.5593038821954486) internal successors, (38236), 14940 states have internal predecessors, (38236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14941 states to 14941 states and 38236 transitions. [2021-07-13 19:18:43,574 INFO L78 Accepts]: Start accepts. Automaton has 14941 states and 38236 transitions. Word has length 59 [2021-07-13 19:18:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:43,574 INFO L482 AbstractCegarLoop]: Abstraction has 14941 states and 38236 transitions. [2021-07-13 19:18:43,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 14941 states and 38236 transitions. [2021-07-13 19:18:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:43,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:43,587 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:43,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:43,788 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:43,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1007583796, now seen corresponding path program 131 times [2021-07-13 19:18:43,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:43,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689065522] [2021-07-13 19:18:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:43,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:43,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689065522] [2021-07-13 19:18:43,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689065522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:43,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918866658] [2021-07-13 19:18:43,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:43,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-13 19:18:43,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:43,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:43,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:43,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918866658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:43,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:43,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-13 19:18:43,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947271783] [2021-07-13 19:18:43,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:43,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:43,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:43,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:43,987 INFO L87 Difference]: Start difference. First operand 14941 states and 38236 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:44,277 INFO L93 Difference]: Finished difference Result 23419 states and 56616 transitions. [2021-07-13 19:18:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:44,278 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:44,315 INFO L225 Difference]: With dead ends: 23419 [2021-07-13 19:18:44,316 INFO L226 Difference]: Without dead ends: 23419 [2021-07-13 19:18:44,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:18:44,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23419 states. [2021-07-13 19:18:44,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23419 to 14952. [2021-07-13 19:18:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14952 states, 14951 states have (on average 2.5596281185205) internal successors, (38269), 14951 states have internal predecessors, (38269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14952 states to 14952 states and 38269 transitions. [2021-07-13 19:18:44,639 INFO L78 Accepts]: Start accepts. Automaton has 14952 states and 38269 transitions. Word has length 59 [2021-07-13 19:18:44,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:44,639 INFO L482 AbstractCegarLoop]: Abstraction has 14952 states and 38269 transitions. [2021-07-13 19:18:44,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:44,639 INFO L276 IsEmpty]: Start isEmpty. Operand 14952 states and 38269 transitions. [2021-07-13 19:18:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:44,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:44,652 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:44,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:44,853 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1649811044, now seen corresponding path program 132 times [2021-07-13 19:18:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:44,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361522268] [2021-07-13 19:18:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:44,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:44,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361522268] [2021-07-13 19:18:44,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361522268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:44,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44134208] [2021-07-13 19:18:44,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:44,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 19:18:44,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:44,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:45,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44134208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:45,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:45,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:18:45,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196444969] [2021-07-13 19:18:45,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:45,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:45,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:45,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:45,044 INFO L87 Difference]: Start difference. First operand 14952 states and 38269 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:45,371 INFO L93 Difference]: Finished difference Result 25599 states and 61804 transitions. [2021-07-13 19:18:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:45,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:45,415 INFO L225 Difference]: With dead ends: 25599 [2021-07-13 19:18:45,415 INFO L226 Difference]: Without dead ends: 25599 [2021-07-13 19:18:45,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:18:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-07-13 19:18:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 14991. [2021-07-13 19:18:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 14990 states have (on average 2.561307538358906) internal successors, (38394), 14990 states have internal predecessors, (38394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 38394 transitions. [2021-07-13 19:18:45,724 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 38394 transitions. Word has length 59 [2021-07-13 19:18:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:45,724 INFO L482 AbstractCegarLoop]: Abstraction has 14991 states and 38394 transitions. [2021-07-13 19:18:45,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:45,725 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 38394 transitions. [2021-07-13 19:18:45,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:45,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:45,737 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:45,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-07-13 19:18:45,938 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:45,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash -40184120, now seen corresponding path program 133 times [2021-07-13 19:18:45,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:45,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782044790] [2021-07-13 19:18:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 126 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:46,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:46,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782044790] [2021-07-13 19:18:46,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782044790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:46,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737105434] [2021-07-13 19:18:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:46,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:46,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 127 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:46,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737105434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:46,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:46,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:18:46,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984473450] [2021-07-13 19:18:46,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:46,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:46,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:46,133 INFO L87 Difference]: Start difference. First operand 14991 states and 38394 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:46,523 INFO L93 Difference]: Finished difference Result 25335 states and 61221 transitions. [2021-07-13 19:18:46,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:18:46,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:46,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:46,566 INFO L225 Difference]: With dead ends: 25335 [2021-07-13 19:18:46,566 INFO L226 Difference]: Without dead ends: 25335 [2021-07-13 19:18:46,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=254, Invalid=396, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:18:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25335 states. [2021-07-13 19:18:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25335 to 15025. [2021-07-13 19:18:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15025 states, 15024 states have (on average 2.562433439829606) internal successors, (38498), 15024 states have internal predecessors, (38498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15025 states to 15025 states and 38498 transitions. [2021-07-13 19:18:46,903 INFO L78 Accepts]: Start accepts. Automaton has 15025 states and 38498 transitions. Word has length 59 [2021-07-13 19:18:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:46,903 INFO L482 AbstractCegarLoop]: Abstraction has 15025 states and 38498 transitions. [2021-07-13 19:18:46,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 15025 states and 38498 transitions. [2021-07-13 19:18:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:46,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:46,916 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:47,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable955 [2021-07-13 19:18:47,116 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:47,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1079471132, now seen corresponding path program 134 times [2021-07-13 19:18:47,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:47,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563212278] [2021-07-13 19:18:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:47,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:47,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563212278] [2021-07-13 19:18:47,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563212278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:47,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651101057] [2021-07-13 19:18:47,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:47,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:47,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:47,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:47,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:47,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651101057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:47,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:47,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:18:47,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342223634] [2021-07-13 19:18:47,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:47,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:47,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:47,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:47,331 INFO L87 Difference]: Start difference. First operand 15025 states and 38498 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:47,735 INFO L93 Difference]: Finished difference Result 22714 states and 55093 transitions. [2021-07-13 19:18:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:47,771 INFO L225 Difference]: With dead ends: 22714 [2021-07-13 19:18:47,771 INFO L226 Difference]: Without dead ends: 22714 [2021-07-13 19:18:47,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:18:47,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22714 states. [2021-07-13 19:18:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22714 to 15046. [2021-07-13 19:18:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15046 states, 15045 states have (on average 2.5626453971419076) internal successors, (38555), 15045 states have internal predecessors, (38555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:48,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15046 states to 15046 states and 38555 transitions. [2021-07-13 19:18:48,063 INFO L78 Accepts]: Start accepts. Automaton has 15046 states and 38555 transitions. Word has length 59 [2021-07-13 19:18:48,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:48,063 INFO L482 AbstractCegarLoop]: Abstraction has 15046 states and 38555 transitions. [2021-07-13 19:18:48,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:48,063 INFO L276 IsEmpty]: Start isEmpty. Operand 15046 states and 38555 transitions. [2021-07-13 19:18:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:48,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:48,076 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:48,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:48,277 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -59608760, now seen corresponding path program 135 times [2021-07-13 19:18:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117492110] [2021-07-13 19:18:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:48,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:48,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117492110] [2021-07-13 19:18:48,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117492110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:48,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582746116] [2021-07-13 19:18:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:48,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-13 19:18:48,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:48,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:48,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 107 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:48,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582746116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:48,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:48,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-07-13 19:18:48,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164663963] [2021-07-13 19:18:48,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:18:48,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:48,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:18:48,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:18:48,510 INFO L87 Difference]: Start difference. First operand 15046 states and 38555 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:48,885 INFO L93 Difference]: Finished difference Result 18929 states and 46502 transitions. [2021-07-13 19:18:48,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:18:48,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:48,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:48,914 INFO L225 Difference]: With dead ends: 18929 [2021-07-13 19:18:48,914 INFO L226 Difference]: Without dead ends: 18929 [2021-07-13 19:18:48,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:18:48,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18929 states. [2021-07-13 19:18:49,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18929 to 14402. [2021-07-13 19:18:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 2.552669953475453) internal successors, (36761), 14401 states have internal predecessors, (36761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36761 transitions. [2021-07-13 19:18:49,245 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36761 transitions. Word has length 59 [2021-07-13 19:18:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:49,245 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36761 transitions. [2021-07-13 19:18:49,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36761 transitions. [2021-07-13 19:18:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:49,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:49,256 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:49,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable957 [2021-07-13 19:18:49,457 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:49,457 INFO L82 PathProgramCache]: Analyzing trace with hash 601775784, now seen corresponding path program 279 times [2021-07-13 19:18:49,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:49,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268871775] [2021-07-13 19:18:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:49,563 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:49,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268871775] [2021-07-13 19:18:49,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268871775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:49,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404927849] [2021-07-13 19:18:49,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:49,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 19:18:49,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:49,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:49,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:49,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404927849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:49,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:49,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:18:49,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620567339] [2021-07-13 19:18:49,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:18:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:18:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:49,674 INFO L87 Difference]: Start difference. First operand 14402 states and 36761 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:49,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:49,958 INFO L93 Difference]: Finished difference Result 16717 states and 40878 transitions. [2021-07-13 19:18:49,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:49,958 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:49,983 INFO L225 Difference]: With dead ends: 16717 [2021-07-13 19:18:49,983 INFO L226 Difference]: Without dead ends: 16672 [2021-07-13 19:18:49,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16672 states. [2021-07-13 19:18:50,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16672 to 14402. [2021-07-13 19:18:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 2.552044996875217) internal successors, (36752), 14401 states have internal predecessors, (36752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36752 transitions. [2021-07-13 19:18:50,213 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36752 transitions. Word has length 59 [2021-07-13 19:18:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:50,213 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36752 transitions. [2021-07-13 19:18:50,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36752 transitions. [2021-07-13 19:18:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:50,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:50,225 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:50,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable958,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:50,426 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:50,426 INFO L82 PathProgramCache]: Analyzing trace with hash 972677468, now seen corresponding path program 280 times [2021-07-13 19:18:50,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:50,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609335614] [2021-07-13 19:18:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:50,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:50,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609335614] [2021-07-13 19:18:50,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609335614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:50,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378924451] [2021-07-13 19:18:50,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:50,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:50,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:50,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:50,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:50,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378924451] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:50,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:50,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:18:50,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043776773] [2021-07-13 19:18:50,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:18:50,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:18:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:18:50,591 INFO L87 Difference]: Start difference. First operand 14402 states and 36752 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:50,759 INFO L93 Difference]: Finished difference Result 17320 states and 42003 transitions. [2021-07-13 19:18:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:18:50,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:50,786 INFO L225 Difference]: With dead ends: 17320 [2021-07-13 19:18:50,786 INFO L226 Difference]: Without dead ends: 17317 [2021-07-13 19:18:50,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:50,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17317 states. [2021-07-13 19:18:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17317 to 14390. [2021-07-13 19:18:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14390 states, 14389 states have (on average 2.5509069428035303) internal successors, (36705), 14389 states have internal predecessors, (36705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:51,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36705 transitions. [2021-07-13 19:18:51,023 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36705 transitions. Word has length 59 [2021-07-13 19:18:51,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:51,023 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36705 transitions. [2021-07-13 19:18:51,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:51,023 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36705 transitions. [2021-07-13 19:18:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:51,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:51,036 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:51,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-07-13 19:18:51,236 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:51,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1179740034, now seen corresponding path program 281 times [2021-07-13 19:18:51,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:51,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638533377] [2021-07-13 19:18:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:51,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:51,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638533377] [2021-07-13 19:18:51,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638533377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:51,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95094455] [2021-07-13 19:18:51,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:51,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-13 19:18:51,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:51,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:51,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:18:51,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95094455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:51,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:51,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-07-13 19:18:51,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675436039] [2021-07-13 19:18:51,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:18:51,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:18:51,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:18:51,426 INFO L87 Difference]: Start difference. First operand 14390 states and 36705 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:51,678 INFO L93 Difference]: Finished difference Result 17479 states and 42286 transitions. [2021-07-13 19:18:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:18:51,679 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:51,706 INFO L225 Difference]: With dead ends: 17479 [2021-07-13 19:18:51,706 INFO L226 Difference]: Without dead ends: 17461 [2021-07-13 19:18:51,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17461 states. [2021-07-13 19:18:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17461 to 14390. [2021-07-13 19:18:51,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14390 states, 14389 states have (on average 2.549308499548266) internal successors, (36682), 14389 states have internal predecessors, (36682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36682 transitions. [2021-07-13 19:18:51,984 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36682 transitions. Word has length 59 [2021-07-13 19:18:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:51,984 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36682 transitions. [2021-07-13 19:18:51,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36682 transitions. [2021-07-13 19:18:51,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:51,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:51,997 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:52,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable967,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:52,197 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:52,197 INFO L82 PathProgramCache]: Analyzing trace with hash -268259979, now seen corresponding path program 282 times [2021-07-13 19:18:52,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:52,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368996076] [2021-07-13 19:18:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:52,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:52,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368996076] [2021-07-13 19:18:52,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368996076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:52,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818439516] [2021-07-13 19:18:52,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:52,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 19:18:52,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:52,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:52,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:52,396 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:52,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818439516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:52,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:52,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:18:52,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197757006] [2021-07-13 19:18:52,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:52,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:52,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:52,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:52,397 INFO L87 Difference]: Start difference. First operand 14390 states and 36682 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:53,126 INFO L93 Difference]: Finished difference Result 16064 states and 39766 transitions. [2021-07-13 19:18:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:53,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:53,151 INFO L225 Difference]: With dead ends: 16064 [2021-07-13 19:18:53,151 INFO L226 Difference]: Without dead ends: 15797 [2021-07-13 19:18:53,151 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15797 states. [2021-07-13 19:18:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15797 to 14403. [2021-07-13 19:18:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14403 states, 14402 states have (on average 2.540411054020275) internal successors, (36587), 14402 states have internal predecessors, (36587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14403 states to 14403 states and 36587 transitions. [2021-07-13 19:18:53,377 INFO L78 Accepts]: Start accepts. Automaton has 14403 states and 36587 transitions. Word has length 59 [2021-07-13 19:18:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:53,377 INFO L482 AbstractCegarLoop]: Abstraction has 14403 states and 36587 transitions. [2021-07-13 19:18:53,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:53,377 INFO L276 IsEmpty]: Start isEmpty. Operand 14403 states and 36587 transitions. [2021-07-13 19:18:53,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:53,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:53,390 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:53,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-07-13 19:18:53,590 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:53,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:53,590 INFO L82 PathProgramCache]: Analyzing trace with hash -881796159, now seen corresponding path program 283 times [2021-07-13 19:18:53,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:53,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909430856] [2021-07-13 19:18:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:53,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:53,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909430856] [2021-07-13 19:18:53,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909430856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:53,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773127672] [2021-07-13 19:18:53,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:53,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:53,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773127672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:53,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:53,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:18:53,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440264273] [2021-07-13 19:18:53,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:18:53,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:53,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:18:53,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:18:53,814 INFO L87 Difference]: Start difference. First operand 14403 states and 36587 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:54,319 INFO L93 Difference]: Finished difference Result 16239 states and 40254 transitions. [2021-07-13 19:18:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:18:54,319 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:54,344 INFO L225 Difference]: With dead ends: 16239 [2021-07-13 19:18:54,344 INFO L226 Difference]: Without dead ends: 16227 [2021-07-13 19:18:54,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:18:54,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16227 states. [2021-07-13 19:18:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16227 to 14558. [2021-07-13 19:18:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14558 states, 14557 states have (on average 2.540221199422958) internal successors, (36978), 14557 states have internal predecessors, (36978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:54,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14558 states to 14558 states and 36978 transitions. [2021-07-13 19:18:54,608 INFO L78 Accepts]: Start accepts. Automaton has 14558 states and 36978 transitions. Word has length 59 [2021-07-13 19:18:54,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:54,608 INFO L482 AbstractCegarLoop]: Abstraction has 14558 states and 36978 transitions. [2021-07-13 19:18:54,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:54,609 INFO L276 IsEmpty]: Start isEmpty. Operand 14558 states and 36978 transitions. [2021-07-13 19:18:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:54,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:54,621 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:54,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable971,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:54,822 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:54,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:54,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1039095646, now seen corresponding path program 136 times [2021-07-13 19:18:54,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:54,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822380378] [2021-07-13 19:18:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:54,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:54,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822380378] [2021-07-13 19:18:54,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822380378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:54,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013819184] [2021-07-13 19:18:54,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:54,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:54,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:54,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:54,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013819184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:54,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:54,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:18:54,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533428492] [2021-07-13 19:18:54,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:54,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:54,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:54,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:54,995 INFO L87 Difference]: Start difference. First operand 14558 states and 36978 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:55,248 INFO L93 Difference]: Finished difference Result 17769 states and 43570 transitions. [2021-07-13 19:18:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:18:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:55,277 INFO L225 Difference]: With dead ends: 17769 [2021-07-13 19:18:55,277 INFO L226 Difference]: Without dead ends: 17739 [2021-07-13 19:18:55,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:55,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17739 states. [2021-07-13 19:18:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17739 to 15059. [2021-07-13 19:18:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15059 states, 15058 states have (on average 2.5455571789082216) internal successors, (38331), 15058 states have internal predecessors, (38331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15059 states to 15059 states and 38331 transitions. [2021-07-13 19:18:55,525 INFO L78 Accepts]: Start accepts. Automaton has 15059 states and 38331 transitions. Word has length 59 [2021-07-13 19:18:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:55,525 INFO L482 AbstractCegarLoop]: Abstraction has 15059 states and 38331 transitions. [2021-07-13 19:18:55,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 15059 states and 38331 transitions. [2021-07-13 19:18:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:55,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:55,538 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:55,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-07-13 19:18:55,738 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:55,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:55,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1260121175, now seen corresponding path program 284 times [2021-07-13 19:18:55,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:55,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952557307] [2021-07-13 19:18:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:55,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:55,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952557307] [2021-07-13 19:18:55,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952557307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:55,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682645428] [2021-07-13 19:18:55,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:55,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:18:55,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:55,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:55,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682645428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:55,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:55,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:18:55,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404242439] [2021-07-13 19:18:55,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:55,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:55,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:55,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:55,929 INFO L87 Difference]: Start difference. First operand 15059 states and 38331 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:56,712 INFO L93 Difference]: Finished difference Result 19111 states and 46968 transitions. [2021-07-13 19:18:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:18:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:56,742 INFO L225 Difference]: With dead ends: 19111 [2021-07-13 19:18:56,742 INFO L226 Difference]: Without dead ends: 19057 [2021-07-13 19:18:56,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:18:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19057 states. [2021-07-13 19:18:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19057 to 15532. [2021-07-13 19:18:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15532 states, 15531 states have (on average 2.551155753010109) internal successors, (39622), 15531 states have internal predecessors, (39622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39622 transitions. [2021-07-13 19:18:57,005 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39622 transitions. Word has length 59 [2021-07-13 19:18:57,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:57,005 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39622 transitions. [2021-07-13 19:18:57,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39622 transitions. [2021-07-13 19:18:57,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:57,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:57,017 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:57,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-07-13 19:18:57,218 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:57,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:57,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1502287012, now seen corresponding path program 285 times [2021-07-13 19:18:57,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:57,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616869495] [2021-07-13 19:18:57,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:57,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:57,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616869495] [2021-07-13 19:18:57,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616869495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:57,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860985334] [2021-07-13 19:18:57,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:57,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 19:18:57,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:57,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:18:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:18:57,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860985334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:57,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:57,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:18:57,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971043641] [2021-07-13 19:18:57,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:18:57,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:18:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:18:57,471 INFO L87 Difference]: Start difference. First operand 15532 states and 39622 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:57,705 INFO L93 Difference]: Finished difference Result 18411 states and 44785 transitions. [2021-07-13 19:18:57,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:18:57,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:57,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:57,733 INFO L225 Difference]: With dead ends: 18411 [2021-07-13 19:18:57,733 INFO L226 Difference]: Without dead ends: 18387 [2021-07-13 19:18:57,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:18:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18387 states. [2021-07-13 19:18:57,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18387 to 15532. [2021-07-13 19:18:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15532 states, 15531 states have (on average 2.54993239327796) internal successors, (39603), 15531 states have internal predecessors, (39603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39603 transitions. [2021-07-13 19:18:57,984 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39603 transitions. Word has length 59 [2021-07-13 19:18:57,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:57,984 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39603 transitions. [2021-07-13 19:18:57,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:57,984 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39603 transitions. [2021-07-13 19:18:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:57,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:57,998 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:58,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-07-13 19:18:58,213 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1414957709, now seen corresponding path program 286 times [2021-07-13 19:18:58,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:58,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896018353] [2021-07-13 19:18:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:58,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:58,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896018353] [2021-07-13 19:18:58,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896018353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:58,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435895396] [2021-07-13 19:18:58,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:58,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:18:58,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:58,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:18:58,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:18:58,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435895396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:58,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:58,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:18:58,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313270819] [2021-07-13 19:18:58,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:58,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:58,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:58,420 INFO L87 Difference]: Start difference. First operand 15532 states and 39603 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:59,532 INFO L93 Difference]: Finished difference Result 24361 states and 58995 transitions. [2021-07-13 19:18:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:18:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:18:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:59,572 INFO L225 Difference]: With dead ends: 24361 [2021-07-13 19:18:59,572 INFO L226 Difference]: Without dead ends: 24193 [2021-07-13 19:18:59,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 446.0ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:18:59,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24193 states. [2021-07-13 19:18:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24193 to 16448. [2021-07-13 19:18:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16448 states, 16447 states have (on average 2.5559676536754425) internal successors, (42038), 16447 states have internal predecessors, (42038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42038 transitions. [2021-07-13 19:18:59,956 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42038 transitions. Word has length 59 [2021-07-13 19:18:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:59,957 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42038 transitions. [2021-07-13 19:18:59,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42038 transitions. [2021-07-13 19:18:59,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:18:59,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:59,969 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:00,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:00,170 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:00,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:00,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1801560386, now seen corresponding path program 287 times [2021-07-13 19:19:00,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:00,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990203504] [2021-07-13 19:19:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:00,251 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:00,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:00,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990203504] [2021-07-13 19:19:00,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990203504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:00,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351094146] [2021-07-13 19:19:00,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:00,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 19:19:00,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:00,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:00,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351094146] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:00,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:00,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-07-13 19:19:00,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908967887] [2021-07-13 19:19:00,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:00,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:00,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:00,377 INFO L87 Difference]: Start difference. First operand 16448 states and 42038 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:00,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:00,690 INFO L93 Difference]: Finished difference Result 19584 states and 47707 transitions. [2021-07-13 19:19:00,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:19:00,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:00,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:00,719 INFO L225 Difference]: With dead ends: 19584 [2021-07-13 19:19:00,719 INFO L226 Difference]: Without dead ends: 19551 [2021-07-13 19:19:00,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:19:00,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19551 states. [2021-07-13 19:19:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19551 to 16448. [2021-07-13 19:19:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16448 states, 16447 states have (on average 2.5550556332461847) internal successors, (42023), 16447 states have internal predecessors, (42023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42023 transitions. [2021-07-13 19:19:00,999 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42023 transitions. Word has length 59 [2021-07-13 19:19:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:00,999 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42023 transitions. [2021-07-13 19:19:00,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42023 transitions. [2021-07-13 19:19:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:01,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:01,012 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:01,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-07-13 19:19:01,213 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:01,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:01,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1355266199, now seen corresponding path program 288 times [2021-07-13 19:19:01,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:01,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161060521] [2021-07-13 19:19:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:01,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:01,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161060521] [2021-07-13 19:19:01,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161060521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:01,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378852809] [2021-07-13 19:19:01,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:01,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 19:19:01,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:01,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:01,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:01,429 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:01,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378852809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:01,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:01,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:19:01,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238636569] [2021-07-13 19:19:01,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:01,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:01,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:01,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:01,430 INFO L87 Difference]: Start difference. First operand 16448 states and 42023 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:03,102 INFO L93 Difference]: Finished difference Result 35626 states and 84935 transitions. [2021-07-13 19:19:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-13 19:19:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:03,163 INFO L225 Difference]: With dead ends: 35626 [2021-07-13 19:19:03,164 INFO L226 Difference]: Without dead ends: 35104 [2021-07-13 19:19:03,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 843.8ms TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2021-07-13 19:19:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35104 states. [2021-07-13 19:19:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35104 to 17932. [2021-07-13 19:19:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17932 states, 17931 states have (on average 2.560760693770565) internal successors, (45917), 17931 states have internal predecessors, (45917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45917 transitions. [2021-07-13 19:19:03,571 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45917 transitions. Word has length 59 [2021-07-13 19:19:03,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:03,572 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45917 transitions. [2021-07-13 19:19:03,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:03,572 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45917 transitions. [2021-07-13 19:19:03,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:03,586 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:03,586 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:03,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:03,799 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:03,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1046128228, now seen corresponding path program 289 times [2021-07-13 19:19:03,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:03,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824715948] [2021-07-13 19:19:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:03,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:03,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824715948] [2021-07-13 19:19:03,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824715948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:03,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697018621] [2021-07-13 19:19:03,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:03,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:03,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:03,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697018621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:03,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:03,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:19:03,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427264322] [2021-07-13 19:19:03,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:03,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:03,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:03,996 INFO L87 Difference]: Start difference. First operand 17932 states and 45917 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:04,267 INFO L93 Difference]: Finished difference Result 21190 states and 51795 transitions. [2021-07-13 19:19:04,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:19:04,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:04,300 INFO L225 Difference]: With dead ends: 21190 [2021-07-13 19:19:04,300 INFO L226 Difference]: Without dead ends: 21148 [2021-07-13 19:19:04,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:19:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21148 states. [2021-07-13 19:19:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21148 to 17932. [2021-07-13 19:19:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17932 states, 17931 states have (on average 2.5599241537002957) internal successors, (45902), 17931 states have internal predecessors, (45902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:04,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45902 transitions. [2021-07-13 19:19:04,616 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45902 transitions. Word has length 59 [2021-07-13 19:19:04,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:04,616 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45902 transitions. [2021-07-13 19:19:04,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45902 transitions. [2021-07-13 19:19:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:04,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:04,630 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:04,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-07-13 19:19:04,830 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:04,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1201952333, now seen corresponding path program 290 times [2021-07-13 19:19:04,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:04,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765068501] [2021-07-13 19:19:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:04,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:04,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765068501] [2021-07-13 19:19:04,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765068501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:04,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916742084] [2021-07-13 19:19:04,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:04,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:04,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:04,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:05,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916742084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:05,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:05,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:19:05,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173475031] [2021-07-13 19:19:05,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:05,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:05,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:05,055 INFO L87 Difference]: Start difference. First operand 17932 states and 45902 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:07,543 INFO L93 Difference]: Finished difference Result 45251 states and 107889 transitions. [2021-07-13 19:19:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-07-13 19:19:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:07,628 INFO L225 Difference]: With dead ends: 45251 [2021-07-13 19:19:07,628 INFO L226 Difference]: Without dead ends: 44633 [2021-07-13 19:19:07,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6679 ImplicationChecksByTransitivity, 1622.2ms TimeCoverageRelationStatistics Valid=1467, Invalid=15563, Unknown=0, NotChecked=0, Total=17030 [2021-07-13 19:19:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44633 states. [2021-07-13 19:19:08,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44633 to 19324. [2021-07-13 19:19:08,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19324 states, 19323 states have (on average 2.5631630699166794) internal successors, (49528), 19323 states have internal predecessors, (49528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:08,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 49528 transitions. [2021-07-13 19:19:08,285 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 49528 transitions. Word has length 59 [2021-07-13 19:19:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:08,286 INFO L482 AbstractCegarLoop]: Abstraction has 19324 states and 49528 transitions. [2021-07-13 19:19:08,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 49528 transitions. [2021-07-13 19:19:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:08,299 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:08,299 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:08,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-07-13 19:19:08,499 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1951369986, now seen corresponding path program 291 times [2021-07-13 19:19:08,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:08,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438532805] [2021-07-13 19:19:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:08,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438532805] [2021-07-13 19:19:08,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438532805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:08,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591693979] [2021-07-13 19:19:08,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:08,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:19:08,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:08,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:08,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591693979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:08,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:08,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:19:08,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524090929] [2021-07-13 19:19:08,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:08,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:08,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:08,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:08,715 INFO L87 Difference]: Start difference. First operand 19324 states and 49528 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:09,014 INFO L93 Difference]: Finished difference Result 22688 states and 55618 transitions. [2021-07-13 19:19:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:19:09,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:09,052 INFO L225 Difference]: With dead ends: 22688 [2021-07-13 19:19:09,052 INFO L226 Difference]: Without dead ends: 22637 [2021-07-13 19:19:09,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:09,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22637 states. [2021-07-13 19:19:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22637 to 18993. [2021-07-13 19:19:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18993 states, 18992 states have (on average 2.5599726200505475) internal successors, (48619), 18992 states have internal predecessors, (48619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:09,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18993 states to 18993 states and 48619 transitions. [2021-07-13 19:19:09,395 INFO L78 Accepts]: Start accepts. Automaton has 18993 states and 48619 transitions. Word has length 59 [2021-07-13 19:19:09,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:09,395 INFO L482 AbstractCegarLoop]: Abstraction has 18993 states and 48619 transitions. [2021-07-13 19:19:09,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:09,395 INFO L276 IsEmpty]: Start isEmpty. Operand 18993 states and 48619 transitions. [2021-07-13 19:19:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:09,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:09,409 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:09,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-07-13 19:19:09,609 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:09,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:09,610 INFO L82 PathProgramCache]: Analyzing trace with hash -621194025, now seen corresponding path program 292 times [2021-07-13 19:19:09,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:09,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582931678] [2021-07-13 19:19:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:09,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:09,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582931678] [2021-07-13 19:19:09,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582931678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:09,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106138028] [2021-07-13 19:19:09,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:09,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:09,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:09,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:09,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106138028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:09,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:09,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:19:09,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847175800] [2021-07-13 19:19:09,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:09,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:09,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:09,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:09,852 INFO L87 Difference]: Start difference. First operand 18993 states and 48619 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:10,736 INFO L93 Difference]: Finished difference Result 27005 states and 64480 transitions. [2021-07-13 19:19:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:10,737 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:10,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:10,783 INFO L225 Difference]: With dead ends: 27005 [2021-07-13 19:19:10,783 INFO L226 Difference]: Without dead ends: 26165 [2021-07-13 19:19:10,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 358.3ms TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:19:10,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26165 states. [2021-07-13 19:19:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26165 to 14615. [2021-07-13 19:19:11,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14614 states have (on average 2.5288764198713563) internal successors, (36957), 14614 states have internal predecessors, (36957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36957 transitions. [2021-07-13 19:19:11,125 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36957 transitions. Word has length 59 [2021-07-13 19:19:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:11,125 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36957 transitions. [2021-07-13 19:19:11,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:11,125 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36957 transitions. [2021-07-13 19:19:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:11,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:11,137 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:11,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-07-13 19:19:11,338 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:11,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1481135952, now seen corresponding path program 137 times [2021-07-13 19:19:11,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:11,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235743859] [2021-07-13 19:19:11,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:11,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:11,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235743859] [2021-07-13 19:19:11,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235743859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:11,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069395650] [2021-07-13 19:19:11,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:11,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-13 19:19:11,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:11,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:11,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069395650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:11,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:11,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-13 19:19:11,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328450543] [2021-07-13 19:19:11,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:11,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:11,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:11,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:11,531 INFO L87 Difference]: Start difference. First operand 14615 states and 36957 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:11,834 INFO L93 Difference]: Finished difference Result 22169 states and 53449 transitions. [2021-07-13 19:19:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:19:11,834 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:11,871 INFO L225 Difference]: With dead ends: 22169 [2021-07-13 19:19:11,871 INFO L226 Difference]: Without dead ends: 22169 [2021-07-13 19:19:11,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=180, Invalid=240, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:19:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22169 states. [2021-07-13 19:19:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22169 to 14758. [2021-07-13 19:19:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14758 states, 14757 states have (on average 2.533035169749949) internal successors, (37380), 14757 states have internal predecessors, (37380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14758 states to 14758 states and 37380 transitions. [2021-07-13 19:19:12,170 INFO L78 Accepts]: Start accepts. Automaton has 14758 states and 37380 transitions. Word has length 59 [2021-07-13 19:19:12,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:12,171 INFO L482 AbstractCegarLoop]: Abstraction has 14758 states and 37380 transitions. [2021-07-13 19:19:12,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:12,171 INFO L276 IsEmpty]: Start isEmpty. Operand 14758 states and 37380 transitions. [2021-07-13 19:19:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:12,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:12,183 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:12,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-07-13 19:19:12,384 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:12,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1176258888, now seen corresponding path program 138 times [2021-07-13 19:19:12,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:12,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83926609] [2021-07-13 19:19:12,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:12,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:12,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83926609] [2021-07-13 19:19:12,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83926609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:12,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942954316] [2021-07-13 19:19:12,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:12,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 19:19:12,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:12,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:12,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942954316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:12,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:12,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:19:12,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755727503] [2021-07-13 19:19:12,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:12,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:12,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:12,576 INFO L87 Difference]: Start difference. First operand 14758 states and 37380 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:12,926 INFO L93 Difference]: Finished difference Result 24727 states and 59450 transitions. [2021-07-13 19:19:12,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:19:12,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:12,972 INFO L225 Difference]: With dead ends: 24727 [2021-07-13 19:19:12,972 INFO L226 Difference]: Without dead ends: 24727 [2021-07-13 19:19:12,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:19:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24727 states. [2021-07-13 19:19:13,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24727 to 14806. [2021-07-13 19:19:13,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14806 states, 14805 states have (on average 2.534481594056062) internal successors, (37523), 14805 states have internal predecessors, (37523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14806 states to 14806 states and 37523 transitions. [2021-07-13 19:19:13,328 INFO L78 Accepts]: Start accepts. Automaton has 14806 states and 37523 transitions. Word has length 59 [2021-07-13 19:19:13,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:13,328 INFO L482 AbstractCegarLoop]: Abstraction has 14806 states and 37523 transitions. [2021-07-13 19:19:13,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:13,328 INFO L276 IsEmpty]: Start isEmpty. Operand 14806 states and 37523 transitions. [2021-07-13 19:19:13,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:13,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:13,341 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:13,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1003,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:13,541 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash -513736276, now seen corresponding path program 139 times [2021-07-13 19:19:13,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:13,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991070560] [2021-07-13 19:19:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:13,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:13,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:13,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991070560] [2021-07-13 19:19:13,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991070560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:13,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754358702] [2021-07-13 19:19:13,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:13,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:13,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:13,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754358702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:13,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:13,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:19:13,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044853908] [2021-07-13 19:19:13,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:13,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:13,736 INFO L87 Difference]: Start difference. First operand 14806 states and 37523 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:14,167 INFO L93 Difference]: Finished difference Result 25465 states and 61218 transitions. [2021-07-13 19:19:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:14,209 INFO L225 Difference]: With dead ends: 25465 [2021-07-13 19:19:14,209 INFO L226 Difference]: Without dead ends: 25465 [2021-07-13 19:19:14,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:19:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2021-07-13 19:19:14,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 14863. [2021-07-13 19:19:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14863 states, 14862 states have (on average 2.5361997039429416) internal successors, (37693), 14862 states have internal predecessors, (37693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14863 states to 14863 states and 37693 transitions. [2021-07-13 19:19:14,523 INFO L78 Accepts]: Start accepts. Automaton has 14863 states and 37693 transitions. Word has length 59 [2021-07-13 19:19:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:14,523 INFO L482 AbstractCegarLoop]: Abstraction has 14863 states and 37693 transitions. [2021-07-13 19:19:14,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:14,524 INFO L276 IsEmpty]: Start isEmpty. Operand 14863 states and 37693 transitions. [2021-07-13 19:19:14,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:14,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:14,536 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:14,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-07-13 19:19:14,736 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:14,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1553023288, now seen corresponding path program 140 times [2021-07-13 19:19:14,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:14,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932446577] [2021-07-13 19:19:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:14,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:14,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932446577] [2021-07-13 19:19:14,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932446577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:14,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708285039] [2021-07-13 19:19:14,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:14,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:14,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:14,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:14,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 122 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:14,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708285039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:14,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:14,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:19:14,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524279922] [2021-07-13 19:19:14,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:14,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:14,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:14,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:14,944 INFO L87 Difference]: Start difference. First operand 14863 states and 37693 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:15,397 INFO L93 Difference]: Finished difference Result 24352 states and 58685 transitions. [2021-07-13 19:19:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:15,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:15,434 INFO L225 Difference]: With dead ends: 24352 [2021-07-13 19:19:15,434 INFO L226 Difference]: Without dead ends: 24352 [2021-07-13 19:19:15,434 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=355, Invalid=575, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:19:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24352 states. [2021-07-13 19:19:15,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24352 to 14909. [2021-07-13 19:19:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14909 states, 14908 states have (on average 2.5376978803327073) internal successors, (37832), 14908 states have internal predecessors, (37832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14909 states to 14909 states and 37832 transitions. [2021-07-13 19:19:15,794 INFO L78 Accepts]: Start accepts. Automaton has 14909 states and 37832 transitions. Word has length 59 [2021-07-13 19:19:15,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:15,794 INFO L482 AbstractCegarLoop]: Abstraction has 14909 states and 37832 transitions. [2021-07-13 19:19:15,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 14909 states and 37832 transitions. [2021-07-13 19:19:15,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:15,806 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:15,807 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:16,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1005,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:16,007 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash -533160916, now seen corresponding path program 141 times [2021-07-13 19:19:16,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:16,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393575776] [2021-07-13 19:19:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:16,112 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:16,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:16,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393575776] [2021-07-13 19:19:16,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393575776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:16,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824974789] [2021-07-13 19:19:16,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:16,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-07-13 19:19:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:16,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:19:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:16,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824974789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:16,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:16,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-07-13 19:19:16,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064423420] [2021-07-13 19:19:16,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:19:16,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:16,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:19:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:16,292 INFO L87 Difference]: Start difference. First operand 14909 states and 37832 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:16,716 INFO L93 Difference]: Finished difference Result 17503 states and 42817 transitions. [2021-07-13 19:19:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:19:16,716 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:16,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:16,743 INFO L225 Difference]: With dead ends: 17503 [2021-07-13 19:19:16,743 INFO L226 Difference]: Without dead ends: 17503 [2021-07-13 19:19:16,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:19:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17503 states. [2021-07-13 19:19:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17503 to 14273. [2021-07-13 19:19:16,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 2.5301289237668163) internal successors, (36110), 14272 states have internal predecessors, (36110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36110 transitions. [2021-07-13 19:19:16,972 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36110 transitions. Word has length 59 [2021-07-13 19:19:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:16,972 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36110 transitions. [2021-07-13 19:19:16,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36110 transitions. [2021-07-13 19:19:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:16,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:16,984 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:17,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1006 [2021-07-13 19:19:17,184 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash -539355172, now seen corresponding path program 293 times [2021-07-13 19:19:17,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:17,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041520582] [2021-07-13 19:19:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:17,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:17,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041520582] [2021-07-13 19:19:17,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041520582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:17,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515307569] [2021-07-13 19:19:17,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:17,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 19:19:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:17,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:17,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515307569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:17,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:17,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 19 [2021-07-13 19:19:17,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471989100] [2021-07-13 19:19:17,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:19:17,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:17,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:19:17,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:19:17,425 INFO L87 Difference]: Start difference. First operand 14273 states and 36110 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:17,829 INFO L93 Difference]: Finished difference Result 16871 states and 40798 transitions. [2021-07-13 19:19:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:19:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:17,854 INFO L225 Difference]: With dead ends: 16871 [2021-07-13 19:19:17,854 INFO L226 Difference]: Without dead ends: 16817 [2021-07-13 19:19:17,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 185.0ms TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16817 states. [2021-07-13 19:19:18,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16817 to 14273. [2021-07-13 19:19:18,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 2.529077914798206) internal successors, (36095), 14272 states have internal predecessors, (36095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36095 transitions. [2021-07-13 19:19:18,085 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36095 transitions. Word has length 59 [2021-07-13 19:19:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:18,085 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36095 transitions. [2021-07-13 19:19:18,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36095 transitions. [2021-07-13 19:19:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:18,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:18,097 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:18,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:18,297 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:18,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1196579045, now seen corresponding path program 142 times [2021-07-13 19:19:18,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:18,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939622841] [2021-07-13 19:19:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:18,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:18,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939622841] [2021-07-13 19:19:18,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939622841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:18,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551207617] [2021-07-13 19:19:18,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:18,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:18,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:18,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:18,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:18,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551207617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:18,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:18,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:19:18,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55862376] [2021-07-13 19:19:18,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:19:18,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:18,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:19:18,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:19:18,501 INFO L87 Difference]: Start difference. First operand 14273 states and 36095 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:19,060 INFO L93 Difference]: Finished difference Result 15978 states and 39441 transitions. [2021-07-13 19:19:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:19:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:19,084 INFO L225 Difference]: With dead ends: 15978 [2021-07-13 19:19:19,084 INFO L226 Difference]: Without dead ends: 15963 [2021-07-13 19:19:19,085 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:19:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15963 states. [2021-07-13 19:19:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15963 to 14540. [2021-07-13 19:19:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14540 states, 14539 states have (on average 2.5258958662906665) internal successors, (36724), 14539 states have internal predecessors, (36724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36724 transitions. [2021-07-13 19:19:19,314 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36724 transitions. Word has length 59 [2021-07-13 19:19:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:19,315 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36724 transitions. [2021-07-13 19:19:19,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36724 transitions. [2021-07-13 19:19:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:19,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:19,327 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:19,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-07-13 19:19:19,527 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1751753960, now seen corresponding path program 294 times [2021-07-13 19:19:19,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:19,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611076908] [2021-07-13 19:19:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:19,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:19:19,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:19,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611076908] [2021-07-13 19:19:19,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611076908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:19,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872939295] [2021-07-13 19:19:19,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:19,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 19:19:19,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:19,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:19,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:19:19,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872939295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:19,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:19,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:19:19,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693094900] [2021-07-13 19:19:19,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:19:19,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:19,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:19:19,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:19:19,705 INFO L87 Difference]: Start difference. First operand 14540 states and 36724 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:19,903 INFO L93 Difference]: Finished difference Result 17442 states and 41946 transitions. [2021-07-13 19:19:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:19:19,903 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:19,928 INFO L225 Difference]: With dead ends: 17442 [2021-07-13 19:19:19,928 INFO L226 Difference]: Without dead ends: 17424 [2021-07-13 19:19:19,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17424 states. [2021-07-13 19:19:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17424 to 14540. [2021-07-13 19:19:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14540 states, 14539 states have (on average 2.5246578169062524) internal successors, (36706), 14539 states have internal predecessors, (36706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:20,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36706 transitions. [2021-07-13 19:19:20,159 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36706 transitions. Word has length 59 [2021-07-13 19:19:20,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:20,159 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36706 transitions. [2021-07-13 19:19:20,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36706 transitions. [2021-07-13 19:19:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:20,171 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:20,171 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:20,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:20,372 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:20,372 INFO L82 PathProgramCache]: Analyzing trace with hash 303753947, now seen corresponding path program 295 times [2021-07-13 19:19:20,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:20,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196534066] [2021-07-13 19:19:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:20,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:20,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196534066] [2021-07-13 19:19:20,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196534066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:20,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735472227] [2021-07-13 19:19:20,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:20,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:20,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:20,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735472227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:20,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:20,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:19:20,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724679364] [2021-07-13 19:19:20,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:19:20,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:19:20,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:19:20,578 INFO L87 Difference]: Start difference. First operand 14540 states and 36706 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:21,249 INFO L93 Difference]: Finished difference Result 15609 states and 38572 transitions. [2021-07-13 19:19:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:19:21,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:21,274 INFO L225 Difference]: With dead ends: 15609 [2021-07-13 19:19:21,274 INFO L226 Difference]: Without dead ends: 15481 [2021-07-13 19:19:21,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:19:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15481 states. [2021-07-13 19:19:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15481 to 14586. [2021-07-13 19:19:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14586 states, 14585 states have (on average 2.5154610901611245) internal successors, (36688), 14585 states have internal predecessors, (36688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14586 states to 14586 states and 36688 transitions. [2021-07-13 19:19:21,521 INFO L78 Accepts]: Start accepts. Automaton has 14586 states and 36688 transitions. Word has length 59 [2021-07-13 19:19:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:21,521 INFO L482 AbstractCegarLoop]: Abstraction has 14586 states and 36688 transitions. [2021-07-13 19:19:21,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 14586 states and 36688 transitions. [2021-07-13 19:19:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:21,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:21,533 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:21,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:21,734 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:21,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:21,734 INFO L82 PathProgramCache]: Analyzing trace with hash -309782233, now seen corresponding path program 296 times [2021-07-13 19:19:21,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:21,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083389680] [2021-07-13 19:19:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:19:21,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:21,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083389680] [2021-07-13 19:19:21,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083389680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:21,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878540889] [2021-07-13 19:19:21,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:21,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:21,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:21,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:21,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:19:21,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878540889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:21,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:21,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:19:21,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867760378] [2021-07-13 19:19:21,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:19:21,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:21,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:19:21,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:19:21,954 INFO L87 Difference]: Start difference. First operand 14586 states and 36688 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:22,478 INFO L93 Difference]: Finished difference Result 16298 states and 40065 transitions. [2021-07-13 19:19:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:19:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:22,504 INFO L225 Difference]: With dead ends: 16298 [2021-07-13 19:19:22,505 INFO L226 Difference]: Without dead ends: 16286 [2021-07-13 19:19:22,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:19:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16286 states. [2021-07-13 19:19:22,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16286 to 14730. [2021-07-13 19:19:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 2.5157172924163214) internal successors, (37054), 14729 states have internal predecessors, (37054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 37054 transitions. [2021-07-13 19:19:22,737 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 37054 transitions. Word has length 59 [2021-07-13 19:19:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:22,737 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 37054 transitions. [2021-07-13 19:19:22,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 37054 transitions. [2021-07-13 19:19:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:22,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:22,750 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:22,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-07-13 19:19:22,950 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1832135101, now seen corresponding path program 297 times [2021-07-13 19:19:22,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:22,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886566924] [2021-07-13 19:19:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:23,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:23,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886566924] [2021-07-13 19:19:23,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886566924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:23,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266019275] [2021-07-13 19:19:23,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:23,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:19:23,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:23,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:23,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:23,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266019275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:23,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:23,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:19:23,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018337360] [2021-07-13 19:19:23,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:19:23,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:23,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:19:23,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:19:23,151 INFO L87 Difference]: Start difference. First operand 14730 states and 37054 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:23,945 INFO L93 Difference]: Finished difference Result 18459 states and 44889 transitions. [2021-07-13 19:19:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:19:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:23,974 INFO L225 Difference]: With dead ends: 18459 [2021-07-13 19:19:23,974 INFO L226 Difference]: Without dead ends: 18405 [2021-07-13 19:19:23,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:19:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-07-13 19:19:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 15161. [2021-07-13 19:19:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 2.5215039577836413) internal successors, (38226), 15160 states have internal predecessors, (38226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38226 transitions. [2021-07-13 19:19:24,252 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38226 transitions. Word has length 59 [2021-07-13 19:19:24,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:24,253 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38226 transitions. [2021-07-13 19:19:24,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38226 transitions. [2021-07-13 19:19:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:24,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:24,265 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:24,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-07-13 19:19:24,465 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:24,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:24,466 INFO L82 PathProgramCache]: Analyzing trace with hash -930273086, now seen corresponding path program 298 times [2021-07-13 19:19:24,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:24,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037031901] [2021-07-13 19:19:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:24,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:24,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037031901] [2021-07-13 19:19:24,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037031901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:24,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323802722] [2021-07-13 19:19:24,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:24,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:24,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:24,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:24,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:24,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323802722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:24,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:24,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:19:24,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821867094] [2021-07-13 19:19:24,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:19:24,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:24,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:19:24,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:19:24,645 INFO L87 Difference]: Start difference. First operand 15161 states and 38226 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:24,871 INFO L93 Difference]: Finished difference Result 18207 states and 43712 transitions. [2021-07-13 19:19:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:19:24,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:24,898 INFO L225 Difference]: With dead ends: 18207 [2021-07-13 19:19:24,898 INFO L226 Difference]: Without dead ends: 18183 [2021-07-13 19:19:24,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18183 states. [2021-07-13 19:19:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18183 to 15161. [2021-07-13 19:19:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 2.520580474934037) internal successors, (38212), 15160 states have internal predecessors, (38212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38212 transitions. [2021-07-13 19:19:25,152 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38212 transitions. Word has length 59 [2021-07-13 19:19:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:25,152 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38212 transitions. [2021-07-13 19:19:25,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38212 transitions. [2021-07-13 19:19:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:25,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:25,165 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:25,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1024,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:25,366 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:25,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1986971635, now seen corresponding path program 299 times [2021-07-13 19:19:25,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:25,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492416660] [2021-07-13 19:19:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:25,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:25,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492416660] [2021-07-13 19:19:25,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492416660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:25,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617002175] [2021-07-13 19:19:25,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:25,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:19:25,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:25,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:25,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:25,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617002175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:25,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:25,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:19:25,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652628987] [2021-07-13 19:19:25,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:25,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:25,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:25,598 INFO L87 Difference]: Start difference. First operand 15161 states and 38212 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:26,751 INFO L93 Difference]: Finished difference Result 23302 states and 55848 transitions. [2021-07-13 19:19:26,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-13 19:19:26,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:26,786 INFO L225 Difference]: With dead ends: 23302 [2021-07-13 19:19:26,786 INFO L226 Difference]: Without dead ends: 23134 [2021-07-13 19:19:26,787 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:19:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2021-07-13 19:19:27,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 16060. [2021-07-13 19:19:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16060 states, 16059 states have (on average 2.526745127342923) internal successors, (40577), 16059 states have internal predecessors, (40577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40577 transitions. [2021-07-13 19:19:27,114 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40577 transitions. Word has length 59 [2021-07-13 19:19:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:27,114 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40577 transitions. [2021-07-13 19:19:27,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:27,114 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40577 transitions. [2021-07-13 19:19:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:27,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:27,126 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:27,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-07-13 19:19:27,327 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:27,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:27,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1921392984, now seen corresponding path program 300 times [2021-07-13 19:19:27,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:27,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867749614] [2021-07-13 19:19:27,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:27,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:27,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867749614] [2021-07-13 19:19:27,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867749614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:27,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028886328] [2021-07-13 19:19:27,417 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:27,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 19:19:27,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:27,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:27,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:27,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028886328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:27,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:27,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:19:27,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091519962] [2021-07-13 19:19:27,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:27,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:27,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:27,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:27,527 INFO L87 Difference]: Start difference. First operand 16060 states and 40577 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:27,756 INFO L93 Difference]: Finished difference Result 19290 states and 46411 transitions. [2021-07-13 19:19:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:19:27,756 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:27,785 INFO L225 Difference]: With dead ends: 19290 [2021-07-13 19:19:27,785 INFO L226 Difference]: Without dead ends: 19257 [2021-07-13 19:19:27,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:19:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19257 states. [2021-07-13 19:19:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19257 to 16060. [2021-07-13 19:19:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16060 states, 16059 states have (on average 2.5261846939410924) internal successors, (40568), 16059 states have internal predecessors, (40568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40568 transitions. [2021-07-13 19:19:28,056 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40568 transitions. Word has length 59 [2021-07-13 19:19:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:28,056 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40568 transitions. [2021-07-13 19:19:28,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40568 transitions. [2021-07-13 19:19:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:28,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:28,069 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:28,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:28,270 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:28,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:28,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1927280125, now seen corresponding path program 301 times [2021-07-13 19:19:28,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:28,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256665040] [2021-07-13 19:19:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:28,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:28,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256665040] [2021-07-13 19:19:28,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256665040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:28,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678002424] [2021-07-13 19:19:28,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:28,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:28,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678002424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:28,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:28,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:19:28,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040783280] [2021-07-13 19:19:28,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:28,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:28,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:28,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:28,487 INFO L87 Difference]: Start difference. First operand 16060 states and 40568 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:30,354 INFO L93 Difference]: Finished difference Result 33633 states and 79425 transitions. [2021-07-13 19:19:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-13 19:19:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:30,408 INFO L225 Difference]: With dead ends: 33633 [2021-07-13 19:19:30,409 INFO L226 Difference]: Without dead ends: 33177 [2021-07-13 19:19:30,409 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 1010.1ms TimeCoverageRelationStatistics Valid=813, Invalid=8499, Unknown=0, NotChecked=0, Total=9312 [2021-07-13 19:19:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33177 states. [2021-07-13 19:19:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33177 to 17660. [2021-07-13 19:19:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17660 states, 17659 states have (on average 2.532532986012798) internal successors, (44722), 17659 states have internal predecessors, (44722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44722 transitions. [2021-07-13 19:19:30,804 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44722 transitions. Word has length 59 [2021-07-13 19:19:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:30,804 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44722 transitions. [2021-07-13 19:19:30,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:30,804 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44722 transitions. [2021-07-13 19:19:30,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:30,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:30,817 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:31,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-07-13 19:19:31,017 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:31,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:31,018 INFO L82 PathProgramCache]: Analyzing trace with hash -474114302, now seen corresponding path program 302 times [2021-07-13 19:19:31,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:31,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769782477] [2021-07-13 19:19:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:31,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:31,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769782477] [2021-07-13 19:19:31,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769782477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:31,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76085560] [2021-07-13 19:19:31,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:31,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:31,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:31,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:31,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76085560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:31,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:31,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:19:31,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056650397] [2021-07-13 19:19:31,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:31,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:31,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:31,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:31,216 INFO L87 Difference]: Start difference. First operand 17660 states and 44722 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:31,450 INFO L93 Difference]: Finished difference Result 21199 states and 51145 transitions. [2021-07-13 19:19:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:19:31,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:31,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:31,483 INFO L225 Difference]: With dead ends: 21199 [2021-07-13 19:19:31,483 INFO L226 Difference]: Without dead ends: 21157 [2021-07-13 19:19:31,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:19:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21157 states. [2021-07-13 19:19:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21157 to 17660. [2021-07-13 19:19:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17660 states, 17659 states have (on average 2.532023330879438) internal successors, (44713), 17659 states have internal predecessors, (44713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44713 transitions. [2021-07-13 19:19:31,782 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44713 transitions. Word has length 59 [2021-07-13 19:19:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:31,782 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44713 transitions. [2021-07-13 19:19:31,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44713 transitions. [2021-07-13 19:19:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:31,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:31,795 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:31,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-07-13 19:19:31,995 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:31,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:31,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1773966259, now seen corresponding path program 303 times [2021-07-13 19:19:31,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:31,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342993719] [2021-07-13 19:19:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:32,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:32,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342993719] [2021-07-13 19:19:32,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342993719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:32,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453443968] [2021-07-13 19:19:32,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:32,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 19:19:32,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:32,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:32,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:32,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453443968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:32,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:32,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:19:32,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570533260] [2021-07-13 19:19:32,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:32,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:32,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:32,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:32,302 INFO L87 Difference]: Start difference. First operand 17660 states and 44713 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:35,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:35,326 INFO L93 Difference]: Finished difference Result 57125 states and 132657 transitions. [2021-07-13 19:19:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-07-13 19:19:35,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:35,439 INFO L225 Difference]: With dead ends: 57125 [2021-07-13 19:19:35,439 INFO L226 Difference]: Without dead ends: 55739 [2021-07-13 19:19:35,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 2024.5ms TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2021-07-13 19:19:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55739 states. [2021-07-13 19:19:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55739 to 20191. [2021-07-13 19:19:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20191 states, 20190 states have (on average 2.5379891035165922) internal successors, (51242), 20190 states have internal predecessors, (51242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51242 transitions. [2021-07-13 19:19:36,091 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51242 transitions. Word has length 59 [2021-07-13 19:19:36,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:36,091 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51242 transitions. [2021-07-13 19:19:36,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:36,092 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51242 transitions. [2021-07-13 19:19:36,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:36,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:36,105 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:36,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:36,305 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:36,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:36,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583384, now seen corresponding path program 304 times [2021-07-13 19:19:36,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:36,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732589826] [2021-07-13 19:19:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:36,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:36,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732589826] [2021-07-13 19:19:36,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732589826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:36,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423975302] [2021-07-13 19:19:36,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:36,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:36,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:36,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:36,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:36,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423975302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:36,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:36,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:19:36,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619662291] [2021-07-13 19:19:36,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:36,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:36,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:36,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:36,518 INFO L87 Difference]: Start difference. First operand 20191 states and 51242 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:36,818 INFO L93 Difference]: Finished difference Result 24224 states and 58607 transitions. [2021-07-13 19:19:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:19:36,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:36,861 INFO L225 Difference]: With dead ends: 24224 [2021-07-13 19:19:36,861 INFO L226 Difference]: Without dead ends: 24173 [2021-07-13 19:19:36,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:19:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24173 states. [2021-07-13 19:19:37,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24173 to 20191. [2021-07-13 19:19:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20191 states, 20190 states have (on average 2.53754333828628) internal successors, (51233), 20190 states have internal predecessors, (51233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51233 transitions. [2021-07-13 19:19:37,223 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51233 transitions. Word has length 59 [2021-07-13 19:19:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:37,223 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51233 transitions. [2021-07-13 19:19:37,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51233 transitions. [2021-07-13 19:19:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:37,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:37,237 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:37,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:37,438 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash -49180099, now seen corresponding path program 305 times [2021-07-13 19:19:37,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:37,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927504478] [2021-07-13 19:19:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:37,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:37,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927504478] [2021-07-13 19:19:37,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927504478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:37,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592463072] [2021-07-13 19:19:37,568 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:37,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:19:37,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:37,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:37,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:37,811 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-13 19:19:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:19:37,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592463072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:37,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:37,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:19:37,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570654964] [2021-07-13 19:19:37,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:37,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:37,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:37,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:37,844 INFO L87 Difference]: Start difference. First operand 20191 states and 51233 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:42,852 INFO L93 Difference]: Finished difference Result 72936 states and 170877 transitions. [2021-07-13 19:19:42,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-07-13 19:19:42,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:42,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:43,004 INFO L225 Difference]: With dead ends: 72936 [2021-07-13 19:19:43,005 INFO L226 Difference]: Without dead ends: 71616 [2021-07-13 19:19:43,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29073 ImplicationChecksByTransitivity, 3788.9ms TimeCoverageRelationStatistics Valid=4377, Invalid=61415, Unknown=0, NotChecked=0, Total=65792 [2021-07-13 19:19:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71616 states. [2021-07-13 19:19:43,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71616 to 22239. [2021-07-13 19:19:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22239 states, 22238 states have (on average 2.5387624786401655) internal successors, (56457), 22238 states have internal predecessors, (56457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22239 states to 22239 states and 56457 transitions. [2021-07-13 19:19:43,814 INFO L78 Accepts]: Start accepts. Automaton has 22239 states and 56457 transitions. Word has length 59 [2021-07-13 19:19:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:43,814 INFO L482 AbstractCegarLoop]: Abstraction has 22239 states and 56457 transitions. [2021-07-13 19:19:43,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 22239 states and 56457 transitions. [2021-07-13 19:19:43,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:43,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:43,828 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:44,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1049,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:44,029 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:44,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:44,029 INFO L82 PathProgramCache]: Analyzing trace with hash 32658754, now seen corresponding path program 306 times [2021-07-13 19:19:44,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:44,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651689382] [2021-07-13 19:19:44,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:44,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:44,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651689382] [2021-07-13 19:19:44,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651689382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:44,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212455478] [2021-07-13 19:19:44,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:44,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:19:44,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:44,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:44,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:44,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212455478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:44,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:44,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-13 19:19:44,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594968675] [2021-07-13 19:19:44,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:44,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:44,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:44,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:44,475 INFO L87 Difference]: Start difference. First operand 22239 states and 56457 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:44,817 INFO L93 Difference]: Finished difference Result 26451 states and 64189 transitions. [2021-07-13 19:19:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:19:44,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:44,864 INFO L225 Difference]: With dead ends: 26451 [2021-07-13 19:19:44,864 INFO L226 Difference]: Without dead ends: 26391 [2021-07-13 19:19:44,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:19:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-07-13 19:19:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 21958. [2021-07-13 19:19:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21958 states, 21957 states have (on average 2.5370041444641798) internal successors, (55705), 21957 states have internal predecessors, (55705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21958 states to 21958 states and 55705 transitions. [2021-07-13 19:19:45,311 INFO L78 Accepts]: Start accepts. Automaton has 21958 states and 55705 transitions. Word has length 59 [2021-07-13 19:19:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:45,311 INFO L482 AbstractCegarLoop]: Abstraction has 21958 states and 55705 transitions. [2021-07-13 19:19:45,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 21958 states and 55705 transitions. [2021-07-13 19:19:45,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:45,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:45,325 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:45,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:45,525 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash 754093939, now seen corresponding path program 307 times [2021-07-13 19:19:45,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:45,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130697606] [2021-07-13 19:19:45,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:45,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:45,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130697606] [2021-07-13 19:19:45,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130697606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:45,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187940189] [2021-07-13 19:19:45,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:45,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:45,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:45,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187940189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:45,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:45,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-13 19:19:45,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838953309] [2021-07-13 19:19:45,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:19:45,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:45,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:19:45,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:19:45,771 INFO L87 Difference]: Start difference. First operand 21958 states and 55705 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:46,747 INFO L93 Difference]: Finished difference Result 30778 states and 73104 transitions. [2021-07-13 19:19:46,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:19:46,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:46,795 INFO L225 Difference]: With dead ends: 30778 [2021-07-13 19:19:46,795 INFO L226 Difference]: Without dead ends: 28996 [2021-07-13 19:19:46,795 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:19:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2021-07-13 19:19:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 14128. [2021-07-13 19:19:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14128 states, 14127 states have (on average 2.5023713456501735) internal successors, (35351), 14127 states have internal predecessors, (35351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:47,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14128 states to 14128 states and 35351 transitions. [2021-07-13 19:19:47,086 INFO L78 Accepts]: Start accepts. Automaton has 14128 states and 35351 transitions. Word has length 59 [2021-07-13 19:19:47,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:47,086 INFO L482 AbstractCegarLoop]: Abstraction has 14128 states and 35351 transitions. [2021-07-13 19:19:47,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand 14128 states and 35351 transitions. [2021-07-13 19:19:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:47,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:47,097 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:47,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-07-13 19:19:47,298 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:47,298 INFO L82 PathProgramCache]: Analyzing trace with hash 516032422, now seen corresponding path program 143 times [2021-07-13 19:19:47,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:47,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034782872] [2021-07-13 19:19:47,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:47,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:47,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034782872] [2021-07-13 19:19:47,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034782872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:47,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51638964] [2021-07-13 19:19:47,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:47,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:19:47,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:47,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:47,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:47,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51638964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:47,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:47,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-07-13 19:19:47,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338529725] [2021-07-13 19:19:47,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:19:47,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:19:47,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:19:47,532 INFO L87 Difference]: Start difference. First operand 14128 states and 35351 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:47,905 INFO L93 Difference]: Finished difference Result 16812 states and 41038 transitions. [2021-07-13 19:19:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:19:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:47,975 INFO L225 Difference]: With dead ends: 16812 [2021-07-13 19:19:47,976 INFO L226 Difference]: Without dead ends: 16798 [2021-07-13 19:19:47,976 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:19:47,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-07-13 19:19:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 14566. [2021-07-13 19:19:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14566 states, 14565 states have (on average 2.5051150017164434) internal successors, (36487), 14565 states have internal predecessors, (36487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14566 states to 14566 states and 36487 transitions. [2021-07-13 19:19:48,180 INFO L78 Accepts]: Start accepts. Automaton has 14566 states and 36487 transitions. Word has length 59 [2021-07-13 19:19:48,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:48,181 INFO L482 AbstractCegarLoop]: Abstraction has 14566 states and 36487 transitions. [2021-07-13 19:19:48,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 14566 states and 36487 transitions. [2021-07-13 19:19:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:48,193 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:48,193 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:48,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-07-13 19:19:48,393 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:48,394 INFO L82 PathProgramCache]: Analyzing trace with hash -105847988, now seen corresponding path program 144 times [2021-07-13 19:19:48,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:48,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602378686] [2021-07-13 19:19:48,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:48,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:48,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602378686] [2021-07-13 19:19:48,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602378686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:48,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273513427] [2021-07-13 19:19:48,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:48,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-13 19:19:48,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:48,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:48,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:48,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273513427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:48,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:48,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:19:48,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417600334] [2021-07-13 19:19:48,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:19:48,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:48,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:19:48,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:19:48,586 INFO L87 Difference]: Start difference. First operand 14566 states and 36487 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:48,858 INFO L93 Difference]: Finished difference Result 19427 states and 46843 transitions. [2021-07-13 19:19:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:19:48,859 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:48,889 INFO L225 Difference]: With dead ends: 19427 [2021-07-13 19:19:48,890 INFO L226 Difference]: Without dead ends: 19427 [2021-07-13 19:19:48,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:19:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19427 states. [2021-07-13 19:19:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19427 to 14571. [2021-07-13 19:19:49,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14571 states, 14570 states have (on average 2.5052848318462595) internal successors, (36502), 14570 states have internal predecessors, (36502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14571 states to 14571 states and 36502 transitions. [2021-07-13 19:19:49,160 INFO L78 Accepts]: Start accepts. Automaton has 14571 states and 36502 transitions. Word has length 59 [2021-07-13 19:19:49,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:49,160 INFO L482 AbstractCegarLoop]: Abstraction has 14571 states and 36502 transitions. [2021-07-13 19:19:49,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 14571 states and 36502 transitions. [2021-07-13 19:19:49,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:49,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:49,172 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:49,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1061 [2021-07-13 19:19:49,372 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:49,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1743420444, now seen corresponding path program 145 times [2021-07-13 19:19:49,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:49,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741658022] [2021-07-13 19:19:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:49,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:49,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741658022] [2021-07-13 19:19:49,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741658022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:49,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39771815] [2021-07-13 19:19:49,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:49,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:49,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39771815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:49,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:49,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:19:49,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209595233] [2021-07-13 19:19:49,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:19:49,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:49,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:19:49,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:19:49,573 INFO L87 Difference]: Start difference. First operand 14571 states and 36502 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:49,994 INFO L93 Difference]: Finished difference Result 21523 states and 51587 transitions. [2021-07-13 19:19:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:19:49,995 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:50,029 INFO L225 Difference]: With dead ends: 21523 [2021-07-13 19:19:50,029 INFO L226 Difference]: Without dead ends: 21523 [2021-07-13 19:19:50,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:19:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21523 states. [2021-07-13 19:19:50,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21523 to 14590. [2021-07-13 19:19:50,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14590 states, 14589 states have (on average 2.506134759065049) internal successors, (36562), 14589 states have internal predecessors, (36562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14590 states to 14590 states and 36562 transitions. [2021-07-13 19:19:50,296 INFO L78 Accepts]: Start accepts. Automaton has 14590 states and 36562 transitions. Word has length 59 [2021-07-13 19:19:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:50,296 INFO L482 AbstractCegarLoop]: Abstraction has 14590 states and 36562 transitions. [2021-07-13 19:19:50,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14590 states and 36562 transitions. [2021-07-13 19:19:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:50,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:50,309 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:50,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:50,509 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash 861551688, now seen corresponding path program 146 times [2021-07-13 19:19:50,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:50,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393815937] [2021-07-13 19:19:50,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:50,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:50,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393815937] [2021-07-13 19:19:50,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393815937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:50,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899942588] [2021-07-13 19:19:50,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:50,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:50,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:50,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:50,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:50,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899942588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:50,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:50,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:19:50,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355213878] [2021-07-13 19:19:50,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:19:50,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:50,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:19:50,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:19:50,717 INFO L87 Difference]: Start difference. First operand 14590 states and 36562 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:51,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:51,256 INFO L93 Difference]: Finished difference Result 22499 states and 53828 transitions. [2021-07-13 19:19:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:19:51,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:51,292 INFO L225 Difference]: With dead ends: 22499 [2021-07-13 19:19:51,292 INFO L226 Difference]: Without dead ends: 22499 [2021-07-13 19:19:51,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=375, Invalid=617, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:19:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22499 states. [2021-07-13 19:19:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22499 to 14615. [2021-07-13 19:19:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14614 states have (on average 2.507184891200219) internal successors, (36640), 14614 states have internal predecessors, (36640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36640 transitions. [2021-07-13 19:19:51,616 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36640 transitions. Word has length 59 [2021-07-13 19:19:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:51,616 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36640 transitions. [2021-07-13 19:19:51,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36640 transitions. [2021-07-13 19:19:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:51,628 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:51,628 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:51,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:51,829 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash -177735324, now seen corresponding path program 147 times [2021-07-13 19:19:51,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:51,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87124037] [2021-07-13 19:19:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:51,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87124037] [2021-07-13 19:19:51,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87124037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975163130] [2021-07-13 19:19:51,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:51,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 19:19:51,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:51,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:51,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:52,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975163130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:52,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:52,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:19:52,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042139748] [2021-07-13 19:19:52,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:19:52,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:19:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:19:52,054 INFO L87 Difference]: Start difference. First operand 14615 states and 36640 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:52,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:52,617 INFO L93 Difference]: Finished difference Result 22401 states and 53647 transitions. [2021-07-13 19:19:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:19:52,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:52,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:52,652 INFO L225 Difference]: With dead ends: 22401 [2021-07-13 19:19:52,652 INFO L226 Difference]: Without dead ends: 22401 [2021-07-13 19:19:52,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=448, Invalid=742, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:19:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22401 states. [2021-07-13 19:19:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22401 to 14646. [2021-07-13 19:19:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14646 states, 14645 states have (on average 2.508432912256743) internal successors, (36736), 14645 states have internal predecessors, (36736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:52,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14646 states to 14646 states and 36736 transitions. [2021-07-13 19:19:52,980 INFO L78 Accepts]: Start accepts. Automaton has 14646 states and 36736 transitions. Word has length 59 [2021-07-13 19:19:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:52,980 INFO L482 AbstractCegarLoop]: Abstraction has 14646 states and 36736 transitions. [2021-07-13 19:19:52,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 14646 states and 36736 transitions. [2021-07-13 19:19:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:52,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:52,991 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:53,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:53,192 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:53,192 INFO L82 PathProgramCache]: Analyzing trace with hash 842127048, now seen corresponding path program 148 times [2021-07-13 19:19:53,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:53,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692523616] [2021-07-13 19:19:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:53,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:53,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692523616] [2021-07-13 19:19:53,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692523616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:53,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052871866] [2021-07-13 19:19:53,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:53,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:19:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:53,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:53,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:53,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052871866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:53,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:53,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-07-13 19:19:53,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600503955] [2021-07-13 19:19:53,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:19:53,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:19:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:19:53,416 INFO L87 Difference]: Start difference. First operand 14646 states and 36736 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:53,950 INFO L93 Difference]: Finished difference Result 21283 states and 51152 transitions. [2021-07-13 19:19:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:19:53,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:53,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:53,984 INFO L225 Difference]: With dead ends: 21283 [2021-07-13 19:19:53,985 INFO L226 Difference]: Without dead ends: 21283 [2021-07-13 19:19:53,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=473, Invalid=787, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:19:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21283 states. [2021-07-13 19:19:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21283 to 14683. [2021-07-13 19:19:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14683 states, 14682 states have (on average 2.5098760386868273) internal successors, (36850), 14682 states have internal predecessors, (36850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14683 states to 14683 states and 36850 transitions. [2021-07-13 19:19:54,240 INFO L78 Accepts]: Start accepts. Automaton has 14683 states and 36850 transitions. Word has length 59 [2021-07-13 19:19:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:54,240 INFO L482 AbstractCegarLoop]: Abstraction has 14683 states and 36850 transitions. [2021-07-13 19:19:54,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 14683 states and 36850 transitions. [2021-07-13 19:19:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:54,252 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:54,252 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:54,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:54,453 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:54,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:54,453 INFO L82 PathProgramCache]: Analyzing trace with hash 963399396, now seen corresponding path program 149 times [2021-07-13 19:19:54,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:54,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356950716] [2021-07-13 19:19:54,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 112 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:54,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:54,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356950716] [2021-07-13 19:19:54,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356950716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:54,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205919450] [2021-07-13 19:19:54,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:54,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:19:54,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:54,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:54,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205919450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:54,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:54,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-07-13 19:19:54,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635430781] [2021-07-13 19:19:54,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:19:54,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:54,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:19:54,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:19:54,758 INFO L87 Difference]: Start difference. First operand 14683 states and 36850 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:55,531 INFO L93 Difference]: Finished difference Result 19401 states and 46815 transitions. [2021-07-13 19:19:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:19:55,531 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:55,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:55,561 INFO L225 Difference]: With dead ends: 19401 [2021-07-13 19:19:55,561 INFO L226 Difference]: Without dead ends: 19401 [2021-07-13 19:19:55,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=617, Invalid=1189, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:19:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19401 states. [2021-07-13 19:19:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19401 to 14710. [2021-07-13 19:19:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14710 states, 14709 states have (on average 2.5105717587871372) internal successors, (36928), 14709 states have internal predecessors, (36928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14710 states to 14710 states and 36928 transitions. [2021-07-13 19:19:55,840 INFO L78 Accepts]: Start accepts. Automaton has 14710 states and 36928 transitions. Word has length 59 [2021-07-13 19:19:55,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:55,840 INFO L482 AbstractCegarLoop]: Abstraction has 14710 states and 36928 transitions. [2021-07-13 19:19:55,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 14710 states and 36928 transitions. [2021-07-13 19:19:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:55,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:55,852 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:56,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-07-13 19:19:56,052 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:56,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1720422728, now seen corresponding path program 150 times [2021-07-13 19:19:56,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:56,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406424000] [2021-07-13 19:19:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:56,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:56,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406424000] [2021-07-13 19:19:56,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406424000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:56,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731343155] [2021-07-13 19:19:56,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:56,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-13 19:19:56,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:56,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:56,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:56,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731343155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:56,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:56,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2021-07-13 19:19:56,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262437653] [2021-07-13 19:19:56,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:19:56,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:56,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:19:56,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:19:56,307 INFO L87 Difference]: Start difference. First operand 14710 states and 36928 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:56,739 INFO L93 Difference]: Finished difference Result 16916 states and 41381 transitions. [2021-07-13 19:19:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:19:56,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:56,765 INFO L225 Difference]: With dead ends: 16916 [2021-07-13 19:19:56,766 INFO L226 Difference]: Without dead ends: 16916 [2021-07-13 19:19:56,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=347, Invalid=645, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:19:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16916 states. [2021-07-13 19:19:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16916 to 13840. [2021-07-13 19:19:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13840 states, 13839 states have (on average 2.5019148782426477) internal successors, (34624), 13839 states have internal predecessors, (34624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:56,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13840 states to 13840 states and 34624 transitions. [2021-07-13 19:19:56,989 INFO L78 Accepts]: Start accepts. Automaton has 13840 states and 34624 transitions. Word has length 59 [2021-07-13 19:19:56,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:56,989 INFO L482 AbstractCegarLoop]: Abstraction has 13840 states and 34624 transitions. [2021-07-13 19:19:56,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13840 states and 34624 transitions. [2021-07-13 19:19:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:57,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:57,000 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:57,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1067,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:57,201 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1305517528, now seen corresponding path program 308 times [2021-07-13 19:19:57,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:57,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699979120] [2021-07-13 19:19:57,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:57,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:57,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699979120] [2021-07-13 19:19:57,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699979120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:57,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018578324] [2021-07-13 19:19:57,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:57,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:19:57,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:57,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:57,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:57,462 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:19:57,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018578324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:57,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:57,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-13 19:19:57,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434597886] [2021-07-13 19:19:57,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:19:57,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:57,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:19:57,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:19:57,463 INFO L87 Difference]: Start difference. First operand 13840 states and 34624 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:57,781 INFO L93 Difference]: Finished difference Result 16377 states and 39177 transitions. [2021-07-13 19:19:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:19:57,781 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:57,805 INFO L225 Difference]: With dead ends: 16377 [2021-07-13 19:19:57,805 INFO L226 Difference]: Without dead ends: 16314 [2021-07-13 19:19:57,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:19:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16314 states. [2021-07-13 19:19:57,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16314 to 13849. [2021-07-13 19:19:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13849 states, 13848 states have (on average 2.500938763720393) internal successors, (34633), 13848 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13849 states to 13849 states and 34633 transitions. [2021-07-13 19:19:58,018 INFO L78 Accepts]: Start accepts. Automaton has 13849 states and 34633 transitions. Word has length 59 [2021-07-13 19:19:58,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:58,018 INFO L482 AbstractCegarLoop]: Abstraction has 13849 states and 34633 transitions. [2021-07-13 19:19:58,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:58,018 INFO L276 IsEmpty]: Start isEmpty. Operand 13849 states and 34633 transitions. [2021-07-13 19:19:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:58,029 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:58,029 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:58,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-07-13 19:19:58,229 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:58,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:58,230 INFO L82 PathProgramCache]: Analyzing trace with hash -290755390, now seen corresponding path program 309 times [2021-07-13 19:19:58,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:58,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600020186] [2021-07-13 19:19:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:58,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:58,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600020186] [2021-07-13 19:19:58,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600020186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:58,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135834514] [2021-07-13 19:19:58,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:58,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:19:58,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:58,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:19:58,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:58,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135834514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:58,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:58,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-13 19:19:58,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167954554] [2021-07-13 19:19:58,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:19:58,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:58,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:19:58,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:19:58,557 INFO L87 Difference]: Start difference. First operand 13849 states and 34633 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:58,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:58,973 INFO L93 Difference]: Finished difference Result 16221 states and 39411 transitions. [2021-07-13 19:19:58,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:19:58,974 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:19:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:58,998 INFO L225 Difference]: With dead ends: 16221 [2021-07-13 19:19:58,998 INFO L226 Difference]: Without dead ends: 16221 [2021-07-13 19:19:58,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 322.7ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:19:59,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-07-13 19:19:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 13663. [2021-07-13 19:19:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13663 states, 13662 states have (on average 2.506441223832528) internal successors, (34243), 13662 states have internal predecessors, (34243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:59,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13663 states to 13663 states and 34243 transitions. [2021-07-13 19:19:59,212 INFO L78 Accepts]: Start accepts. Automaton has 13663 states and 34243 transitions. Word has length 59 [2021-07-13 19:19:59,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:59,213 INFO L482 AbstractCegarLoop]: Abstraction has 13663 states and 34243 transitions. [2021-07-13 19:19:59,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:59,213 INFO L276 IsEmpty]: Start isEmpty. Operand 13663 states and 34243 transitions. [2021-07-13 19:19:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:19:59,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:59,224 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:59,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-07-13 19:19:59,424 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:59,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1740888523, now seen corresponding path program 151 times [2021-07-13 19:19:59,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:59,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767789904] [2021-07-13 19:19:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:59,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:59,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767789904] [2021-07-13 19:19:59,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767789904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:59,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388698383] [2021-07-13 19:19:59,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:19:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:19:59,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388698383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:59,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:59,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-13 19:19:59,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883461874] [2021-07-13 19:19:59,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:19:59,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:59,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:19:59,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:19:59,678 INFO L87 Difference]: Start difference. First operand 13663 states and 34243 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:00,455 INFO L93 Difference]: Finished difference Result 18431 states and 44151 transitions. [2021-07-13 19:20:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:20:00,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:00,482 INFO L225 Difference]: With dead ends: 18431 [2021-07-13 19:20:00,482 INFO L226 Difference]: Without dead ends: 18317 [2021-07-13 19:20:00,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:20:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18317 states. [2021-07-13 19:20:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18317 to 13282. [2021-07-13 19:20:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 2.505157744145772) internal successors, (33271), 13281 states have internal predecessors, (33271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:00,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33271 transitions. [2021-07-13 19:20:00,719 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33271 transitions. Word has length 59 [2021-07-13 19:20:00,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:00,719 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33271 transitions. [2021-07-13 19:20:00,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33271 transitions. [2021-07-13 19:20:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:00,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:00,731 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:00,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-07-13 19:20:00,947 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:00,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:00,948 INFO L82 PathProgramCache]: Analyzing trace with hash 285880821, now seen corresponding path program 310 times [2021-07-13 19:20:00,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:00,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989755064] [2021-07-13 19:20:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:01,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:01,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989755064] [2021-07-13 19:20:01,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989755064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:01,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246966333] [2021-07-13 19:20:01,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:01,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:01,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:01,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:01,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:01,424 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:01,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246966333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:01,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:01,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-07-13 19:20:01,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700523996] [2021-07-13 19:20:01,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:20:01,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:01,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:20:01,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:20:01,425 INFO L87 Difference]: Start difference. First operand 13282 states and 33271 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:02,457 INFO L93 Difference]: Finished difference Result 13442 states and 33525 transitions. [2021-07-13 19:20:02,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:20:02,457 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:02,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:02,478 INFO L225 Difference]: With dead ends: 13442 [2021-07-13 19:20:02,478 INFO L226 Difference]: Without dead ends: 13362 [2021-07-13 19:20:02,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:20:02,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2021-07-13 19:20:02,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 13282. [2021-07-13 19:20:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 2.5013176718620587) internal successors, (33220), 13281 states have internal predecessors, (33220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33220 transitions. [2021-07-13 19:20:02,808 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33220 transitions. Word has length 59 [2021-07-13 19:20:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:02,808 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33220 transitions. [2021-07-13 19:20:02,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33220 transitions. [2021-07-13 19:20:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:02,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:02,819 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:03,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-07-13 19:20:03,035 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:03,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:03,035 INFO L82 PathProgramCache]: Analyzing trace with hash 233038186, now seen corresponding path program 311 times [2021-07-13 19:20:03,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:03,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601986988] [2021-07-13 19:20:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:03,157 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:03,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601986988] [2021-07-13 19:20:03,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601986988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:03,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79750294] [2021-07-13 19:20:03,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:03,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:20:03,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:03,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:03,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:03,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79750294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:03,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:03,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-07-13 19:20:03,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607101313] [2021-07-13 19:20:03,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:20:03,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:03,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:20:03,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:20:03,364 INFO L87 Difference]: Start difference. First operand 13282 states and 33220 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:04,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:04,053 INFO L93 Difference]: Finished difference Result 16482 states and 39782 transitions. [2021-07-13 19:20:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:20:04,053 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:04,080 INFO L225 Difference]: With dead ends: 16482 [2021-07-13 19:20:04,080 INFO L226 Difference]: Without dead ends: 16482 [2021-07-13 19:20:04,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=499, Invalid=1223, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:20:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2021-07-13 19:20:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 13694. [2021-07-13 19:20:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13694 states, 13693 states have (on average 2.5162491784123273) internal successors, (34455), 13693 states have internal predecessors, (34455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13694 states to 13694 states and 34455 transitions. [2021-07-13 19:20:04,312 INFO L78 Accepts]: Start accepts. Automaton has 13694 states and 34455 transitions. Word has length 59 [2021-07-13 19:20:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:04,312 INFO L482 AbstractCegarLoop]: Abstraction has 13694 states and 34455 transitions. [2021-07-13 19:20:04,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:04,312 INFO L276 IsEmpty]: Start isEmpty. Operand 13694 states and 34455 transitions. [2021-07-13 19:20:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:04,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:04,324 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:04,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:04,524 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:04,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:04,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2141933289, now seen corresponding path program 152 times [2021-07-13 19:20:04,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:04,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702496104] [2021-07-13 19:20:04,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:04,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:04,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702496104] [2021-07-13 19:20:04,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702496104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:04,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51821307] [2021-07-13 19:20:04,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:04,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:04,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:04,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:20:04,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:05,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51821307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:05,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:05,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-13 19:20:05,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800387618] [2021-07-13 19:20:05,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 19:20:05,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:05,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 19:20:05,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:20:05,535 INFO L87 Difference]: Start difference. First operand 13694 states and 34455 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:14,966 INFO L93 Difference]: Finished difference Result 28070 states and 65966 transitions. [2021-07-13 19:20:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-07-13 19:20:14,967 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:15,011 INFO L225 Difference]: With dead ends: 28070 [2021-07-13 19:20:15,012 INFO L226 Difference]: Without dead ends: 27508 [2021-07-13 19:20:15,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23843 ImplicationChecksByTransitivity, 7873.2ms TimeCoverageRelationStatistics Valid=7596, Invalid=53166, Unknown=0, NotChecked=0, Total=60762 [2021-07-13 19:20:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27508 states. [2021-07-13 19:20:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27508 to 13479. [2021-07-13 19:20:15,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 2.5634367116782903) internal successors, (34550), 13478 states have internal predecessors, (34550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34550 transitions. [2021-07-13 19:20:15,322 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34550 transitions. Word has length 59 [2021-07-13 19:20:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:15,323 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34550 transitions. [2021-07-13 19:20:15,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34550 transitions. [2021-07-13 19:20:15,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:15,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:15,334 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:15,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:15,534 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:15,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:15,534 INFO L82 PathProgramCache]: Analyzing trace with hash 229597463, now seen corresponding path program 312 times [2021-07-13 19:20:15,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:15,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251035661] [2021-07-13 19:20:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:15,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:15,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:15,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251035661] [2021-07-13 19:20:15,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251035661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:15,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574054982] [2021-07-13 19:20:15,686 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:15,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:20:15,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:15,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:15,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:15,959 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:15,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574054982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:15,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:15,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-07-13 19:20:15,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878807490] [2021-07-13 19:20:15,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:20:15,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:20:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:15,960 INFO L87 Difference]: Start difference. First operand 13479 states and 34550 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:16,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:16,866 INFO L93 Difference]: Finished difference Result 13564 states and 34688 transitions. [2021-07-13 19:20:16,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:20:16,866 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:16,886 INFO L225 Difference]: With dead ends: 13564 [2021-07-13 19:20:16,887 INFO L226 Difference]: Without dead ends: 13496 [2021-07-13 19:20:16,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13496 states. [2021-07-13 19:20:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13496 to 13479. [2021-07-13 19:20:17,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 2.561210862145719) internal successors, (34520), 13478 states have internal predecessors, (34520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34520 transitions. [2021-07-13 19:20:17,098 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34520 transitions. Word has length 59 [2021-07-13 19:20:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:17,098 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34520 transitions. [2021-07-13 19:20:17,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34520 transitions. [2021-07-13 19:20:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:17,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:17,110 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:17,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:17,310 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:17,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:17,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1178079806, now seen corresponding path program 313 times [2021-07-13 19:20:17,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:17,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64108047] [2021-07-13 19:20:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:17,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:17,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64108047] [2021-07-13 19:20:17,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64108047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:17,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461530612] [2021-07-13 19:20:17,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:17,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:17,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461530612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:17,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:17,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:20:17,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558375954] [2021-07-13 19:20:17,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:20:17,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:17,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:20:17,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:17,540 INFO L87 Difference]: Start difference. First operand 13479 states and 34520 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:17,961 INFO L93 Difference]: Finished difference Result 16700 states and 41187 transitions. [2021-07-13 19:20:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:20:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:18,039 INFO L225 Difference]: With dead ends: 16700 [2021-07-13 19:20:18,039 INFO L226 Difference]: Without dead ends: 16700 [2021-07-13 19:20:18,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:20:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16700 states. [2021-07-13 19:20:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16700 to 14028. [2021-07-13 19:20:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14028 states, 14027 states have (on average 2.578099379767591) internal successors, (36163), 14027 states have internal predecessors, (36163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14028 states to 14028 states and 36163 transitions. [2021-07-13 19:20:18,270 INFO L78 Accepts]: Start accepts. Automaton has 14028 states and 36163 transitions. Word has length 59 [2021-07-13 19:20:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:18,270 INFO L482 AbstractCegarLoop]: Abstraction has 14028 states and 36163 transitions. [2021-07-13 19:20:18,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 14028 states and 36163 transitions. [2021-07-13 19:20:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:18,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:18,282 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:18,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:18,482 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:18,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:18,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1136189813, now seen corresponding path program 153 times [2021-07-13 19:20:18,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:18,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926791310] [2021-07-13 19:20:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:18,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926791310] [2021-07-13 19:20:18,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926791310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:18,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081613268] [2021-07-13 19:20:18,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:18,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:20:18,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:18,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081613268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:18,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:18,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:20:18,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683718492] [2021-07-13 19:20:18,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:20:18,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:18,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:20:18,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:18,719 INFO L87 Difference]: Start difference. First operand 14028 states and 36163 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:19,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:19,424 INFO L93 Difference]: Finished difference Result 19202 states and 47249 transitions. [2021-07-13 19:20:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:20:19,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:19,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:19,454 INFO L225 Difference]: With dead ends: 19202 [2021-07-13 19:20:19,455 INFO L226 Difference]: Without dead ends: 19070 [2021-07-13 19:20:19,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:20:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19070 states. [2021-07-13 19:20:19,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19070 to 13945. [2021-07-13 19:20:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13945 states, 13944 states have (on average 2.57723752151463) internal successors, (35937), 13944 states have internal predecessors, (35937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:19,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35937 transitions. [2021-07-13 19:20:19,710 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35937 transitions. Word has length 59 [2021-07-13 19:20:19,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:19,710 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35937 transitions. [2021-07-13 19:20:19,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35937 transitions. [2021-07-13 19:20:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:19,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:19,721 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:19,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:19,922 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:19,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:19,922 INFO L82 PathProgramCache]: Analyzing trace with hash 656626997, now seen corresponding path program 314 times [2021-07-13 19:20:19,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:19,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200012939] [2021-07-13 19:20:19,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:20,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:20,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200012939] [2021-07-13 19:20:20,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200012939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:20,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364685616] [2021-07-13 19:20:20,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:20,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:20,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:20,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:20,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364685616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:20,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:20,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-13 19:20:20,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209013830] [2021-07-13 19:20:20,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:20:20,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:20:20,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:20:20,272 INFO L87 Difference]: Start difference. First operand 13945 states and 35937 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:21,138 INFO L93 Difference]: Finished difference Result 14171 states and 36291 transitions. [2021-07-13 19:20:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:20:21,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:21,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:21,160 INFO L225 Difference]: With dead ends: 14171 [2021-07-13 19:20:21,160 INFO L226 Difference]: Without dead ends: 14115 [2021-07-13 19:20:21,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:20:21,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2021-07-13 19:20:21,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 13945. [2021-07-13 19:20:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13945 states, 13944 states have (on average 2.5748709122203097) internal successors, (35904), 13944 states have internal predecessors, (35904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35904 transitions. [2021-07-13 19:20:21,385 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35904 transitions. Word has length 59 [2021-07-13 19:20:21,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:21,386 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35904 transitions. [2021-07-13 19:20:21,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:21,386 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35904 transitions. [2021-07-13 19:20:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:21,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:21,397 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:21,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:21,597 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305348, now seen corresponding path program 154 times [2021-07-13 19:20:21,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:21,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571033438] [2021-07-13 19:20:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:20:21,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571033438] [2021-07-13 19:20:21,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571033438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:21,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048677738] [2021-07-13 19:20:21,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:21,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:21,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:21,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:21,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:21,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048677738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:21,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:21,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:20:21,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511177730] [2021-07-13 19:20:21,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:20:21,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:21,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:20:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:21,829 INFO L87 Difference]: Start difference. First operand 13945 states and 35904 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:22,131 INFO L93 Difference]: Finished difference Result 16427 states and 40999 transitions. [2021-07-13 19:20:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:20:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:22,209 INFO L225 Difference]: With dead ends: 16427 [2021-07-13 19:20:22,209 INFO L226 Difference]: Without dead ends: 16325 [2021-07-13 19:20:22,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:20:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-07-13 19:20:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 12866. [2021-07-13 19:20:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12866 states, 12865 states have (on average 2.5769141080450835) internal successors, (33152), 12865 states have internal predecessors, (33152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12866 states to 12866 states and 33152 transitions. [2021-07-13 19:20:22,408 INFO L78 Accepts]: Start accepts. Automaton has 12866 states and 33152 transitions. Word has length 59 [2021-07-13 19:20:22,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:22,408 INFO L482 AbstractCegarLoop]: Abstraction has 12866 states and 33152 transitions. [2021-07-13 19:20:22,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 12866 states and 33152 transitions. [2021-07-13 19:20:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:22,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:22,418 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:22,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1095 [2021-07-13 19:20:22,619 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash -151060374, now seen corresponding path program 315 times [2021-07-13 19:20:22,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:22,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508522623] [2021-07-13 19:20:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:22,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:22,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508522623] [2021-07-13 19:20:22,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508522623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:22,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895311036] [2021-07-13 19:20:22,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:22,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 19:20:22,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:22,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:22,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:22,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895311036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:22,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:22,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:20:22,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13005795] [2021-07-13 19:20:22,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:20:22,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:22,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:20:22,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:20:22,829 INFO L87 Difference]: Start difference. First operand 12866 states and 33152 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:23,124 INFO L93 Difference]: Finished difference Result 16089 states and 39723 transitions. [2021-07-13 19:20:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:20:23,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:23,148 INFO L225 Difference]: With dead ends: 16089 [2021-07-13 19:20:23,149 INFO L226 Difference]: Without dead ends: 16089 [2021-07-13 19:20:23,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-07-13 19:20:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 13293. [2021-07-13 19:20:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13293 states, 13292 states have (on average 2.59043033403551) internal successors, (34432), 13292 states have internal predecessors, (34432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 34432 transitions. [2021-07-13 19:20:23,372 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 34432 transitions. Word has length 59 [2021-07-13 19:20:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:23,372 INFO L482 AbstractCegarLoop]: Abstraction has 13293 states and 34432 transitions. [2021-07-13 19:20:23,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 34432 transitions. [2021-07-13 19:20:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:23,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:23,382 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:23,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-07-13 19:20:23,583 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:23,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:23,583 INFO L82 PathProgramCache]: Analyzing trace with hash 541310423, now seen corresponding path program 155 times [2021-07-13 19:20:23,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:23,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195473449] [2021-07-13 19:20:23,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:23,695 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:23,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:23,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195473449] [2021-07-13 19:20:23,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195473449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:23,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388719939] [2021-07-13 19:20:23,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:23,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:20:23,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:23,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:23,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388719939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:23,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:23,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:20:23,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835500221] [2021-07-13 19:20:23,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:20:23,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:23,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:20:23,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:20:23,807 INFO L87 Difference]: Start difference. First operand 13293 states and 34432 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:24,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:24,480 INFO L93 Difference]: Finished difference Result 17164 states and 42755 transitions. [2021-07-13 19:20:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:20:24,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:24,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:24,507 INFO L225 Difference]: With dead ends: 17164 [2021-07-13 19:20:24,508 INFO L226 Difference]: Without dead ends: 17150 [2021-07-13 19:20:24,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:20:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17150 states. [2021-07-13 19:20:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17150 to 13291. [2021-07-13 19:20:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13291 states, 13290 states have (on average 2.593453724604966) internal successors, (34467), 13290 states have internal predecessors, (34467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34467 transitions. [2021-07-13 19:20:24,737 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34467 transitions. Word has length 59 [2021-07-13 19:20:24,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:24,737 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34467 transitions. [2021-07-13 19:20:24,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:24,737 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34467 transitions. [2021-07-13 19:20:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:24,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:24,748 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:24,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-07-13 19:20:24,948 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:24,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:24,948 INFO L82 PathProgramCache]: Analyzing trace with hash 379258327, now seen corresponding path program 316 times [2021-07-13 19:20:24,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:24,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164464634] [2021-07-13 19:20:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:24,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:25,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164464634] [2021-07-13 19:20:25,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164464634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:25,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101430067] [2021-07-13 19:20:25,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:25,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:25,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101430067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:25,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:25,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-07-13 19:20:25,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833437886] [2021-07-13 19:20:25,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:25,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:25,261 INFO L87 Difference]: Start difference. First operand 13291 states and 34467 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:25,968 INFO L93 Difference]: Finished difference Result 13395 states and 34626 transitions. [2021-07-13 19:20:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:20:25,968 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:25,987 INFO L225 Difference]: With dead ends: 13395 [2021-07-13 19:20:25,987 INFO L226 Difference]: Without dead ends: 13351 [2021-07-13 19:20:25,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13351 states. [2021-07-13 19:20:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13351 to 13291. [2021-07-13 19:20:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13291 states, 13290 states have (on average 2.5927765237020317) internal successors, (34458), 13290 states have internal predecessors, (34458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34458 transitions. [2021-07-13 19:20:26,213 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34458 transitions. Word has length 59 [2021-07-13 19:20:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:26,213 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34458 transitions. [2021-07-13 19:20:26,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34458 transitions. [2021-07-13 19:20:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:26,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:26,224 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:26,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1103,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:26,425 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1601439350, now seen corresponding path program 156 times [2021-07-13 19:20:26,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:26,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121365649] [2021-07-13 19:20:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:26,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:26,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121365649] [2021-07-13 19:20:26,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121365649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:26,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473799217] [2021-07-13 19:20:26,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:26,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:20:26,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:26,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:26,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:26,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473799217] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:26,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:26,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2021-07-13 19:20:26,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32255012] [2021-07-13 19:20:26,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:20:26,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:26,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:20:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:20:26,658 INFO L87 Difference]: Start difference. First operand 13291 states and 34458 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:26,957 INFO L93 Difference]: Finished difference Result 15297 states and 38508 transitions. [2021-07-13 19:20:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:20:26,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:26,986 INFO L225 Difference]: With dead ends: 15297 [2021-07-13 19:20:26,986 INFO L226 Difference]: Without dead ends: 15243 [2021-07-13 19:20:26,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:20:26,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15243 states. [2021-07-13 19:20:27,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15243 to 13345. [2021-07-13 19:20:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13345 states, 13344 states have (on average 2.5953986810551557) internal successors, (34633), 13344 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13345 states to 13345 states and 34633 transitions. [2021-07-13 19:20:27,214 INFO L78 Accepts]: Start accepts. Automaton has 13345 states and 34633 transitions. Word has length 59 [2021-07-13 19:20:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:27,214 INFO L482 AbstractCegarLoop]: Abstraction has 13345 states and 34633 transitions. [2021-07-13 19:20:27,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 13345 states and 34633 transitions. [2021-07-13 19:20:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:27,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:27,225 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:27,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-07-13 19:20:27,425 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash 815345346, now seen corresponding path program 317 times [2021-07-13 19:20:27,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:27,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085399084] [2021-07-13 19:20:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:27,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:27,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085399084] [2021-07-13 19:20:27,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085399084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:27,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716067395] [2021-07-13 19:20:27,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:27,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:20:27,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:27,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716067395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:27,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:27,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 16 [2021-07-13 19:20:27,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139384862] [2021-07-13 19:20:27,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:20:27,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:20:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:20:27,645 INFO L87 Difference]: Start difference. First operand 13345 states and 34633 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:27,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:27,939 INFO L93 Difference]: Finished difference Result 16957 states and 41994 transitions. [2021-07-13 19:20:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:20:27,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:27,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:27,967 INFO L225 Difference]: With dead ends: 16957 [2021-07-13 19:20:27,967 INFO L226 Difference]: Without dead ends: 16957 [2021-07-13 19:20:27,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16957 states. [2021-07-13 19:20:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16957 to 13816. [2021-07-13 19:20:28,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13816 states, 13815 states have (on average 2.607889974665219) internal successors, (36028), 13815 states have internal predecessors, (36028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13816 states to 13816 states and 36028 transitions. [2021-07-13 19:20:28,206 INFO L78 Accepts]: Start accepts. Automaton has 13816 states and 36028 transitions. Word has length 59 [2021-07-13 19:20:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:28,206 INFO L482 AbstractCegarLoop]: Abstraction has 13816 states and 36028 transitions. [2021-07-13 19:20:28,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 13816 states and 36028 transitions. [2021-07-13 19:20:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:28,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:28,217 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:28,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-07-13 19:20:28,418 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034251, now seen corresponding path program 157 times [2021-07-13 19:20:28,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:28,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432404569] [2021-07-13 19:20:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:28,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:28,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432404569] [2021-07-13 19:20:28,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432404569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:28,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667535517] [2021-07-13 19:20:28,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:28,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:28,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:28,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:28,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667535517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:28,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:28,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:20:28,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188717050] [2021-07-13 19:20:28,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:20:28,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:28,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:20:28,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:20:28,624 INFO L87 Difference]: Start difference. First operand 13816 states and 36028 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:29,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:29,242 INFO L93 Difference]: Finished difference Result 16406 states and 41478 transitions. [2021-07-13 19:20:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:20:29,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:29,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:29,266 INFO L225 Difference]: With dead ends: 16406 [2021-07-13 19:20:29,267 INFO L226 Difference]: Without dead ends: 16388 [2021-07-13 19:20:29,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:20:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2021-07-13 19:20:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 13495. [2021-07-13 19:20:29,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 2.6217578182896104) internal successors, (35378), 13494 states have internal predecessors, (35378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35378 transitions. [2021-07-13 19:20:29,480 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35378 transitions. Word has length 59 [2021-07-13 19:20:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:29,480 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35378 transitions. [2021-07-13 19:20:29,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35378 transitions. [2021-07-13 19:20:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:29,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:29,490 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:29,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-07-13 19:20:29,691 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2102925195, now seen corresponding path program 318 times [2021-07-13 19:20:29,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:29,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42607102] [2021-07-13 19:20:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:29,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:29,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42607102] [2021-07-13 19:20:29,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42607102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:29,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591524740] [2021-07-13 19:20:29,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:29,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:20:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:29,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:29,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:30,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591524740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:30,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:30,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-13 19:20:30,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376864719] [2021-07-13 19:20:30,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:20:30,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:30,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:20:30,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:30,050 INFO L87 Difference]: Start difference. First operand 13495 states and 35378 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:30,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:30,520 INFO L93 Difference]: Finished difference Result 13544 states and 35453 transitions. [2021-07-13 19:20:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:20:30,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:30,540 INFO L225 Difference]: With dead ends: 13544 [2021-07-13 19:20:30,540 INFO L226 Difference]: Without dead ends: 13512 [2021-07-13 19:20:30,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:30,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2021-07-13 19:20:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 13495. [2021-07-13 19:20:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 2.621313176226471) internal successors, (35372), 13494 states have internal predecessors, (35372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35372 transitions. [2021-07-13 19:20:30,733 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35372 transitions. Word has length 59 [2021-07-13 19:20:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:30,733 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35372 transitions. [2021-07-13 19:20:30,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35372 transitions. [2021-07-13 19:20:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:30,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:30,744 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:30,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-07-13 19:20:30,945 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:30,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:30,945 INFO L82 PathProgramCache]: Analyzing trace with hash 513630058, now seen corresponding path program 319 times [2021-07-13 19:20:30,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:30,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692388015] [2021-07-13 19:20:30,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 97 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:31,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692388015] [2021-07-13 19:20:31,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692388015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738021649] [2021-07-13 19:20:31,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:31,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:20:31,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:31,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738021649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:31,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:31,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 19:20:31,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039075904] [2021-07-13 19:20:31,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:20:31,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:31,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:20:31,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:20:31,159 INFO L87 Difference]: Start difference. First operand 13495 states and 35372 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:31,403 INFO L93 Difference]: Finished difference Result 16977 states and 42453 transitions. [2021-07-13 19:20:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:20:31,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:31,429 INFO L225 Difference]: With dead ends: 16977 [2021-07-13 19:20:31,429 INFO L226 Difference]: Without dead ends: 16977 [2021-07-13 19:20:31,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16977 states. [2021-07-13 19:20:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16977 to 14002. [2021-07-13 19:20:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14002 states, 14001 states have (on average 2.633454753231912) internal successors, (36871), 14001 states have internal predecessors, (36871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14002 states to 14002 states and 36871 transitions. [2021-07-13 19:20:31,680 INFO L78 Accepts]: Start accepts. Automaton has 14002 states and 36871 transitions. Word has length 59 [2021-07-13 19:20:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:31,680 INFO L482 AbstractCegarLoop]: Abstraction has 14002 states and 36871 transitions. [2021-07-13 19:20:31,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 14002 states and 36871 transitions. [2021-07-13 19:20:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:31,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:31,691 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:31,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1113 [2021-07-13 19:20:31,892 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash -257205609, now seen corresponding path program 158 times [2021-07-13 19:20:31,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:31,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539062723] [2021-07-13 19:20:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:31,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:31,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539062723] [2021-07-13 19:20:31,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539062723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:31,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421858615] [2021-07-13 19:20:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:32,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:32,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:32,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:32,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:32,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421858615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:32,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:32,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:20:32,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366968436] [2021-07-13 19:20:32,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:20:32,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:20:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:20:32,087 INFO L87 Difference]: Start difference. First operand 14002 states and 36871 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:32,624 INFO L93 Difference]: Finished difference Result 15466 states and 39872 transitions. [2021-07-13 19:20:32,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:20:32,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:32,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:32,647 INFO L225 Difference]: With dead ends: 15466 [2021-07-13 19:20:32,647 INFO L226 Difference]: Without dead ends: 15466 [2021-07-13 19:20:32,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:20:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15466 states. [2021-07-13 19:20:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15466 to 14020. [2021-07-13 19:20:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 14019 states have (on average 2.6337113916827164) internal successors, (36922), 14019 states have internal predecessors, (36922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36922 transitions. [2021-07-13 19:20:32,863 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36922 transitions. Word has length 59 [2021-07-13 19:20:32,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:32,863 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36922 transitions. [2021-07-13 19:20:32,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:32,863 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36922 transitions. [2021-07-13 19:20:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:32,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:32,874 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:33,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-07-13 19:20:33,074 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:33,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:33,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1890501993, now seen corresponding path program 320 times [2021-07-13 19:20:33,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:33,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068453478] [2021-07-13 19:20:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:33,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:33,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068453478] [2021-07-13 19:20:33,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068453478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:33,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393203002] [2021-07-13 19:20:33,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:33,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:33,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:33,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:33,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:33,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393203002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:33,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:33,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 19:20:33,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065108451] [2021-07-13 19:20:33,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:20:33,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:33,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:20:33,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:20:33,307 INFO L87 Difference]: Start difference. First operand 14020 states and 36922 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:33,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:33,721 INFO L93 Difference]: Finished difference Result 14088 states and 37021 transitions. [2021-07-13 19:20:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:20:33,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:33,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:33,742 INFO L225 Difference]: With dead ends: 14088 [2021-07-13 19:20:33,742 INFO L226 Difference]: Without dead ends: 14068 [2021-07-13 19:20:33,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:20:33,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14068 states. [2021-07-13 19:20:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14068 to 14020. [2021-07-13 19:20:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 14019 states have (on average 2.6334973963906125) internal successors, (36919), 14019 states have internal predecessors, (36919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:33,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36919 transitions. [2021-07-13 19:20:33,926 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36919 transitions. Word has length 59 [2021-07-13 19:20:33,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:33,926 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36919 transitions. [2021-07-13 19:20:33,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:33,926 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36919 transitions. [2021-07-13 19:20:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:33,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:33,936 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:34,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:34,136 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:34,137 INFO L82 PathProgramCache]: Analyzing trace with hash -336914294, now seen corresponding path program 159 times [2021-07-13 19:20:34,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:34,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317184469] [2021-07-13 19:20:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 77 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:34,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:34,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317184469] [2021-07-13 19:20:34,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317184469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:34,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382116005] [2021-07-13 19:20:34,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:34,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 19:20:34,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:34,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:34,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 78 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:34,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382116005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:34,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:34,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:20:34,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574524592] [2021-07-13 19:20:34,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:20:34,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:34,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:20:34,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:20:34,335 INFO L87 Difference]: Start difference. First operand 14020 states and 36919 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:34,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:34,547 INFO L93 Difference]: Finished difference Result 15125 states and 39073 transitions. [2021-07-13 19:20:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:20:34,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:34,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:34,573 INFO L225 Difference]: With dead ends: 15125 [2021-07-13 19:20:34,573 INFO L226 Difference]: Without dead ends: 15103 [2021-07-13 19:20:34,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:20:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-07-13 19:20:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 13957. [2021-07-13 19:20:34,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13957 states, 13956 states have (on average 2.635640584694755) internal successors, (36783), 13956 states have internal predecessors, (36783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13957 states to 13957 states and 36783 transitions. [2021-07-13 19:20:34,783 INFO L78 Accepts]: Start accepts. Automaton has 13957 states and 36783 transitions. Word has length 59 [2021-07-13 19:20:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:34,783 INFO L482 AbstractCegarLoop]: Abstraction has 13957 states and 36783 transitions. [2021-07-13 19:20:34,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 13957 states and 36783 transitions. [2021-07-13 19:20:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:34,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:34,794 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:34,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:34,994 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:34,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:34,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1535027189, now seen corresponding path program 160 times [2021-07-13 19:20:34,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:34,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675575974] [2021-07-13 19:20:34,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:35,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675575974] [2021-07-13 19:20:35,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675575974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:35,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892143480] [2021-07-13 19:20:35,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:35,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:35,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:35,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:35,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:35,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892143480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:35,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:35,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:20:35,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856486609] [2021-07-13 19:20:35,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:20:35,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:35,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:20:35,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:20:35,198 INFO L87 Difference]: Start difference. First operand 13957 states and 36783 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:35,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:35,785 INFO L93 Difference]: Finished difference Result 14854 states and 38533 transitions. [2021-07-13 19:20:35,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:20:35,785 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:35,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:35,809 INFO L225 Difference]: With dead ends: 14854 [2021-07-13 19:20:35,809 INFO L226 Difference]: Without dead ends: 14846 [2021-07-13 19:20:35,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14846 states. [2021-07-13 19:20:35,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14846 to 14042. [2021-07-13 19:20:36,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14042 states, 14041 states have (on average 2.6336443273271133) internal successors, (36979), 14041 states have internal predecessors, (36979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14042 states to 14042 states and 36979 transitions. [2021-07-13 19:20:36,029 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 36979 transitions. Word has length 59 [2021-07-13 19:20:36,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:36,029 INFO L482 AbstractCegarLoop]: Abstraction has 14042 states and 36979 transitions. [2021-07-13 19:20:36,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 36979 transitions. [2021-07-13 19:20:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:36,040 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:36,040 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:36,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-07-13 19:20:36,240 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:36,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1259607115, now seen corresponding path program 321 times [2021-07-13 19:20:36,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:36,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181761016] [2021-07-13 19:20:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 19 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:36,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:36,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181761016] [2021-07-13 19:20:36,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181761016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:36,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537917588] [2021-07-13 19:20:36,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:36,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:20:36,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:36,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:36,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:36,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537917588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:36,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:36,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-13 19:20:36,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389191990] [2021-07-13 19:20:36,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:20:36,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:20:36,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:20:36,461 INFO L87 Difference]: Start difference. First operand 14042 states and 36979 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:37,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:37,175 INFO L93 Difference]: Finished difference Result 14554 states and 37840 transitions. [2021-07-13 19:20:37,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:20:37,175 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:37,200 INFO L225 Difference]: With dead ends: 14554 [2021-07-13 19:20:37,200 INFO L226 Difference]: Without dead ends: 14403 [2021-07-13 19:20:37,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14403 states. [2021-07-13 19:20:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14403 to 13894. [2021-07-13 19:20:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13894 states, 13893 states have (on average 2.636723529835169) internal successors, (36632), 13893 states have internal predecessors, (36632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13894 states to 13894 states and 36632 transitions. [2021-07-13 19:20:37,476 INFO L78 Accepts]: Start accepts. Automaton has 13894 states and 36632 transitions. Word has length 59 [2021-07-13 19:20:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:37,476 INFO L482 AbstractCegarLoop]: Abstraction has 13894 states and 36632 transitions. [2021-07-13 19:20:37,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:37,476 INFO L276 IsEmpty]: Start isEmpty. Operand 13894 states and 36632 transitions. [2021-07-13 19:20:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:37,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:37,486 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:37,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-07-13 19:20:37,686 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:37,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:37,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1873143295, now seen corresponding path program 322 times [2021-07-13 19:20:37,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:37,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806891084] [2021-07-13 19:20:37,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:20:37,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:37,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806891084] [2021-07-13 19:20:37,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806891084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:37,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743966576] [2021-07-13 19:20:37,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:37,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:37,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:37,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:37,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:20:37,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743966576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:37,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:37,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-13 19:20:37,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872866755] [2021-07-13 19:20:37,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:20:37,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:37,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:20:37,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:20:37,883 INFO L87 Difference]: Start difference. First operand 13894 states and 36632 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:38,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:38,353 INFO L93 Difference]: Finished difference Result 14649 states and 38103 transitions. [2021-07-13 19:20:38,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:20:38,354 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:38,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:38,377 INFO L225 Difference]: With dead ends: 14649 [2021-07-13 19:20:38,377 INFO L226 Difference]: Without dead ends: 14637 [2021-07-13 19:20:38,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14637 states. [2021-07-13 19:20:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14637 to 13896. [2021-07-13 19:20:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13896 states, 13895 states have (on average 2.6366318819719323) internal successors, (36636), 13895 states have internal predecessors, (36636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13896 states to 13896 states and 36636 transitions. [2021-07-13 19:20:38,608 INFO L78 Accepts]: Start accepts. Automaton has 13896 states and 36636 transitions. Word has length 59 [2021-07-13 19:20:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:38,608 INFO L482 AbstractCegarLoop]: Abstraction has 13896 states and 36636 transitions. [2021-07-13 19:20:38,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 13896 states and 36636 transitions. [2021-07-13 19:20:38,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:38,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:38,618 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:38,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-07-13 19:20:38,819 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:38,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:38,819 INFO L82 PathProgramCache]: Analyzing trace with hash 773466498, now seen corresponding path program 323 times [2021-07-13 19:20:38,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:38,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622898782] [2021-07-13 19:20:38,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 75 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:38,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:38,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622898782] [2021-07-13 19:20:38,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622898782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:38,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376221273] [2021-07-13 19:20:38,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:38,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:20:38,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:38,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:20:39,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376221273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:39,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:39,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-13 19:20:39,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88124740] [2021-07-13 19:20:39,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:20:39,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:39,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:20:39,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:20:39,021 INFO L87 Difference]: Start difference. First operand 13896 states and 36636 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:39,222 INFO L93 Difference]: Finished difference Result 16479 states and 41384 transitions. [2021-07-13 19:20:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:20:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:39,246 INFO L225 Difference]: With dead ends: 16479 [2021-07-13 19:20:39,247 INFO L226 Difference]: Without dead ends: 16473 [2021-07-13 19:20:39,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16473 states. [2021-07-13 19:20:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16473 to 13895. [2021-07-13 19:20:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13895 states, 13894 states have (on average 2.6363178350367065) internal successors, (36629), 13894 states have internal predecessors, (36629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 36629 transitions. [2021-07-13 19:20:39,488 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 36629 transitions. Word has length 59 [2021-07-13 19:20:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:39,488 INFO L482 AbstractCegarLoop]: Abstraction has 13895 states and 36629 transitions. [2021-07-13 19:20:39,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 36629 transitions. [2021-07-13 19:20:39,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:39,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:39,499 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:39,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1125,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:39,699 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:39,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:39,699 INFO L82 PathProgramCache]: Analyzing trace with hash 268774039, now seen corresponding path program 324 times [2021-07-13 19:20:39,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:39,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916813757] [2021-07-13 19:20:39,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:39,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:39,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916813757] [2021-07-13 19:20:39,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916813757] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:39,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50977420] [2021-07-13 19:20:39,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:39,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:20:39,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:39,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:39,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:39,907 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:39,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50977420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:39,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:39,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:20:39,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976549632] [2021-07-13 19:20:39,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:20:39,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:39,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:20:39,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:20:39,907 INFO L87 Difference]: Start difference. First operand 13895 states and 36629 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:40,695 INFO L93 Difference]: Finished difference Result 16130 states and 41196 transitions. [2021-07-13 19:20:40,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:20:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:40,719 INFO L225 Difference]: With dead ends: 16130 [2021-07-13 19:20:40,719 INFO L226 Difference]: Without dead ends: 16076 [2021-07-13 19:20:40,720 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:20:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-07-13 19:20:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 14050. [2021-07-13 19:20:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 2.6358459676845327) internal successors, (37031), 14049 states have internal predecessors, (37031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37031 transitions. [2021-07-13 19:20:40,960 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37031 transitions. Word has length 59 [2021-07-13 19:20:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:40,960 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37031 transitions. [2021-07-13 19:20:40,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37031 transitions. [2021-07-13 19:20:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:40,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:40,971 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:41,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1128 [2021-07-13 19:20:41,172 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:41,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1801333148, now seen corresponding path program 325 times [2021-07-13 19:20:41,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:41,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362685391] [2021-07-13 19:20:41,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:41,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:41,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362685391] [2021-07-13 19:20:41,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362685391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:41,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075962892] [2021-07-13 19:20:41,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:41,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:41,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:41,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075962892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:41,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:41,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:20:41,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152283847] [2021-07-13 19:20:41,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:20:41,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:41,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:20:41,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:20:41,440 INFO L87 Difference]: Start difference. First operand 14050 states and 37031 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:41,623 INFO L93 Difference]: Finished difference Result 16536 states and 41568 transitions. [2021-07-13 19:20:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:20:41,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:41,648 INFO L225 Difference]: With dead ends: 16536 [2021-07-13 19:20:41,649 INFO L226 Difference]: Without dead ends: 16518 [2021-07-13 19:20:41,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:20:41,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16518 states. [2021-07-13 19:20:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16518 to 14050. [2021-07-13 19:20:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 2.6353477115808954) internal successors, (37024), 14049 states have internal predecessors, (37024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37024 transitions. [2021-07-13 19:20:41,904 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37024 transitions. Word has length 59 [2021-07-13 19:20:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:41,904 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37024 transitions. [2021-07-13 19:20:41,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:41,904 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37024 transitions. [2021-07-13 19:20:41,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:41,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:41,916 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:42,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1129 [2021-07-13 19:20:42,132 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:42,133 INFO L82 PathProgramCache]: Analyzing trace with hash 423610573, now seen corresponding path program 326 times [2021-07-13 19:20:42,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:42,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401332009] [2021-07-13 19:20:42,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:42,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:42,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401332009] [2021-07-13 19:20:42,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401332009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:42,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950889763] [2021-07-13 19:20:42,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:42,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:42,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:42,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:20:42,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:42,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:20:42,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:20:42,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:20:42,396 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:20:42,396 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:20:42,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:20:42,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:20:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:42,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950889763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:42,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:42,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-07-13 19:20:42,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352223243] [2021-07-13 19:20:42,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:20:42,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:20:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:20:42,403 INFO L87 Difference]: Start difference. First operand 14050 states and 37024 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:43,635 INFO L93 Difference]: Finished difference Result 19628 states and 48599 transitions. [2021-07-13 19:20:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 19:20:43,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:43,667 INFO L225 Difference]: With dead ends: 19628 [2021-07-13 19:20:43,667 INFO L226 Difference]: Without dead ends: 19460 [2021-07-13 19:20:43,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2021-07-13 19:20:43,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19460 states. [2021-07-13 19:20:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19460 to 14519. [2021-07-13 19:20:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14519 states, 14518 states have (on average 2.627910180465629) internal successors, (38152), 14518 states have internal predecessors, (38152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:43,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38152 transitions. [2021-07-13 19:20:43,946 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38152 transitions. Word has length 59 [2021-07-13 19:20:43,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:43,946 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38152 transitions. [2021-07-13 19:20:43,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:43,946 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38152 transitions. [2021-07-13 19:20:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:43,959 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:43,959 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:44,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1133 [2021-07-13 19:20:44,173 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash 810213250, now seen corresponding path program 327 times [2021-07-13 19:20:44,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:44,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304455670] [2021-07-13 19:20:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:44,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:44,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304455670] [2021-07-13 19:20:44,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304455670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:44,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581105268] [2021-07-13 19:20:44,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:44,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:20:44,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:44,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:44,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:44,374 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:44,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581105268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:44,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:44,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:20:44,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594213143] [2021-07-13 19:20:44,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:20:44,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:44,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:20:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:20:44,375 INFO L87 Difference]: Start difference. First operand 14519 states and 38152 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:44,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:44,591 INFO L93 Difference]: Finished difference Result 17127 states and 42923 transitions. [2021-07-13 19:20:44,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:20:44,591 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:44,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:44,621 INFO L225 Difference]: With dead ends: 17127 [2021-07-13 19:20:44,622 INFO L226 Difference]: Without dead ends: 17100 [2021-07-13 19:20:44,622 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:20:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17100 states. [2021-07-13 19:20:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17100 to 14519. [2021-07-13 19:20:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14519 states, 14518 states have (on average 2.6277035404325666) internal successors, (38149), 14518 states have internal predecessors, (38149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38149 transitions. [2021-07-13 19:20:44,950 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38149 transitions. Word has length 59 [2021-07-13 19:20:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:44,950 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38149 transitions. [2021-07-13 19:20:44,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38149 transitions. [2021-07-13 19:20:44,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:44,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:44,961 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:45,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-07-13 19:20:45,161 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash 363919063, now seen corresponding path program 328 times [2021-07-13 19:20:45,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:45,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188469268] [2021-07-13 19:20:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:45,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:45,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188469268] [2021-07-13 19:20:45,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188469268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:45,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664010184] [2021-07-13 19:20:45,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:45,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:20:45,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:45,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:20:45,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:45,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:20:45,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:20:45,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:20:45,430 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:20:45,430 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:20:45,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:20:45,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:20:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:45,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664010184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:45,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:45,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-07-13 19:20:45,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815071540] [2021-07-13 19:20:45,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:20:45,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:45,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:20:45,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:20:45,437 INFO L87 Difference]: Start difference. First operand 14519 states and 38149 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:47,667 INFO L93 Difference]: Finished difference Result 27358 states and 65118 transitions. [2021-07-13 19:20:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-13 19:20:47,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:47,712 INFO L225 Difference]: With dead ends: 27358 [2021-07-13 19:20:47,712 INFO L226 Difference]: Without dead ends: 26914 [2021-07-13 19:20:47,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 1247.9ms TimeCoverageRelationStatistics Valid=969, Invalid=11241, Unknown=0, NotChecked=0, Total=12210 [2021-07-13 19:20:47,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-07-13 19:20:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 15487. [2021-07-13 19:20:48,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15487 states, 15486 states have (on average 2.61139093374661) internal successors, (40440), 15486 states have internal predecessors, (40440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:48,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40440 transitions. [2021-07-13 19:20:48,045 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40440 transitions. Word has length 59 [2021-07-13 19:20:48,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:48,045 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40440 transitions. [2021-07-13 19:20:48,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:48,046 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40440 transitions. [2021-07-13 19:20:48,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:48,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:48,056 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:48,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:48,257 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:48,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:48,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2037475364, now seen corresponding path program 329 times [2021-07-13 19:20:48,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:48,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546505705] [2021-07-13 19:20:48,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:48,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:48,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546505705] [2021-07-13 19:20:48,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546505705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:48,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897703893] [2021-07-13 19:20:48,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:48,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:20:48,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:48,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:48,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:48,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897703893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:48,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:48,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-07-13 19:20:48,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138688261] [2021-07-13 19:20:48,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:20:48,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:48,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:20:48,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:20:48,510 INFO L87 Difference]: Start difference. First operand 15487 states and 40440 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:48,834 INFO L93 Difference]: Finished difference Result 18492 states and 46004 transitions. [2021-07-13 19:20:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:20:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:48,864 INFO L225 Difference]: With dead ends: 18492 [2021-07-13 19:20:48,864 INFO L226 Difference]: Without dead ends: 18456 [2021-07-13 19:20:48,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:20:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18456 states. [2021-07-13 19:20:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18456 to 15487. [2021-07-13 19:20:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15487 states, 15486 states have (on average 2.611197210383572) internal successors, (40437), 15486 states have internal predecessors, (40437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:49,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40437 transitions. [2021-07-13 19:20:49,186 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40437 transitions. Word has length 59 [2021-07-13 19:20:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:49,186 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40437 transitions. [2021-07-13 19:20:49,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40437 transitions. [2021-07-13 19:20:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:49,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:49,197 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:49,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:49,398 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:49,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:49,398 INFO L82 PathProgramCache]: Analyzing trace with hash 210605197, now seen corresponding path program 330 times [2021-07-13 19:20:49,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:49,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997536834] [2021-07-13 19:20:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:49,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:49,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:49,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997536834] [2021-07-13 19:20:49,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997536834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:49,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603727388] [2021-07-13 19:20:49,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:49,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:20:49,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:49,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:20:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:49,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603727388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:49,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:49,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:20:49,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876919330] [2021-07-13 19:20:49,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:20:49,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:49,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:20:49,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:49,638 INFO L87 Difference]: Start difference. First operand 15487 states and 40437 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:53,391 INFO L93 Difference]: Finished difference Result 44514 states and 101971 transitions. [2021-07-13 19:20:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-07-13 19:20:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:53,467 INFO L225 Difference]: With dead ends: 44514 [2021-07-13 19:20:53,468 INFO L226 Difference]: Without dead ends: 43374 [2021-07-13 19:20:53,472 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15415 ImplicationChecksByTransitivity, 2668.9ms TimeCoverageRelationStatistics Valid=2427, Invalid=33863, Unknown=0, NotChecked=0, Total=36290 [2021-07-13 19:20:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43374 states. [2021-07-13 19:20:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43374 to 17204. [2021-07-13 19:20:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 17203 states have (on average 2.5862349590187756) internal successors, (44491), 17203 states have internal predecessors, (44491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44491 transitions. [2021-07-13 19:20:53,972 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44491 transitions. Word has length 59 [2021-07-13 19:20:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:53,972 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44491 transitions. [2021-07-13 19:20:53,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:53,972 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44491 transitions. [2021-07-13 19:20:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:53,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:53,984 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:54,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-07-13 19:20:54,184 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:54,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:54,185 INFO L82 PathProgramCache]: Analyzing trace with hash 960022850, now seen corresponding path program 331 times [2021-07-13 19:20:54,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:54,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913801692] [2021-07-13 19:20:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:54,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:54,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913801692] [2021-07-13 19:20:54,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913801692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:54,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755676277] [2021-07-13 19:20:54,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:54,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:20:54,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:20:54,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755676277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:54,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:54,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:20:54,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232968059] [2021-07-13 19:20:54,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:20:54,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:54,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:20:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:20:54,401 INFO L87 Difference]: Start difference. First operand 17204 states and 44491 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:20:54,654 INFO L93 Difference]: Finished difference Result 20471 states and 50544 transitions. [2021-07-13 19:20:54,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:20:54,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:20:54,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:20:54,687 INFO L225 Difference]: With dead ends: 20471 [2021-07-13 19:20:54,687 INFO L226 Difference]: Without dead ends: 20426 [2021-07-13 19:20:54,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:20:54,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-07-13 19:20:54,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 17204. [2021-07-13 19:20:54,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 17203 states have (on average 2.586060570830669) internal successors, (44488), 17203 states have internal predecessors, (44488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44488 transitions. [2021-07-13 19:20:54,986 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44488 transitions. Word has length 59 [2021-07-13 19:20:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:54,986 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44488 transitions. [2021-07-13 19:20:54,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44488 transitions. [2021-07-13 19:20:54,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:20:54,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:54,997 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:55,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1147,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:55,197 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:55,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1612541161, now seen corresponding path program 332 times [2021-07-13 19:20:55,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:55,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131249116] [2021-07-13 19:20:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:55,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:55,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131249116] [2021-07-13 19:20:55,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131249116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:55,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485389886] [2021-07-13 19:20:55,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:55,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:20:55,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:20:55,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:20:55,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:55,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:20:55,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:20:55,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:20:55,529 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:20:55,529 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:20:55,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:20:55,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:20:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:20:55,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485389886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:55,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:55,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-07-13 19:20:55,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592411594] [2021-07-13 19:20:55,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:20:55,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:55,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:20:55,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:20:55,536 INFO L87 Difference]: Start difference. First operand 17204 states and 44488 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:02,255 INFO L93 Difference]: Finished difference Result 88879 states and 197085 transitions. [2021-07-13 19:21:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-07-13 19:21:02,256 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:21:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:02,417 INFO L225 Difference]: With dead ends: 88879 [2021-07-13 19:21:02,417 INFO L226 Difference]: Without dead ends: 85405 [2021-07-13 19:21:02,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45804 ImplicationChecksByTransitivity, 5141.7ms TimeCoverageRelationStatistics Valid=5829, Invalid=95613, Unknown=0, NotChecked=0, Total=101442 [2021-07-13 19:21:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85405 states. [2021-07-13 19:21:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85405 to 19930. [2021-07-13 19:21:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19930 states, 19929 states have (on average 2.5569270911736663) internal successors, (50957), 19929 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50957 transitions. [2021-07-13 19:21:03,134 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50957 transitions. Word has length 59 [2021-07-13 19:21:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:03,134 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50957 transitions. [2021-07-13 19:21:03,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50957 transitions. [2021-07-13 19:21:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:21:03,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:03,146 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:03,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-07-13 19:21:03,347 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:03,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1530702308, now seen corresponding path program 333 times [2021-07-13 19:21:03,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:03,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107890942] [2021-07-13 19:21:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:03,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:03,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107890942] [2021-07-13 19:21:03,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107890942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:03,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422360964] [2021-07-13 19:21:03,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:03,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:21:03,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:03,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:21:03,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:03,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422360964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:03,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:03,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-13 19:21:03,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414079748] [2021-07-13 19:21:03,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:21:03,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:03,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:21:03,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:21:03,580 INFO L87 Difference]: Start difference. First operand 19930 states and 50957 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:03,891 INFO L93 Difference]: Finished difference Result 23966 states and 58492 transitions. [2021-07-13 19:21:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:21:03,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:21:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:03,930 INFO L225 Difference]: With dead ends: 23966 [2021-07-13 19:21:03,930 INFO L226 Difference]: Without dead ends: 23912 [2021-07-13 19:21:03,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:21:03,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23912 states. [2021-07-13 19:21:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23912 to 19930. [2021-07-13 19:21:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19930 states, 19929 states have (on average 2.5567765567765566) internal successors, (50954), 19929 states have internal predecessors, (50954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:04,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50954 transitions. [2021-07-13 19:21:04,276 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50954 transitions. Word has length 59 [2021-07-13 19:21:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:04,276 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50954 transitions. [2021-07-13 19:21:04,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50954 transitions. [2021-07-13 19:21:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:21:04,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:04,289 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:04,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-07-13 19:21:04,489 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:04,489 INFO L82 PathProgramCache]: Analyzing trace with hash -809267123, now seen corresponding path program 334 times [2021-07-13 19:21:04,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:04,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436869790] [2021-07-13 19:21:04,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:21:04,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:04,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436869790] [2021-07-13 19:21:04,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436869790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:04,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455478312] [2021-07-13 19:21:04,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:04,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:04,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:04,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-13 19:21:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:04,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:21:04,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-13 19:21:04,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:21:04,850 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-13 19:21:04,850 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:21:04,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:21:04,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-13 19:21:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:21:04,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455478312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:04,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:04,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-07-13 19:21:04,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530039734] [2021-07-13 19:21:04,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:21:04,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:21:04,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:21:04,858 INFO L87 Difference]: Start difference. First operand 19930 states and 50954 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:05,422 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-07-13 19:21:08,265 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-07-13 19:21:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:16,868 INFO L93 Difference]: Finished difference Result 96650 states and 218441 transitions. [2021-07-13 19:21:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-07-13 19:21:16,868 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:21:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:17,250 INFO L225 Difference]: With dead ends: 96650 [2021-07-13 19:21:17,250 INFO L226 Difference]: Without dead ends: 93908 [2021-07-13 19:21:17,257 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122443 ImplicationChecksByTransitivity, 10234.0ms TimeCoverageRelationStatistics Valid=13119, Invalid=247491, Unknown=0, NotChecked=0, Total=260610 [2021-07-13 19:21:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93908 states. [2021-07-13 19:21:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93908 to 23705. [2021-07-13 19:21:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23705 states, 23704 states have (on average 2.5331589605129934) internal successors, (60046), 23704 states have internal predecessors, (60046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60046 transitions. [2021-07-13 19:21:18,273 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60046 transitions. Word has length 59 [2021-07-13 19:21:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:18,273 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60046 transitions. [2021-07-13 19:21:18,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60046 transitions. [2021-07-13 19:21:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:21:18,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:18,286 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:18,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1163 [2021-07-13 19:21:18,501 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:18,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1426088706, now seen corresponding path program 335 times [2021-07-13 19:21:18,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:18,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775200630] [2021-07-13 19:21:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:18,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:18,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775200630] [2021-07-13 19:21:18,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775200630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:18,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821036284] [2021-07-13 19:21:18,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:18,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:21:18,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:18,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:21:18,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:18,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821036284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:18,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:18,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 20 [2021-07-13 19:21:18,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237296629] [2021-07-13 19:21:18,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:21:18,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:18,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:21:18,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:18,822 INFO L87 Difference]: Start difference. First operand 23705 states and 60046 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:19,238 INFO L93 Difference]: Finished difference Result 29277 states and 70528 transitions. [2021-07-13 19:21:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:21:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:21:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:19,284 INFO L225 Difference]: With dead ends: 29277 [2021-07-13 19:21:19,284 INFO L226 Difference]: Without dead ends: 29214 [2021-07-13 19:21:19,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:21:19,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29214 states. [2021-07-13 19:21:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29214 to 23705. [2021-07-13 19:21:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23705 states, 23704 states have (on average 2.533032399595005) internal successors, (60043), 23704 states have internal predecessors, (60043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:19,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60043 transitions. [2021-07-13 19:21:19,729 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60043 transitions. Word has length 59 [2021-07-13 19:21:19,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:19,729 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60043 transitions. [2021-07-13 19:21:19,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:19,729 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60043 transitions. [2021-07-13 19:21:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:21:19,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:19,741 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:19,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:19,942 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:19,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:19,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2030174377, now seen corresponding path program 336 times [2021-07-13 19:21:19,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:19,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083814114] [2021-07-13 19:21:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:20,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:20,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083814114] [2021-07-13 19:21:20,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083814114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:20,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061515716] [2021-07-13 19:21:20,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:20,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:21:20,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:20,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-13 19:21:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:20,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061515716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:20,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:20,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-07-13 19:21:20,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294605533] [2021-07-13 19:21:20,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:21:20,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:21:20,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:21:20,222 INFO L87 Difference]: Start difference. First operand 23705 states and 60043 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:21,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:21,228 INFO L93 Difference]: Finished difference Result 33949 states and 78972 transitions. [2021-07-13 19:21:21,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:21:21,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:21:21,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:21,279 INFO L225 Difference]: With dead ends: 33949 [2021-07-13 19:21:21,280 INFO L226 Difference]: Without dead ends: 30265 [2021-07-13 19:21:21,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 496.5ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:21:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30265 states. [2021-07-13 19:21:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30265 to 13219. [2021-07-13 19:21:21,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13219 states, 13218 states have (on average 2.659479497654713) internal successors, (35153), 13218 states have internal predecessors, (35153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13219 states to 13219 states and 35153 transitions. [2021-07-13 19:21:21,562 INFO L78 Accepts]: Start accepts. Automaton has 13219 states and 35153 transitions. Word has length 59 [2021-07-13 19:21:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:21,562 INFO L482 AbstractCegarLoop]: Abstraction has 13219 states and 35153 transitions. [2021-07-13 19:21:21,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 13219 states and 35153 transitions. [2021-07-13 19:21:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:21:21,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:21,571 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:21,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:21,772 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2026731402, now seen corresponding path program 161 times [2021-07-13 19:21:21,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:21,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546180707] [2021-07-13 19:21:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:21,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:21,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546180707] [2021-07-13 19:21:21,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546180707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:21,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638392645] [2021-07-13 19:21:21,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:21,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:21:21,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:21,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:21:21,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:22,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638392645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:22,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:22,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-07-13 19:21:22,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907214090] [2021-07-13 19:21:22,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:21:22,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:21:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:22,025 INFO L87 Difference]: Start difference. First operand 13219 states and 35153 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:22,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:22,519 INFO L93 Difference]: Finished difference Result 15361 states and 39642 transitions. [2021-07-13 19:21:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:21:22,520 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:21:22,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:22,545 INFO L225 Difference]: With dead ends: 15361 [2021-07-13 19:21:22,545 INFO L226 Difference]: Without dead ends: 15347 [2021-07-13 19:21:22,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:21:22,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15347 states. [2021-07-13 19:21:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15347 to 13918. [2021-07-13 19:21:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13918 states, 13917 states have (on average 2.6583315369691745) internal successors, (36996), 13917 states have internal predecessors, (36996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 36996 transitions. [2021-07-13 19:21:22,813 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 36996 transitions. Word has length 59 [2021-07-13 19:21:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:22,813 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 36996 transitions. [2021-07-13 19:21:22,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 36996 transitions. [2021-07-13 19:21:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:21:22,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:22,824 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:23,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:23,025 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:23,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:23,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1404850992, now seen corresponding path program 162 times [2021-07-13 19:21:23,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:23,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465593601] [2021-07-13 19:21:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:23,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:23,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465593601] [2021-07-13 19:21:23,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465593601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:23,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348770373] [2021-07-13 19:21:23,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:23,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 19:21:23,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:23,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:21:23,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:23,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348770373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:23,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:23,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-13 19:21:23,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640964339] [2021-07-13 19:21:23,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:21:23,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:23,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:21:23,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:21:23,232 INFO L87 Difference]: Start difference. First operand 13918 states and 36996 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:23,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:23,569 INFO L93 Difference]: Finished difference Result 16530 states and 42212 transitions. [2021-07-13 19:21:23,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:21:23,569 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:21:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:23,598 INFO L225 Difference]: With dead ends: 16530 [2021-07-13 19:21:23,599 INFO L226 Difference]: Without dead ends: 16530 [2021-07-13 19:21:23,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-07-13 19:21:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 13921. [2021-07-13 19:21:23,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13921 states, 13920 states have (on average 2.658405172413793) internal successors, (37005), 13920 states have internal predecessors, (37005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:23,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 37005 transitions. [2021-07-13 19:21:23,907 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 37005 transitions. Word has length 59 [2021-07-13 19:21:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:23,907 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 37005 transitions. [2021-07-13 19:21:23,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:23,907 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 37005 transitions. [2021-07-13 19:21:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:21:23,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:23,917 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:24,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1176,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:24,117 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash -232721464, now seen corresponding path program 163 times [2021-07-13 19:21:24,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:24,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699049762] [2021-07-13 19:21:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:24,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:24,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699049762] [2021-07-13 19:21:24,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699049762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:24,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266811396] [2021-07-13 19:21:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:24,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:21:24,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:21:24,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266811396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:24,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:24,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-07-13 19:21:24,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059553979] [2021-07-13 19:21:24,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:21:24,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:24,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:21:24,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:21:24,398 INFO L87 Difference]: Start difference. First operand 13921 states and 37005 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:24,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:24,913 INFO L93 Difference]: Finished difference Result 15683 states and 40328 transitions. [2021-07-13 19:21:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:21:24,913 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:21:24,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:24,939 INFO L225 Difference]: With dead ends: 15683 [2021-07-13 19:21:24,940 INFO L226 Difference]: Without dead ends: 15683 [2021-07-13 19:21:24,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:21:24,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15683 states. [2021-07-13 19:21:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15683 to 13639. [2021-07-13 19:21:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13639 states, 13638 states have (on average 2.6627804663440386) internal successors, (36315), 13638 states have internal predecessors, (36315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13639 states to 13639 states and 36315 transitions. [2021-07-13 19:21:25,192 INFO L78 Accepts]: Start accepts. Automaton has 13639 states and 36315 transitions. Word has length 59 [2021-07-13 19:21:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:25,192 INFO L482 AbstractCegarLoop]: Abstraction has 13639 states and 36315 transitions. [2021-07-13 19:21:25,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 13639 states and 36315 transitions. [2021-07-13 19:21:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-13 19:21:25,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:25,202 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:25,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-07-13 19:21:25,402 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1702913116, now seen corresponding path program 337 times [2021-07-13 19:21:25,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:25,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669647563] [2021-07-13 19:21:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:25,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:25,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669647563] [2021-07-13 19:21:25,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669647563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:25,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415122635] [2021-07-13 19:21:25,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:21:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:25,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415122635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:25,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:25,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-13 19:21:25,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848670774] [2021-07-13 19:21:25,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:21:25,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:25,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:21:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:21:25,654 INFO L87 Difference]: Start difference. First operand 13639 states and 36315 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:26,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:26,050 INFO L93 Difference]: Finished difference Result 15972 states and 40554 transitions. [2021-07-13 19:21:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:21:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-13 19:21:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:26,073 INFO L225 Difference]: With dead ends: 15972 [2021-07-13 19:21:26,073 INFO L226 Difference]: Without dead ends: 15898 [2021-07-13 19:21:26,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:21:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15898 states. [2021-07-13 19:21:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15898 to 13648. [2021-07-13 19:21:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13648 states, 13647 states have (on average 2.6620502674580493) internal successors, (36329), 13647 states have internal predecessors, (36329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:26,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13648 states to 13648 states and 36329 transitions. [2021-07-13 19:21:26,349 INFO L78 Accepts]: Start accepts. Automaton has 13648 states and 36329 transitions. Word has length 59 [2021-07-13 19:21:26,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:26,349 INFO L482 AbstractCegarLoop]: Abstraction has 13648 states and 36329 transitions. [2021-07-13 19:21:26,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:26,349 INFO L276 IsEmpty]: Start isEmpty. Operand 13648 states and 36329 transitions. [2021-07-13 19:21:26,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:21:26,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:26,360 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:26,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:26,560 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:26,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:26,560 INFO L82 PathProgramCache]: Analyzing trace with hash -911313595, now seen corresponding path program 338 times [2021-07-13 19:21:26,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:26,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684141980] [2021-07-13 19:21:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:21:26,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:26,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684141980] [2021-07-13 19:21:26,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684141980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:26,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113287642] [2021-07-13 19:21:26,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:26,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:26,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:26,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:21:26,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 92 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:27,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113287642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:27,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:27,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 28 [2021-07-13 19:21:27,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501484514] [2021-07-13 19:21:27,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:21:27,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:27,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:21:27,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:21:27,117 INFO L87 Difference]: Start difference. First operand 13648 states and 36329 transitions. Second operand has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:28,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:28,943 INFO L93 Difference]: Finished difference Result 17222 states and 43443 transitions. [2021-07-13 19:21:28,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-13 19:21:28,943 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 19:21:28,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:28,968 INFO L225 Difference]: With dead ends: 17222 [2021-07-13 19:21:28,969 INFO L226 Difference]: Without dead ends: 17184 [2021-07-13 19:21:28,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 970.5ms TimeCoverageRelationStatistics Valid=971, Invalid=4141, Unknown=0, NotChecked=0, Total=5112 [2021-07-13 19:21:28,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17184 states. [2021-07-13 19:21:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17184 to 14862. [2021-07-13 19:21:29,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 2.622905591817509) internal successors, (38979), 14861 states have internal predecessors, (38979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 38979 transitions. [2021-07-13 19:21:29,227 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 38979 transitions. Word has length 62 [2021-07-13 19:21:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:29,227 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 38979 transitions. [2021-07-13 19:21:29,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:29,227 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 38979 transitions. [2021-07-13 19:21:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:21:29,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:29,238 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:29,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1190 [2021-07-13 19:21:29,442 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:29,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2125604839, now seen corresponding path program 339 times [2021-07-13 19:21:29,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:29,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518617601] [2021-07-13 19:21:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:29,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:29,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518617601] [2021-07-13 19:21:29,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518617601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:29,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421331519] [2021-07-13 19:21:29,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:29,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 19:21:29,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:29,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:21:29,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:29,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421331519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:29,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:29,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:21:29,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216202629] [2021-07-13 19:21:29,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:21:29,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:21:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:29,620 INFO L87 Difference]: Start difference. First operand 14862 states and 38979 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:30,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:30,074 INFO L93 Difference]: Finished difference Result 16116 states and 41321 transitions. [2021-07-13 19:21:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:21:30,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 19:21:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:30,096 INFO L225 Difference]: With dead ends: 16116 [2021-07-13 19:21:30,096 INFO L226 Difference]: Without dead ends: 16081 [2021-07-13 19:21:30,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16081 states. [2021-07-13 19:21:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16081 to 14880. [2021-07-13 19:21:30,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14880 states, 14879 states have (on average 2.62228644398145) internal successors, (39017), 14879 states have internal predecessors, (39017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 39017 transitions. [2021-07-13 19:21:30,335 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 39017 transitions. Word has length 62 [2021-07-13 19:21:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:30,335 INFO L482 AbstractCegarLoop]: Abstraction has 14880 states and 39017 transitions. [2021-07-13 19:21:30,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 39017 transitions. [2021-07-13 19:21:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:21:30,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:30,347 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:30,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:30,547 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:30,547 INFO L82 PathProgramCache]: Analyzing trace with hash -845583229, now seen corresponding path program 340 times [2021-07-13 19:21:30,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:30,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386792226] [2021-07-13 19:21:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:30,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:30,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386792226] [2021-07-13 19:21:30,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386792226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:30,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913360514] [2021-07-13 19:21:30,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:30,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:30,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:30,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:21:30,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:30,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913360514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:30,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:30,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:21:30,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401246039] [2021-07-13 19:21:30,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:21:30,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:30,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:21:30,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:30,721 INFO L87 Difference]: Start difference. First operand 14880 states and 39017 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:31,128 INFO L93 Difference]: Finished difference Result 16292 states and 41632 transitions. [2021-07-13 19:21:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:21:31,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 19:21:31,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:31,154 INFO L225 Difference]: With dead ends: 16292 [2021-07-13 19:21:31,155 INFO L226 Difference]: Without dead ends: 16254 [2021-07-13 19:21:31,155 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:31,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16254 states. [2021-07-13 19:21:31,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16254 to 14979. [2021-07-13 19:21:31,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14979 states, 14978 states have (on average 2.617038322873548) internal successors, (39198), 14978 states have internal predecessors, (39198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14979 states to 14979 states and 39198 transitions. [2021-07-13 19:21:31,437 INFO L78 Accepts]: Start accepts. Automaton has 14979 states and 39198 transitions. Word has length 62 [2021-07-13 19:21:31,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:31,437 INFO L482 AbstractCegarLoop]: Abstraction has 14979 states and 39198 transitions. [2021-07-13 19:21:31,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 14979 states and 39198 transitions. [2021-07-13 19:21:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:21:31,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:31,448 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:31,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:31,649 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:31,649 INFO L82 PathProgramCache]: Analyzing trace with hash -528313753, now seen corresponding path program 341 times [2021-07-13 19:21:31,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:31,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274896567] [2021-07-13 19:21:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:31,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:31,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274896567] [2021-07-13 19:21:31,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274896567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:31,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876471377] [2021-07-13 19:21:31,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:31,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-13 19:21:31,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:31,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:21:31,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:31,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876471377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:31,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:31,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:21:31,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664863595] [2021-07-13 19:21:31,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:21:31,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:31,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:21:31,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:31,836 INFO L87 Difference]: Start difference. First operand 14979 states and 39198 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:32,267 INFO L93 Difference]: Finished difference Result 16320 states and 41716 transitions. [2021-07-13 19:21:32,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:21:32,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 19:21:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:32,292 INFO L225 Difference]: With dead ends: 16320 [2021-07-13 19:21:32,292 INFO L226 Difference]: Without dead ends: 16260 [2021-07-13 19:21:32,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16260 states. [2021-07-13 19:21:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16260 to 15051. [2021-07-13 19:21:32,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15051 states, 15050 states have (on average 2.613421926910299) internal successors, (39332), 15050 states have internal predecessors, (39332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15051 states to 15051 states and 39332 transitions. [2021-07-13 19:21:32,712 INFO L78 Accepts]: Start accepts. Automaton has 15051 states and 39332 transitions. Word has length 62 [2021-07-13 19:21:32,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:32,712 INFO L482 AbstractCegarLoop]: Abstraction has 15051 states and 39332 transitions. [2021-07-13 19:21:32,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:32,712 INFO L276 IsEmpty]: Start isEmpty. Operand 15051 states and 39332 transitions. [2021-07-13 19:21:32,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:21:32,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:32,723 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:32,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:32,939 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1976372733, now seen corresponding path program 342 times [2021-07-13 19:21:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:32,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301903204] [2021-07-13 19:21:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:33,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:33,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301903204] [2021-07-13 19:21:33,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301903204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:33,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664180838] [2021-07-13 19:21:33,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:33,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 19:21:33,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:33,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:21:33,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 44 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:21:33,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664180838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:33,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:33,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-13 19:21:33,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769301985] [2021-07-13 19:21:33,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:21:33,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:33,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:21:33,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:33,386 INFO L87 Difference]: Start difference. First operand 15051 states and 39332 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:34,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:34,760 INFO L93 Difference]: Finished difference Result 22065 states and 52580 transitions. [2021-07-13 19:21:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:21:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 19:21:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:34,788 INFO L225 Difference]: With dead ends: 22065 [2021-07-13 19:21:34,788 INFO L226 Difference]: Without dead ends: 21976 [2021-07-13 19:21:34,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:21:34,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-07-13 19:21:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 15162. [2021-07-13 19:21:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15162 states, 15161 states have (on average 2.608403139634589) internal successors, (39546), 15161 states have internal predecessors, (39546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15162 states to 15162 states and 39546 transitions. [2021-07-13 19:21:35,059 INFO L78 Accepts]: Start accepts. Automaton has 15162 states and 39546 transitions. Word has length 62 [2021-07-13 19:21:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:35,059 INFO L482 AbstractCegarLoop]: Abstraction has 15162 states and 39546 transitions. [2021-07-13 19:21:35,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 15162 states and 39546 transitions. [2021-07-13 19:21:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:21:35,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:35,071 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:35,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:35,285 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1845042407, now seen corresponding path program 343 times [2021-07-13 19:21:35,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:35,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958837877] [2021-07-13 19:21:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:35,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958837877] [2021-07-13 19:21:35,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958837877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:35,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448600860] [2021-07-13 19:21:35,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:35,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:21:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:35,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448600860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:35,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:35,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:21:35,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732833690] [2021-07-13 19:21:35,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:21:35,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:21:35,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:35,483 INFO L87 Difference]: Start difference. First operand 15162 states and 39546 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:35,891 INFO L93 Difference]: Finished difference Result 16450 states and 42034 transitions. [2021-07-13 19:21:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:21:35,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 19:21:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:35,916 INFO L225 Difference]: With dead ends: 16450 [2021-07-13 19:21:35,916 INFO L226 Difference]: Without dead ends: 16412 [2021-07-13 19:21:35,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:35,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16412 states. [2021-07-13 19:21:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16412 to 15288. [2021-07-13 19:21:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15288 states, 15287 states have (on average 2.6023418590959637) internal successors, (39782), 15287 states have internal predecessors, (39782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15288 states to 15288 states and 39782 transitions. [2021-07-13 19:21:36,263 INFO L78 Accepts]: Start accepts. Automaton has 15288 states and 39782 transitions. Word has length 62 [2021-07-13 19:21:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:36,263 INFO L482 AbstractCegarLoop]: Abstraction has 15288 states and 39782 transitions. [2021-07-13 19:21:36,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:36,263 INFO L276 IsEmpty]: Start isEmpty. Operand 15288 states and 39782 transitions. [2021-07-13 19:21:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:21:36,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:36,276 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:36,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:36,491 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:36,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:36,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1074636925, now seen corresponding path program 344 times [2021-07-13 19:21:36,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:36,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384506229] [2021-07-13 19:21:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:36,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:36,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384506229] [2021-07-13 19:21:36,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384506229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:36,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161911499] [2021-07-13 19:21:36,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:36,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:36,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:36,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:21:36,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 48 proven. 151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:21:36,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161911499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:36,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:36,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-13 19:21:36,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341335327] [2021-07-13 19:21:36,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:21:36,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:36,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:21:36,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:36,792 INFO L87 Difference]: Start difference. First operand 15288 states and 39782 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:38,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:38,176 INFO L93 Difference]: Finished difference Result 22675 states and 53617 transitions. [2021-07-13 19:21:38,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:21:38,177 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 19:21:38,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:38,213 INFO L225 Difference]: With dead ends: 22675 [2021-07-13 19:21:38,213 INFO L226 Difference]: Without dead ends: 22612 [2021-07-13 19:21:38,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 617.0ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:21:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22612 states. [2021-07-13 19:21:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22612 to 15453. [2021-07-13 19:21:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15453 states, 15452 states have (on average 2.595392182241781) internal successors, (40104), 15452 states have internal predecessors, (40104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15453 states to 15453 states and 40104 transitions. [2021-07-13 19:21:38,569 INFO L78 Accepts]: Start accepts. Automaton has 15453 states and 40104 transitions. Word has length 62 [2021-07-13 19:21:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:38,569 INFO L482 AbstractCegarLoop]: Abstraction has 15453 states and 40104 transitions. [2021-07-13 19:21:38,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 15453 states and 40104 transitions. [2021-07-13 19:21:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:21:38,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:38,581 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:38,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:38,782 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:38,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:38,782 INFO L82 PathProgramCache]: Analyzing trace with hash 436062055, now seen corresponding path program 345 times [2021-07-13 19:21:38,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:38,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28202734] [2021-07-13 19:21:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-13 19:21:38,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:38,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28202734] [2021-07-13 19:21:38,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28202734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:38,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101072096] [2021-07-13 19:21:38,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:38,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 19:21:38,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:38,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:21:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 59 proven. 140 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:21:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101072096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:39,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:39,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-13 19:21:39,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320731340] [2021-07-13 19:21:39,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:21:39,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:39,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:21:39,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:21:39,120 INFO L87 Difference]: Start difference. First operand 15453 states and 40104 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:40,439 INFO L93 Difference]: Finished difference Result 23187 states and 55034 transitions. [2021-07-13 19:21:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:21:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 19:21:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:40,475 INFO L225 Difference]: With dead ends: 23187 [2021-07-13 19:21:40,475 INFO L226 Difference]: Without dead ends: 23122 [2021-07-13 19:21:40,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:21:40,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23122 states. [2021-07-13 19:21:40,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23122 to 16198. [2021-07-13 19:21:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16198 states, 16197 states have (on average 2.5986911156386987) internal successors, (42091), 16197 states have internal predecessors, (42091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16198 states to 16198 states and 42091 transitions. [2021-07-13 19:21:40,772 INFO L78 Accepts]: Start accepts. Automaton has 16198 states and 42091 transitions. Word has length 62 [2021-07-13 19:21:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:40,772 INFO L482 AbstractCegarLoop]: Abstraction has 16198 states and 42091 transitions. [2021-07-13 19:21:40,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 16198 states and 42091 transitions. [2021-07-13 19:21:40,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-13 19:21:40,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:40,785 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:40,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:40,985 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:40,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:40,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1292919549, now seen corresponding path program 346 times [2021-07-13 19:21:40,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:40,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346205972] [2021-07-13 19:21:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:21:41,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:41,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346205972] [2021-07-13 19:21:41,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346205972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:41,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588555077] [2021-07-13 19:21:41,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:41,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:21:41,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-13 19:21:41,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:21:41,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588555077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:41,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:41,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-13 19:21:41,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859290785] [2021-07-13 19:21:41,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:21:41,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:41,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:21:41,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:41,157 INFO L87 Difference]: Start difference. First operand 16198 states and 42091 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:21:41,587 INFO L93 Difference]: Finished difference Result 18245 states and 46468 transitions. [2021-07-13 19:21:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:21:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-13 19:21:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:21:41,618 INFO L225 Difference]: With dead ends: 18245 [2021-07-13 19:21:41,618 INFO L226 Difference]: Without dead ends: 18220 [2021-07-13 19:21:41,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:21:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18220 states. [2021-07-13 19:21:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18220 to 16907. [2021-07-13 19:21:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16907 states, 16906 states have (on average 2.594522654678812) internal successors, (43863), 16906 states have internal predecessors, (43863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:41,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16907 states to 16907 states and 43863 transitions. [2021-07-13 19:21:41,878 INFO L78 Accepts]: Start accepts. Automaton has 16907 states and 43863 transitions. Word has length 62 [2021-07-13 19:21:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:21:41,878 INFO L482 AbstractCegarLoop]: Abstraction has 16907 states and 43863 transitions. [2021-07-13 19:21:41,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:21:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 16907 states and 43863 transitions. [2021-07-13 19:21:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:21:41,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:21:41,891 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:21:42,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-07-13 19:21:42,092 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:21:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:21:42,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1959224392, now seen corresponding path program 164 times [2021-07-13 19:21:42,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:21:42,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701609606] [2021-07-13 19:21:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:21:42,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:21:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:42,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:21:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701609606] [2021-07-13 19:21:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701609606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003598714] [2021-07-13 19:21:42,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:21:42,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:21:42,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:21:42,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:21:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:21:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 93 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:21:43,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003598714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:21:43,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:21:43,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-07-13 19:21:43,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228608940] [2021-07-13 19:21:43,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-13 19:21:43,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:21:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-13 19:21:43,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:21:43,360 INFO L87 Difference]: Start difference. First operand 16907 states and 43863 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:05,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:05,356 INFO L93 Difference]: Finished difference Result 40647 states and 93712 transitions. [2021-07-13 19:22:05,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2021-07-13 19:22:05,356 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:05,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:05,433 INFO L225 Difference]: With dead ends: 40647 [2021-07-13 19:22:05,433 INFO L226 Difference]: Without dead ends: 39783 [2021-07-13 19:22:05,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80537 ImplicationChecksByTransitivity, 19362.7ms TimeCoverageRelationStatistics Valid=22109, Invalid=166681, Unknown=0, NotChecked=0, Total=188790 [2021-07-13 19:22:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39783 states. [2021-07-13 19:22:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39783 to 20292. [2021-07-13 19:22:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20292 states, 20291 states have (on average 2.6370311960967916) internal successors, (53508), 20291 states have internal predecessors, (53508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20292 states to 20292 states and 53508 transitions. [2021-07-13 19:22:05,917 INFO L78 Accepts]: Start accepts. Automaton has 20292 states and 53508 transitions. Word has length 65 [2021-07-13 19:22:05,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:05,917 INFO L482 AbstractCegarLoop]: Abstraction has 20292 states and 53508 transitions. [2021-07-13 19:22:05,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 20292 states and 53508 transitions. [2021-07-13 19:22:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:05,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:05,938 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:06,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-07-13 19:22:06,138 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:06,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1290275768, now seen corresponding path program 347 times [2021-07-13 19:22:06,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:06,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181943497] [2021-07-13 19:22:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:06,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:06,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181943497] [2021-07-13 19:22:06,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181943497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:06,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396332256] [2021-07-13 19:22:06,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:06,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 19:22:06,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:06,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396332256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:06,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:06,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-07-13 19:22:06,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919577896] [2021-07-13 19:22:06,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:22:06,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:06,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:22:06,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:22:06,753 INFO L87 Difference]: Start difference. First operand 20292 states and 53508 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:08,305 INFO L93 Difference]: Finished difference Result 20618 states and 54021 transitions. [2021-07-13 19:22:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:08,306 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:08,340 INFO L225 Difference]: With dead ends: 20618 [2021-07-13 19:22:08,340 INFO L226 Difference]: Without dead ends: 20502 [2021-07-13 19:22:08,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 413.5ms TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:22:08,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20502 states. [2021-07-13 19:22:08,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20502 to 20276. [2021-07-13 19:22:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20276 states, 20275 states have (on average 2.635906288532676) internal successors, (53443), 20275 states have internal predecessors, (53443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:08,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20276 states to 20276 states and 53443 transitions. [2021-07-13 19:22:08,707 INFO L78 Accepts]: Start accepts. Automaton has 20276 states and 53443 transitions. Word has length 65 [2021-07-13 19:22:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:08,707 INFO L482 AbstractCegarLoop]: Abstraction has 20276 states and 53443 transitions. [2021-07-13 19:22:08,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 20276 states and 53443 transitions. [2021-07-13 19:22:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:08,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:08,727 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:08,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-07-13 19:22:08,928 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:08,928 INFO L82 PathProgramCache]: Analyzing trace with hash 708589307, now seen corresponding path program 165 times [2021-07-13 19:22:08,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:08,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353616576] [2021-07-13 19:22:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:09,020 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:09,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:09,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353616576] [2021-07-13 19:22:09,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353616576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:09,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138717312] [2021-07-13 19:22:09,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:09,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:22:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:09,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:09,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138717312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:09,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:09,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:22:09,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787384462] [2021-07-13 19:22:09,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:09,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:09,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:09,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:09,143 INFO L87 Difference]: Start difference. First operand 20276 states and 53443 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:09,396 INFO L93 Difference]: Finished difference Result 27245 states and 66968 transitions. [2021-07-13 19:22:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:22:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:09,452 INFO L225 Difference]: With dead ends: 27245 [2021-07-13 19:22:09,452 INFO L226 Difference]: Without dead ends: 27235 [2021-07-13 19:22:09,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:09,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27235 states. [2021-07-13 19:22:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27235 to 20359. [2021-07-13 19:22:09,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20359 states, 20358 states have (on average 2.638324000392966) internal successors, (53711), 20358 states have internal predecessors, (53711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:09,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20359 states to 20359 states and 53711 transitions. [2021-07-13 19:22:09,870 INFO L78 Accepts]: Start accepts. Automaton has 20359 states and 53711 transitions. Word has length 65 [2021-07-13 19:22:09,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:09,870 INFO L482 AbstractCegarLoop]: Abstraction has 20359 states and 53711 transitions. [2021-07-13 19:22:09,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 20359 states and 53711 transitions. [2021-07-13 19:22:09,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:09,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:09,889 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:10,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-07-13 19:22:10,090 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:10,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:10,090 INFO L82 PathProgramCache]: Analyzing trace with hash -248603333, now seen corresponding path program 166 times [2021-07-13 19:22:10,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:10,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882089228] [2021-07-13 19:22:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:10,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:10,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882089228] [2021-07-13 19:22:10,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882089228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:10,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430020186] [2021-07-13 19:22:10,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:10,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:10,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:10,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:10,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430020186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:10,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:10,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:22:10,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113361903] [2021-07-13 19:22:10,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:10,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:10,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:10,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:10,297 INFO L87 Difference]: Start difference. First operand 20359 states and 53711 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:10,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:10,563 INFO L93 Difference]: Finished difference Result 30078 states and 74504 transitions. [2021-07-13 19:22:10,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:22:10,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:10,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:10,620 INFO L225 Difference]: With dead ends: 30078 [2021-07-13 19:22:10,620 INFO L226 Difference]: Without dead ends: 30078 [2021-07-13 19:22:10,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30078 states. [2021-07-13 19:22:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30078 to 22013. [2021-07-13 19:22:11,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22013 states, 22012 states have (on average 2.6694075958568053) internal successors, (58759), 22012 states have internal predecessors, (58759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22013 states to 22013 states and 58759 transitions. [2021-07-13 19:22:11,078 INFO L78 Accepts]: Start accepts. Automaton has 22013 states and 58759 transitions. Word has length 65 [2021-07-13 19:22:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:11,078 INFO L482 AbstractCegarLoop]: Abstraction has 22013 states and 58759 transitions. [2021-07-13 19:22:11,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:11,078 INFO L276 IsEmpty]: Start isEmpty. Operand 22013 states and 58759 transitions. [2021-07-13 19:22:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:11,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:11,098 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:11,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-07-13 19:22:11,298 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:11,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:11,299 INFO L82 PathProgramCache]: Analyzing trace with hash -782468709, now seen corresponding path program 348 times [2021-07-13 19:22:11,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:11,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640073930] [2021-07-13 19:22:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:11,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:11,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640073930] [2021-07-13 19:22:11,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640073930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:11,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273518699] [2021-07-13 19:22:11,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:11,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:22:11,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:11,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:11,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273518699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:11,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:11,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:22:11,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901217033] [2021-07-13 19:22:11,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:11,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:11,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:11,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:11,520 INFO L87 Difference]: Start difference. First operand 22013 states and 58759 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:11,732 INFO L93 Difference]: Finished difference Result 23642 states and 61469 transitions. [2021-07-13 19:22:11,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:22:11,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:11,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:11,774 INFO L225 Difference]: With dead ends: 23642 [2021-07-13 19:22:11,774 INFO L226 Difference]: Without dead ends: 23636 [2021-07-13 19:22:11,774 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23636 states. [2021-07-13 19:22:12,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23636 to 21888. [2021-07-13 19:22:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21888 states, 21887 states have (on average 2.666971261479417) internal successors, (58372), 21887 states have internal predecessors, (58372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21888 states to 21888 states and 58372 transitions. [2021-07-13 19:22:12,197 INFO L78 Accepts]: Start accepts. Automaton has 21888 states and 58372 transitions. Word has length 65 [2021-07-13 19:22:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:12,198 INFO L482 AbstractCegarLoop]: Abstraction has 21888 states and 58372 transitions. [2021-07-13 19:22:12,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:12,198 INFO L276 IsEmpty]: Start isEmpty. Operand 21888 states and 58372 transitions. [2021-07-13 19:22:12,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:12,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:12,218 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:12,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:12,419 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash 855335590, now seen corresponding path program 167 times [2021-07-13 19:22:12,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:12,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391730710] [2021-07-13 19:22:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:12,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:12,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391730710] [2021-07-13 19:22:12,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391730710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:12,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205857749] [2021-07-13 19:22:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:12,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 19:22:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:12,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:12,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205857749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:12,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:12,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:22:12,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538178206] [2021-07-13 19:22:12,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:12,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:12,644 INFO L87 Difference]: Start difference. First operand 21888 states and 58372 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:13,285 INFO L93 Difference]: Finished difference Result 24640 states and 63599 transitions. [2021-07-13 19:22:13,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:13,331 INFO L225 Difference]: With dead ends: 24640 [2021-07-13 19:22:13,332 INFO L226 Difference]: Without dead ends: 24581 [2021-07-13 19:22:13,332 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-07-13 19:22:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 22019. [2021-07-13 19:22:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22019 states, 22018 states have (on average 2.66618221455173) internal successors, (58704), 22018 states have internal predecessors, (58704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22019 states to 22019 states and 58704 transitions. [2021-07-13 19:22:13,828 INFO L78 Accepts]: Start accepts. Automaton has 22019 states and 58704 transitions. Word has length 65 [2021-07-13 19:22:13,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:13,829 INFO L482 AbstractCegarLoop]: Abstraction has 22019 states and 58704 transitions. [2021-07-13 19:22:13,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 22019 states and 58704 transitions. [2021-07-13 19:22:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:13,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:13,848 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:14,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-07-13 19:22:14,048 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash -698361267, now seen corresponding path program 349 times [2021-07-13 19:22:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:14,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909196951] [2021-07-13 19:22:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:14,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:14,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909196951] [2021-07-13 19:22:14,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909196951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:14,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482316891] [2021-07-13 19:22:14,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:14,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:14,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:14,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482316891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:14,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:14,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:22:14,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403860821] [2021-07-13 19:22:14,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:22:14,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:14,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:22:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:22:14,229 INFO L87 Difference]: Start difference. First operand 22019 states and 58704 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:14,476 INFO L93 Difference]: Finished difference Result 25003 states and 63786 transitions. [2021-07-13 19:22:14,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:22:14,477 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:14,523 INFO L225 Difference]: With dead ends: 25003 [2021-07-13 19:22:14,523 INFO L226 Difference]: Without dead ends: 25000 [2021-07-13 19:22:14,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25000 states. [2021-07-13 19:22:14,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25000 to 21981. [2021-07-13 19:22:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21981 states, 21980 states have (on average 2.664649681528662) internal successors, (58569), 21980 states have internal predecessors, (58569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21981 states to 21981 states and 58569 transitions. [2021-07-13 19:22:14,952 INFO L78 Accepts]: Start accepts. Automaton has 21981 states and 58569 transitions. Word has length 65 [2021-07-13 19:22:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:14,952 INFO L482 AbstractCegarLoop]: Abstraction has 21981 states and 58569 transitions. [2021-07-13 19:22:14,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 21981 states and 58569 transitions. [2021-07-13 19:22:14,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:14,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:14,971 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:15,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 567 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-07-13 19:22:15,172 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash -491298701, now seen corresponding path program 350 times [2021-07-13 19:22:15,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:15,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581143567] [2021-07-13 19:22:15,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:15,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:15,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581143567] [2021-07-13 19:22:15,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581143567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:15,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908829574] [2021-07-13 19:22:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:15,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:15,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:15,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:15,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908829574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:15,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:15,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:22:15,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260563179] [2021-07-13 19:22:15,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:15,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:15,360 INFO L87 Difference]: Start difference. First operand 21981 states and 58569 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:15,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:15,667 INFO L93 Difference]: Finished difference Result 24995 states and 63690 transitions. [2021-07-13 19:22:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:22:15,668 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:15,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:15,714 INFO L225 Difference]: With dead ends: 24995 [2021-07-13 19:22:15,714 INFO L226 Difference]: Without dead ends: 24977 [2021-07-13 19:22:15,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:15,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24977 states. [2021-07-13 19:22:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24977 to 21595. [2021-07-13 19:22:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21595 states, 21594 states have (on average 2.658840418634806) internal successors, (57415), 21594 states have internal predecessors, (57415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21595 states to 21595 states and 57415 transitions. [2021-07-13 19:22:16,128 INFO L78 Accepts]: Start accepts. Automaton has 21595 states and 57415 transitions. Word has length 65 [2021-07-13 19:22:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:16,128 INFO L482 AbstractCegarLoop]: Abstraction has 21595 states and 57415 transitions. [2021-07-13 19:22:16,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 21595 states and 57415 transitions. [2021-07-13 19:22:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:16,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:16,148 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:16,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1223 [2021-07-13 19:22:16,348 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1939298714, now seen corresponding path program 351 times [2021-07-13 19:22:16,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:16,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790910981] [2021-07-13 19:22:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:16,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790910981] [2021-07-13 19:22:16,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790910981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39244719] [2021-07-13 19:22:16,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:16,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 19:22:16,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:16,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:16,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39244719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:16,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:16,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:22:16,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068757157] [2021-07-13 19:22:16,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:16,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:16,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:16,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:16,575 INFO L87 Difference]: Start difference. First operand 21595 states and 57415 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:17,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:17,424 INFO L93 Difference]: Finished difference Result 23174 states and 60158 transitions. [2021-07-13 19:22:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:17,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:17,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:17,463 INFO L225 Difference]: With dead ends: 23174 [2021-07-13 19:22:17,463 INFO L226 Difference]: Without dead ends: 23136 [2021-07-13 19:22:17,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2021-07-13 19:22:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 21566. [2021-07-13 19:22:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21566 states, 21565 states have (on average 2.658567122652446) internal successors, (57332), 21565 states have internal predecessors, (57332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21566 states to 21566 states and 57332 transitions. [2021-07-13 19:22:17,866 INFO L78 Accepts]: Start accepts. Automaton has 21566 states and 57332 transitions. Word has length 65 [2021-07-13 19:22:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:17,866 INFO L482 AbstractCegarLoop]: Abstraction has 21566 states and 57332 transitions. [2021-07-13 19:22:17,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:17,866 INFO L276 IsEmpty]: Start isEmpty. Operand 21566 states and 57332 transitions. [2021-07-13 19:22:17,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:17,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:17,887 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:18,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-07-13 19:22:18,088 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1742132402, now seen corresponding path program 352 times [2021-07-13 19:22:18,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:18,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507324401] [2021-07-13 19:22:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:18,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:18,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507324401] [2021-07-13 19:22:18,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507324401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:18,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267688026] [2021-07-13 19:22:18,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:18,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:18,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:18,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:18,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:18,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267688026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:18,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:18,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:22:18,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385599015] [2021-07-13 19:22:18,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:18,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:18,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:18,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:18,323 INFO L87 Difference]: Start difference. First operand 21566 states and 57332 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:19,057 INFO L93 Difference]: Finished difference Result 23637 states and 61214 transitions. [2021-07-13 19:22:19,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:19,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:19,103 INFO L225 Difference]: With dead ends: 23637 [2021-07-13 19:22:19,103 INFO L226 Difference]: Without dead ends: 23625 [2021-07-13 19:22:19,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:19,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23625 states. [2021-07-13 19:22:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23625 to 21570. [2021-07-13 19:22:19,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21570 states, 21569 states have (on average 2.6583059019889657) internal successors, (57337), 21569 states have internal predecessors, (57337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21570 states to 21570 states and 57337 transitions. [2021-07-13 19:22:19,556 INFO L78 Accepts]: Start accepts. Automaton has 21570 states and 57337 transitions. Word has length 65 [2021-07-13 19:22:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:19,556 INFO L482 AbstractCegarLoop]: Abstraction has 21570 states and 57337 transitions. [2021-07-13 19:22:19,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 21570 states and 57337 transitions. [2021-07-13 19:22:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:19,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:19,575 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:19,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:19,776 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:19,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1584832915, now seen corresponding path program 168 times [2021-07-13 19:22:19,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:19,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198647791] [2021-07-13 19:22:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:19,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:19,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198647791] [2021-07-13 19:22:19,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198647791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:19,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455998852] [2021-07-13 19:22:19,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:19,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:22:19,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:19,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:19,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 113 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:19,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455998852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:19,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:19,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 16 [2021-07-13 19:22:19,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662413183] [2021-07-13 19:22:19,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:22:19,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:19,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:22:20,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:20,000 INFO L87 Difference]: Start difference. First operand 21570 states and 57337 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:20,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:20,303 INFO L93 Difference]: Finished difference Result 28789 states and 71294 transitions. [2021-07-13 19:22:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:22:20,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:20,358 INFO L225 Difference]: With dead ends: 28789 [2021-07-13 19:22:20,358 INFO L226 Difference]: Without dead ends: 28769 [2021-07-13 19:22:20,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:22:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28769 states. [2021-07-13 19:22:20,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28769 to 21641. [2021-07-13 19:22:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21641 states, 21640 states have (on average 2.6605822550831792) internal successors, (57575), 21640 states have internal predecessors, (57575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21641 states to 21641 states and 57575 transitions. [2021-07-13 19:22:20,802 INFO L78 Accepts]: Start accepts. Automaton has 21641 states and 57575 transitions. Word has length 65 [2021-07-13 19:22:20,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:20,802 INFO L482 AbstractCegarLoop]: Abstraction has 21641 states and 57575 transitions. [2021-07-13 19:22:20,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 21641 states and 57575 transitions. [2021-07-13 19:22:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:20,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:20,820 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:21,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1228 [2021-07-13 19:22:21,021 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:21,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash -410917560, now seen corresponding path program 353 times [2021-07-13 19:22:21,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:21,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679860469] [2021-07-13 19:22:21,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:21,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:21,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679860469] [2021-07-13 19:22:21,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679860469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:21,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508299625] [2021-07-13 19:22:21,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:21,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:22:21,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:21,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:21,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:21,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508299625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:21,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:21,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:22:21,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661656990] [2021-07-13 19:22:21,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:21,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:21,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:21,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:21,247 INFO L87 Difference]: Start difference. First operand 21641 states and 57575 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:22,018 INFO L93 Difference]: Finished difference Result 24593 states and 63329 transitions. [2021-07-13 19:22:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:22:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:22,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:22,065 INFO L225 Difference]: With dead ends: 24593 [2021-07-13 19:22:22,065 INFO L226 Difference]: Without dead ends: 24581 [2021-07-13 19:22:22,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:22:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-07-13 19:22:22,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 21673. [2021-07-13 19:22:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21673 states, 21672 states have (on average 2.6601605758582503) internal successors, (57651), 21672 states have internal predecessors, (57651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21673 states to 21673 states and 57651 transitions. [2021-07-13 19:22:22,500 INFO L78 Accepts]: Start accepts. Automaton has 21673 states and 57651 transitions. Word has length 65 [2021-07-13 19:22:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:22,500 INFO L482 AbstractCegarLoop]: Abstraction has 21673 states and 57651 transitions. [2021-07-13 19:22:22,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 21673 states and 57651 transitions. [2021-07-13 19:22:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:22,521 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:22,521 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:22,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-07-13 19:22:22,721 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:22,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1270859487, now seen corresponding path program 169 times [2021-07-13 19:22:22,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:22,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219338859] [2021-07-13 19:22:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:22,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:22,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219338859] [2021-07-13 19:22:22,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219338859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:22,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047917166] [2021-07-13 19:22:22,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:22,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:22,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:22,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047917166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:22,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:22,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:22:22,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783426071] [2021-07-13 19:22:22,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:22,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:22,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:22,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:22,934 INFO L87 Difference]: Start difference. First operand 21673 states and 57651 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:23,224 INFO L93 Difference]: Finished difference Result 31661 states and 78137 transitions. [2021-07-13 19:22:23,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:22:23,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:23,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:23,277 INFO L225 Difference]: With dead ends: 31661 [2021-07-13 19:22:23,278 INFO L226 Difference]: Without dead ends: 31661 [2021-07-13 19:22:23,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31661 states. [2021-07-13 19:22:23,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31661 to 21919. [2021-07-13 19:22:23,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21919 states, 21918 states have (on average 2.6655260516470483) internal successors, (58423), 21918 states have internal predecessors, (58423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:23,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 58423 transitions. [2021-07-13 19:22:23,715 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 58423 transitions. Word has length 65 [2021-07-13 19:22:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:23,715 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 58423 transitions. [2021-07-13 19:22:23,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 58423 transitions. [2021-07-13 19:22:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:23,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:23,736 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:23,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1232,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:23,936 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:23,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1386535353, now seen corresponding path program 170 times [2021-07-13 19:22:23,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:23,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205071329] [2021-07-13 19:22:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:24,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:24,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205071329] [2021-07-13 19:22:24,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205071329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:24,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778198132] [2021-07-13 19:22:24,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:24,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:24,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:24,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:24,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:24,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778198132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:24,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:24,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:22:24,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908094611] [2021-07-13 19:22:24,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:24,155 INFO L87 Difference]: Start difference. First operand 21919 states and 58423 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:24,453 INFO L93 Difference]: Finished difference Result 29555 states and 73447 transitions. [2021-07-13 19:22:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:22:24,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:24,508 INFO L225 Difference]: With dead ends: 29555 [2021-07-13 19:22:24,508 INFO L226 Difference]: Without dead ends: 29555 [2021-07-13 19:22:24,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:22:24,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2021-07-13 19:22:24,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 21626. [2021-07-13 19:22:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21626 states, 21625 states have (on average 2.6610404624277457) internal successors, (57545), 21625 states have internal predecessors, (57545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:25,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57545 transitions. [2021-07-13 19:22:25,024 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57545 transitions. Word has length 65 [2021-07-13 19:22:25,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:25,024 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57545 transitions. [2021-07-13 19:22:25,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:25,024 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57545 transitions. [2021-07-13 19:22:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:25,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:25,043 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:25,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-07-13 19:22:25,243 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:25,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:25,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1121641549, now seen corresponding path program 354 times [2021-07-13 19:22:25,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:25,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315569420] [2021-07-13 19:22:25,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:25,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:25,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315569420] [2021-07-13 19:22:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315569420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:25,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743744971] [2021-07-13 19:22:25,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:25,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:22:25,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:25,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:25,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:25,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743744971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:25,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:25,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:22:25,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925330603] [2021-07-13 19:22:25,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:25,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:25,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:25,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:25,454 INFO L87 Difference]: Start difference. First operand 21626 states and 57545 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:25,716 INFO L93 Difference]: Finished difference Result 24366 states and 62196 transitions. [2021-07-13 19:22:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:22:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:25,758 INFO L225 Difference]: With dead ends: 24366 [2021-07-13 19:22:25,759 INFO L226 Difference]: Without dead ends: 24348 [2021-07-13 19:22:25,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24348 states. [2021-07-13 19:22:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24348 to 21626. [2021-07-13 19:22:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21626 states, 21625 states have (on average 2.660578034682081) internal successors, (57535), 21625 states have internal predecessors, (57535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57535 transitions. [2021-07-13 19:22:26,163 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57535 transitions. Word has length 65 [2021-07-13 19:22:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:26,163 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57535 transitions. [2021-07-13 19:22:26,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57535 transitions. [2021-07-13 19:22:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:26,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:26,182 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:26,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1234,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:26,383 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:26,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:26,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1172605066, now seen corresponding path program 171 times [2021-07-13 19:22:26,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:26,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132972243] [2021-07-13 19:22:26,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:26,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132972243] [2021-07-13 19:22:26,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132972243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:26,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271331373] [2021-07-13 19:22:26,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:26,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:22:26,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:26,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:26,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271331373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:26,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:26,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:22:26,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373228135] [2021-07-13 19:22:26,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:26,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:26,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:26,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:26,605 INFO L87 Difference]: Start difference. First operand 21626 states and 57535 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:27,288 INFO L93 Difference]: Finished difference Result 24595 states and 63247 transitions. [2021-07-13 19:22:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:27,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:27,330 INFO L225 Difference]: With dead ends: 24595 [2021-07-13 19:22:27,330 INFO L226 Difference]: Without dead ends: 24545 [2021-07-13 19:22:27,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24545 states. [2021-07-13 19:22:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24545 to 21849. [2021-07-13 19:22:27,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21849 states, 21848 states have (on average 2.659602709630172) internal successors, (58107), 21848 states have internal predecessors, (58107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21849 states to 21849 states and 58107 transitions. [2021-07-13 19:22:27,756 INFO L78 Accepts]: Start accepts. Automaton has 21849 states and 58107 transitions. Word has length 65 [2021-07-13 19:22:27,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:27,756 INFO L482 AbstractCegarLoop]: Abstraction has 21849 states and 58107 transitions. [2021-07-13 19:22:27,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:27,756 INFO L276 IsEmpty]: Start isEmpty. Operand 21849 states and 58107 transitions. [2021-07-13 19:22:27,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:27,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:27,775 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:27,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1238 [2021-07-13 19:22:27,975 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:27,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:27,976 INFO L82 PathProgramCache]: Analyzing trace with hash -381091791, now seen corresponding path program 355 times [2021-07-13 19:22:27,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:27,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635762553] [2021-07-13 19:22:27,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:28,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:28,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635762553] [2021-07-13 19:22:28,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635762553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:28,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39921590] [2021-07-13 19:22:28,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:28,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:28,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:28,152 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:28,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39921590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:28,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:28,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:22:28,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040289580] [2021-07-13 19:22:28,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:22:28,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:28,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:22:28,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:22:28,153 INFO L87 Difference]: Start difference. First operand 21849 states and 58107 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:28,387 INFO L93 Difference]: Finished difference Result 25610 states and 64561 transitions. [2021-07-13 19:22:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:22:28,388 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:28,439 INFO L225 Difference]: With dead ends: 25610 [2021-07-13 19:22:28,439 INFO L226 Difference]: Without dead ends: 25607 [2021-07-13 19:22:28,439 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25607 states. [2021-07-13 19:22:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25607 to 21817. [2021-07-13 19:22:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21817 states, 21816 states have (on average 2.657957462412908) internal successors, (57986), 21816 states have internal predecessors, (57986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57986 transitions. [2021-07-13 19:22:28,887 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57986 transitions. Word has length 65 [2021-07-13 19:22:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:28,887 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57986 transitions. [2021-07-13 19:22:28,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57986 transitions. [2021-07-13 19:22:28,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:28,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:28,906 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:29,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:29,107 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash -174029225, now seen corresponding path program 356 times [2021-07-13 19:22:29,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:29,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878110257] [2021-07-13 19:22:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:29,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:29,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878110257] [2021-07-13 19:22:29,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878110257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:29,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413818164] [2021-07-13 19:22:29,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:29,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:29,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:29,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:29,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:29,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413818164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:29,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:29,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:22:29,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637450107] [2021-07-13 19:22:29,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:29,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:29,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:29,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:29,292 INFO L87 Difference]: Start difference. First operand 21817 states and 57986 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:29,556 INFO L93 Difference]: Finished difference Result 25614 states and 64489 transitions. [2021-07-13 19:22:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:22:29,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:29,606 INFO L225 Difference]: With dead ends: 25614 [2021-07-13 19:22:29,606 INFO L226 Difference]: Without dead ends: 25596 [2021-07-13 19:22:29,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:29,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25596 states. [2021-07-13 19:22:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25596 to 21817. [2021-07-13 19:22:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21817 states, 21816 states have (on average 2.6563989732306563) internal successors, (57952), 21816 states have internal predecessors, (57952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57952 transitions. [2021-07-13 19:22:30,181 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57952 transitions. Word has length 65 [2021-07-13 19:22:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:30,181 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57952 transitions. [2021-07-13 19:22:30,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57952 transitions. [2021-07-13 19:22:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:30,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:30,200 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:30,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:30,400 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1622029238, now seen corresponding path program 357 times [2021-07-13 19:22:30,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:30,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921909271] [2021-07-13 19:22:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:30,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:30,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921909271] [2021-07-13 19:22:30,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921909271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:30,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467297356] [2021-07-13 19:22:30,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:30,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:22:30,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:30,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:30,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:30,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467297356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:30,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:30,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:22:30,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369236144] [2021-07-13 19:22:30,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:30,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:30,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:30,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:30,625 INFO L87 Difference]: Start difference. First operand 21817 states and 57952 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:31,464 INFO L93 Difference]: Finished difference Result 23463 states and 60807 transitions. [2021-07-13 19:22:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:31,464 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:31,501 INFO L225 Difference]: With dead ends: 23463 [2021-07-13 19:22:31,502 INFO L226 Difference]: Without dead ends: 23407 [2021-07-13 19:22:31,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23407 states. [2021-07-13 19:22:31,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23407 to 21785. [2021-07-13 19:22:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21785 states, 21784 states have (on average 2.6542875504957766) internal successors, (57821), 21784 states have internal predecessors, (57821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21785 states to 21785 states and 57821 transitions. [2021-07-13 19:22:31,872 INFO L78 Accepts]: Start accepts. Automaton has 21785 states and 57821 transitions. Word has length 65 [2021-07-13 19:22:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:31,872 INFO L482 AbstractCegarLoop]: Abstraction has 21785 states and 57821 transitions. [2021-07-13 19:22:31,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 21785 states and 57821 transitions. [2021-07-13 19:22:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:31,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:31,891 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:32,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-07-13 19:22:32,091 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:32,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2059401878, now seen corresponding path program 358 times [2021-07-13 19:22:32,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:32,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409629998] [2021-07-13 19:22:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:32,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:32,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409629998] [2021-07-13 19:22:32,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409629998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:32,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057869006] [2021-07-13 19:22:32,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:32,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:32,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:32,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:32,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:32,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057869006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:32,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:32,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:22:32,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736495373] [2021-07-13 19:22:32,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:32,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:32,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:32,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:32,310 INFO L87 Difference]: Start difference. First operand 21785 states and 57821 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:32,971 INFO L93 Difference]: Finished difference Result 24092 states and 62187 transitions. [2021-07-13 19:22:32,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:32,972 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:33,013 INFO L225 Difference]: With dead ends: 24092 [2021-07-13 19:22:33,013 INFO L226 Difference]: Without dead ends: 24080 [2021-07-13 19:22:33,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24080 states. [2021-07-13 19:22:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24080 to 21828. [2021-07-13 19:22:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21828 states, 21827 states have (on average 2.6531818390067348) internal successors, (57911), 21827 states have internal predecessors, (57911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:33,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21828 states to 21828 states and 57911 transitions. [2021-07-13 19:22:33,401 INFO L78 Accepts]: Start accepts. Automaton has 21828 states and 57911 transitions. Word has length 65 [2021-07-13 19:22:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:33,401 INFO L482 AbstractCegarLoop]: Abstraction has 21828 states and 57911 transitions. [2021-07-13 19:22:33,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 21828 states and 57911 transitions. [2021-07-13 19:22:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:33,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:33,420 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:33,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-07-13 19:22:33,621 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:33,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1902102391, now seen corresponding path program 172 times [2021-07-13 19:22:33,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:33,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446898372] [2021-07-13 19:22:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:33,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446898372] [2021-07-13 19:22:33,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446898372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992579079] [2021-07-13 19:22:33,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:33,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:33,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:33,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:33,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:33,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992579079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:33,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:33,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:22:33,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520993207] [2021-07-13 19:22:33,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:33,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:33,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:33,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:33,813 INFO L87 Difference]: Start difference. First operand 21828 states and 57911 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:34,117 INFO L93 Difference]: Finished difference Result 28795 states and 71587 transitions. [2021-07-13 19:22:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:22:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:34,170 INFO L225 Difference]: With dead ends: 28795 [2021-07-13 19:22:34,171 INFO L226 Difference]: Without dead ends: 28765 [2021-07-13 19:22:34,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28765 states. [2021-07-13 19:22:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28765 to 21897. [2021-07-13 19:22:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21897 states, 21896 states have (on average 2.6523565948118377) internal successors, (58076), 21896 states have internal predecessors, (58076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21897 states to 21897 states and 58076 transitions. [2021-07-13 19:22:34,616 INFO L78 Accepts]: Start accepts. Automaton has 21897 states and 58076 transitions. Word has length 65 [2021-07-13 19:22:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:34,616 INFO L482 AbstractCegarLoop]: Abstraction has 21897 states and 58076 transitions. [2021-07-13 19:22:34,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 21897 states and 58076 transitions. [2021-07-13 19:22:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:34,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:34,636 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:34,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1246,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:34,836 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash -93648084, now seen corresponding path program 359 times [2021-07-13 19:22:34,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:34,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834137069] [2021-07-13 19:22:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:34,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:34,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:34,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834137069] [2021-07-13 19:22:34,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834137069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:34,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559582389] [2021-07-13 19:22:34,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:34,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:22:34,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:34,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:35,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559582389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:35,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:35,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:22:35,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000820296] [2021-07-13 19:22:35,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:35,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:35,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:35,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:35,060 INFO L87 Difference]: Start difference. First operand 21897 states and 58076 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:35,869 INFO L93 Difference]: Finished difference Result 25821 states and 65999 transitions. [2021-07-13 19:22:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:22:35,870 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:35,915 INFO L225 Difference]: With dead ends: 25821 [2021-07-13 19:22:35,915 INFO L226 Difference]: Without dead ends: 25779 [2021-07-13 19:22:35,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:22:35,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25779 states. [2021-07-13 19:22:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25779 to 21985. [2021-07-13 19:22:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21985 states, 21984 states have (on average 2.652701965065502) internal successors, (58317), 21984 states have internal predecessors, (58317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:36,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21985 states to 21985 states and 58317 transitions. [2021-07-13 19:22:36,408 INFO L78 Accepts]: Start accepts. Automaton has 21985 states and 58317 transitions. Word has length 65 [2021-07-13 19:22:36,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:36,408 INFO L482 AbstractCegarLoop]: Abstraction has 21985 states and 58317 transitions. [2021-07-13 19:22:36,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:36,408 INFO L276 IsEmpty]: Start isEmpty. Operand 21985 states and 58317 transitions. [2021-07-13 19:22:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:36,429 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:36,429 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:36,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1249 [2021-07-13 19:22:36,630 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1438911025, now seen corresponding path program 360 times [2021-07-13 19:22:36,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:36,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183702156] [2021-07-13 19:22:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 83 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:36,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:36,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183702156] [2021-07-13 19:22:36,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183702156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:36,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045775309] [2021-07-13 19:22:36,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:36,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 19:22:36,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:36,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:36,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 83 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:36,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045775309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:36,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:36,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:22:36,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302474462] [2021-07-13 19:22:36,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:36,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:36,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:36,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:36,829 INFO L87 Difference]: Start difference. First operand 21985 states and 58317 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:37,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:37,107 INFO L93 Difference]: Finished difference Result 25751 states and 64746 transitions. [2021-07-13 19:22:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:22:37,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:37,154 INFO L225 Difference]: With dead ends: 25751 [2021-07-13 19:22:37,154 INFO L226 Difference]: Without dead ends: 25727 [2021-07-13 19:22:37,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25727 states. [2021-07-13 19:22:37,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25727 to 21464. [2021-07-13 19:22:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21464 states, 21463 states have (on average 2.6467409029492615) internal successors, (56807), 21463 states have internal predecessors, (56807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 56807 transitions. [2021-07-13 19:22:37,587 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 56807 transitions. Word has length 65 [2021-07-13 19:22:37,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:37,587 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 56807 transitions. [2021-07-13 19:22:37,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:37,587 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 56807 transitions. [2021-07-13 19:22:37,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:37,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:37,607 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:37,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1250 [2021-07-13 19:22:37,807 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash 61188450, now seen corresponding path program 361 times [2021-07-13 19:22:37,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:37,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095509385] [2021-07-13 19:22:37,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:37,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:37,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095509385] [2021-07-13 19:22:37,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095509385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:37,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940956753] [2021-07-13 19:22:37,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:37,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:37,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:38,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940956753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:38,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:38,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:22:38,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662664033] [2021-07-13 19:22:38,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:38,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:38,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:38,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:38,035 INFO L87 Difference]: Start difference. First operand 21464 states and 56807 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:38,876 INFO L93 Difference]: Finished difference Result 26000 states and 65957 transitions. [2021-07-13 19:22:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:22:38,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:38,923 INFO L225 Difference]: With dead ends: 26000 [2021-07-13 19:22:38,923 INFO L226 Difference]: Without dead ends: 25946 [2021-07-13 19:22:38,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25946 states. [2021-07-13 19:22:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25946 to 21403. [2021-07-13 19:22:39,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21403 states, 21402 states have (on average 2.6448462760489675) internal successors, (56605), 21402 states have internal predecessors, (56605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:39,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21403 states to 21403 states and 56605 transitions. [2021-07-13 19:22:39,348 INFO L78 Accepts]: Start accepts. Automaton has 21403 states and 56605 transitions. Word has length 65 [2021-07-13 19:22:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:39,348 INFO L482 AbstractCegarLoop]: Abstraction has 21403 states and 56605 transitions. [2021-07-13 19:22:39,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 21403 states and 56605 transitions. [2021-07-13 19:22:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:39,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:39,366 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:39,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-07-13 19:22:39,567 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:39,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:39,567 INFO L82 PathProgramCache]: Analyzing trace with hash -798753477, now seen corresponding path program 173 times [2021-07-13 19:22:39,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:39,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242855855] [2021-07-13 19:22:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:39,645 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 154 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:39,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:39,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242855855] [2021-07-13 19:22:39,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242855855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:39,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675430656] [2021-07-13 19:22:39,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:39,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:22:39,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:39,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:39,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:39,840 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:39,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675430656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:39,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:39,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2021-07-13 19:22:39,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764281646] [2021-07-13 19:22:39,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:22:39,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:39,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:22:39,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:22:39,841 INFO L87 Difference]: Start difference. First operand 21403 states and 56605 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:40,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:40,288 INFO L93 Difference]: Finished difference Result 34849 states and 85268 transitions. [2021-07-13 19:22:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:22:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:40,351 INFO L225 Difference]: With dead ends: 34849 [2021-07-13 19:22:40,351 INFO L226 Difference]: Without dead ends: 34849 [2021-07-13 19:22:40,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 208.7ms TimeCoverageRelationStatistics Valid=303, Invalid=453, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:22:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34849 states. [2021-07-13 19:22:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34849 to 21691. [2021-07-13 19:22:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21691 states, 21690 states have (on average 2.6503457814661133) internal successors, (57486), 21690 states have internal predecessors, (57486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21691 states to 21691 states and 57486 transitions. [2021-07-13 19:22:40,850 INFO L78 Accepts]: Start accepts. Automaton has 21691 states and 57486 transitions. Word has length 65 [2021-07-13 19:22:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:40,850 INFO L482 AbstractCegarLoop]: Abstraction has 21691 states and 57486 transitions. [2021-07-13 19:22:40,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 21691 states and 57486 transitions. [2021-07-13 19:22:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:40,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:40,871 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:41,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-07-13 19:22:41,071 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1858641363, now seen corresponding path program 174 times [2021-07-13 19:22:41,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:41,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936070270] [2021-07-13 19:22:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 149 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:41,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:41,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936070270] [2021-07-13 19:22:41,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936070270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:41,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661574088] [2021-07-13 19:22:41,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:41,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 19:22:41,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:41,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:41,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 150 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:41,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661574088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:41,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:41,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:22:41,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490449345] [2021-07-13 19:22:41,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:41,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:41,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:41,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:41,284 INFO L87 Difference]: Start difference. First operand 21691 states and 57486 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:41,640 INFO L93 Difference]: Finished difference Result 33025 states and 80919 transitions. [2021-07-13 19:22:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:22:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:41,694 INFO L225 Difference]: With dead ends: 33025 [2021-07-13 19:22:41,694 INFO L226 Difference]: Without dead ends: 33025 [2021-07-13 19:22:41,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:22:41,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33025 states. [2021-07-13 19:22:42,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33025 to 21674. [2021-07-13 19:22:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21674 states, 21673 states have (on average 2.648964148941079) internal successors, (57411), 21673 states have internal predecessors, (57411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21674 states to 21674 states and 57411 transitions. [2021-07-13 19:22:42,181 INFO L78 Accepts]: Start accepts. Automaton has 21674 states and 57411 transitions. Word has length 65 [2021-07-13 19:22:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:42,181 INFO L482 AbstractCegarLoop]: Abstraction has 21674 states and 57411 transitions. [2021-07-13 19:22:42,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21674 states and 57411 transitions. [2021-07-13 19:22:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:42,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:42,200 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:42,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-07-13 19:22:42,401 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 168646199, now seen corresponding path program 175 times [2021-07-13 19:22:42,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:42,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15975059] [2021-07-13 19:22:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:42,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:42,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15975059] [2021-07-13 19:22:42,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15975059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:42,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261332417] [2021-07-13 19:22:42,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:42,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:42,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 131 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:42,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261332417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:42,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:42,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:22:42,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210079913] [2021-07-13 19:22:42,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:42,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:42,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:42,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:42,622 INFO L87 Difference]: Start difference. First operand 21674 states and 57411 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:42,994 INFO L93 Difference]: Finished difference Result 29232 states and 72460 transitions. [2021-07-13 19:22:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:22:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:43,057 INFO L225 Difference]: With dead ends: 29232 [2021-07-13 19:22:43,057 INFO L226 Difference]: Without dead ends: 29232 [2021-07-13 19:22:43,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29232 states. [2021-07-13 19:22:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29232 to 21133. [2021-07-13 19:22:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21133 states, 21132 states have (on average 2.6413496119629) internal successors, (55817), 21132 states have internal predecessors, (55817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55817 transitions. [2021-07-13 19:22:43,493 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55817 transitions. Word has length 65 [2021-07-13 19:22:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:43,493 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55817 transitions. [2021-07-13 19:22:43,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:43,493 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55817 transitions. [2021-07-13 19:22:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:43,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:43,511 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:43,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-07-13 19:22:43,711 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:43,711 INFO L82 PathProgramCache]: Analyzing trace with hash 447791127, now seen corresponding path program 362 times [2021-07-13 19:22:43,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:43,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991770387] [2021-07-13 19:22:43,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 88 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:43,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:43,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991770387] [2021-07-13 19:22:43,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991770387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:43,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742620805] [2021-07-13 19:22:43,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:43,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:43,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:43,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 88 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:43,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742620805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:43,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:43,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:22:43,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479614937] [2021-07-13 19:22:43,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:43,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:43,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:43,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:43,918 INFO L87 Difference]: Start difference. First operand 21133 states and 55817 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:44,218 INFO L93 Difference]: Finished difference Result 24649 states and 61830 transitions. [2021-07-13 19:22:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:22:44,218 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:44,270 INFO L225 Difference]: With dead ends: 24649 [2021-07-13 19:22:44,270 INFO L226 Difference]: Without dead ends: 24622 [2021-07-13 19:22:44,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:22:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24622 states. [2021-07-13 19:22:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24622 to 21133. [2021-07-13 19:22:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21133 states, 21132 states have (on average 2.640781752791974) internal successors, (55805), 21132 states have internal predecessors, (55805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55805 transitions. [2021-07-13 19:22:44,669 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55805 transitions. Word has length 65 [2021-07-13 19:22:44,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:44,669 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55805 transitions. [2021-07-13 19:22:44,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55805 transitions. [2021-07-13 19:22:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:44,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:44,689 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:44,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1258,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:44,889 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:44,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash -275453914, now seen corresponding path program 176 times [2021-07-13 19:22:44,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:44,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105908020] [2021-07-13 19:22:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:44,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:44,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105908020] [2021-07-13 19:22:44,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105908020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:44,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102906145] [2021-07-13 19:22:44,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:45,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:45,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:45,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:45,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102906145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:45,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:45,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:22:45,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679985257] [2021-07-13 19:22:45,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:45,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:45,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:45,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:45,106 INFO L87 Difference]: Start difference. First operand 21133 states and 55805 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:45,769 INFO L93 Difference]: Finished difference Result 23655 states and 60711 transitions. [2021-07-13 19:22:45,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:45,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:45,810 INFO L225 Difference]: With dead ends: 23655 [2021-07-13 19:22:45,810 INFO L226 Difference]: Without dead ends: 23612 [2021-07-13 19:22:45,810 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:45,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23612 states. [2021-07-13 19:22:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23612 to 21337. [2021-07-13 19:22:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21337 states, 21336 states have (on average 2.6395763029621295) internal successors, (56318), 21336 states have internal predecessors, (56318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:46,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56318 transitions. [2021-07-13 19:22:46,219 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56318 transitions. Word has length 65 [2021-07-13 19:22:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:46,219 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56318 transitions. [2021-07-13 19:22:46,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56318 transitions. [2021-07-13 19:22:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:46,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:46,238 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:46,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:46,438 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1829150771, now seen corresponding path program 363 times [2021-07-13 19:22:46,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:46,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293719445] [2021-07-13 19:22:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:46,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293719445] [2021-07-13 19:22:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293719445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:46,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432394134] [2021-07-13 19:22:46,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:46,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:22:46,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:46,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:46,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:46,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432394134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:46,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:46,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:22:46,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299354472] [2021-07-13 19:22:46,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:22:46,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:46,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:22:46,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:22:46,630 INFO L87 Difference]: Start difference. First operand 21337 states and 56318 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:46,843 INFO L93 Difference]: Finished difference Result 25552 states and 63612 transitions. [2021-07-13 19:22:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:22:46,843 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:46,887 INFO L225 Difference]: With dead ends: 25552 [2021-07-13 19:22:46,888 INFO L226 Difference]: Without dead ends: 25549 [2021-07-13 19:22:46,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25549 states. [2021-07-13 19:22:47,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25549 to 21311. [2021-07-13 19:22:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 21310 states have (on average 2.638198029094322) internal successors, (56220), 21310 states have internal predecessors, (56220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56220 transitions. [2021-07-13 19:22:47,339 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56220 transitions. Word has length 65 [2021-07-13 19:22:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:47,340 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56220 transitions. [2021-07-13 19:22:47,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56220 transitions. [2021-07-13 19:22:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:47,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:47,359 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:47,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1264 [2021-07-13 19:22:47,559 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:47,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:47,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1622088205, now seen corresponding path program 364 times [2021-07-13 19:22:47,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:47,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004730952] [2021-07-13 19:22:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:47,631 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 149 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:47,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:47,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004730952] [2021-07-13 19:22:47,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004730952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:47,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261021169] [2021-07-13 19:22:47,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:47,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:47,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:47,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:47,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 149 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:47,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261021169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:47,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:47,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:22:47,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879983970] [2021-07-13 19:22:47,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:47,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:47,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:47,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:47,744 INFO L87 Difference]: Start difference. First operand 21311 states and 56220 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:48,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:48,017 INFO L93 Difference]: Finished difference Result 25562 states and 63563 transitions. [2021-07-13 19:22:48,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:22:48,018 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:48,066 INFO L225 Difference]: With dead ends: 25562 [2021-07-13 19:22:48,066 INFO L226 Difference]: Without dead ends: 25544 [2021-07-13 19:22:48,066 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25544 states. [2021-07-13 19:22:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25544 to 21311. [2021-07-13 19:22:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21311 states, 21310 states have (on average 2.6368840919755985) internal successors, (56192), 21310 states have internal predecessors, (56192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56192 transitions. [2021-07-13 19:22:48,455 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56192 transitions. Word has length 65 [2021-07-13 19:22:48,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:48,455 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56192 transitions. [2021-07-13 19:22:48,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56192 transitions. [2021-07-13 19:22:48,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:48,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:48,476 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:48,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1266 [2021-07-13 19:22:48,677 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:48,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:48,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1224879078, now seen corresponding path program 365 times [2021-07-13 19:22:48,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:48,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091298637] [2021-07-13 19:22:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:48,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:48,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091298637] [2021-07-13 19:22:48,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091298637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:48,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280362882] [2021-07-13 19:22:48,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:48,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-13 19:22:48,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:48,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280362882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:48,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:48,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:22:48,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147852261] [2021-07-13 19:22:48,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:48,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:48,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:48,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:48,901 INFO L87 Difference]: Start difference. First operand 21311 states and 56192 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:49,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:49,804 INFO L93 Difference]: Finished difference Result 22721 states and 58670 transitions. [2021-07-13 19:22:49,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:49,804 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:49,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:49,841 INFO L225 Difference]: With dead ends: 22721 [2021-07-13 19:22:49,841 INFO L226 Difference]: Without dead ends: 22647 [2021-07-13 19:22:49,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22647 states. [2021-07-13 19:22:50,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22647 to 21285. [2021-07-13 19:22:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21285 states, 21284 states have (on average 2.6344202217628268) internal successors, (56071), 21284 states have internal predecessors, (56071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21285 states to 21285 states and 56071 transitions. [2021-07-13 19:22:50,234 INFO L78 Accepts]: Start accepts. Automaton has 21285 states and 56071 transitions. Word has length 65 [2021-07-13 19:22:50,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:50,234 INFO L482 AbstractCegarLoop]: Abstraction has 21285 states and 56071 transitions. [2021-07-13 19:22:50,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 21285 states and 56071 transitions. [2021-07-13 19:22:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:50,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:50,253 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:50,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1269 [2021-07-13 19:22:50,454 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:50,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:50,454 INFO L82 PathProgramCache]: Analyzing trace with hash 611342898, now seen corresponding path program 366 times [2021-07-13 19:22:50,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:50,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465967194] [2021-07-13 19:22:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:50,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:50,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465967194] [2021-07-13 19:22:50,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465967194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:50,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179107458] [2021-07-13 19:22:50,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:50,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 19:22:50,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:50,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:22:50,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179107458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:50,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:50,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:22:50,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22690136] [2021-07-13 19:22:50,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:22:50,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:50,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:22:50,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:22:50,689 INFO L87 Difference]: Start difference. First operand 21285 states and 56071 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:51,326 INFO L93 Difference]: Finished difference Result 23377 states and 60094 transitions. [2021-07-13 19:22:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:22:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:51,367 INFO L225 Difference]: With dead ends: 23377 [2021-07-13 19:22:51,367 INFO L226 Difference]: Without dead ends: 23365 [2021-07-13 19:22:51,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:22:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23365 states. [2021-07-13 19:22:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23365 to 21337. [2021-07-13 19:22:51,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21337 states, 21336 states have (on average 2.6334364454443193) internal successors, (56187), 21336 states have internal predecessors, (56187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:51,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56187 transitions. [2021-07-13 19:22:51,765 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56187 transitions. Word has length 65 [2021-07-13 19:22:51,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:51,765 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56187 transitions. [2021-07-13 19:22:51,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:51,766 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56187 transitions. [2021-07-13 19:22:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:51,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:51,787 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:51,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1270,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:51,987 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:51,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:51,987 INFO L82 PathProgramCache]: Analyzing trace with hash 454043411, now seen corresponding path program 177 times [2021-07-13 19:22:51,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:51,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220658243] [2021-07-13 19:22:51,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 143 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:52,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:52,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220658243] [2021-07-13 19:22:52,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220658243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:52,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143938036] [2021-07-13 19:22:52,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:52,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:22:52,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:52,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 145 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:22:52,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143938036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:52,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:52,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:22:52,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085199079] [2021-07-13 19:22:52,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:52,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:52,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:52,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:52,183 INFO L87 Difference]: Start difference. First operand 21337 states and 56187 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:52,465 INFO L93 Difference]: Finished difference Result 27785 states and 69129 transitions. [2021-07-13 19:22:52,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:22:52,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:52,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:52,510 INFO L225 Difference]: With dead ends: 27785 [2021-07-13 19:22:52,511 INFO L226 Difference]: Without dead ends: 27755 [2021-07-13 19:22:52,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27755 states. [2021-07-13 19:22:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27755 to 21784. [2021-07-13 19:22:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21784 states, 21783 states have (on average 2.6391681586558327) internal successors, (57489), 21783 states have internal predecessors, (57489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21784 states to 21784 states and 57489 transitions. [2021-07-13 19:22:52,961 INFO L78 Accepts]: Start accepts. Automaton has 21784 states and 57489 transitions. Word has length 65 [2021-07-13 19:22:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:52,961 INFO L482 AbstractCegarLoop]: Abstraction has 21784 states and 57489 transitions. [2021-07-13 19:22:52,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 21784 states and 57489 transitions. [2021-07-13 19:22:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:52,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:52,981 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:53,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:53,181 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:53,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1541707064, now seen corresponding path program 367 times [2021-07-13 19:22:53,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:53,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363460536] [2021-07-13 19:22:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:53,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:53,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363460536] [2021-07-13 19:22:53,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363460536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:53,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079459688] [2021-07-13 19:22:53,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:53,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:53,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:53,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079459688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:53,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:53,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:22:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602893792] [2021-07-13 19:22:53,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:53,405 INFO L87 Difference]: Start difference. First operand 21784 states and 57489 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:54,293 INFO L93 Difference]: Finished difference Result 25899 states and 65956 transitions. [2021-07-13 19:22:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:22:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:54,341 INFO L225 Difference]: With dead ends: 25899 [2021-07-13 19:22:54,341 INFO L226 Difference]: Without dead ends: 25845 [2021-07-13 19:22:54,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:22:54,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25845 states. [2021-07-13 19:22:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25845 to 21962. [2021-07-13 19:22:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21962 states, 21961 states have (on average 2.6392240790492236) internal successors, (57960), 21961 states have internal predecessors, (57960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57960 transitions. [2021-07-13 19:22:54,762 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57960 transitions. Word has length 65 [2021-07-13 19:22:54,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:54,762 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57960 transitions. [2021-07-13 19:22:54,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:54,762 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57960 transitions. [2021-07-13 19:22:54,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:54,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:54,783 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:54,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:54,983 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:54,984 INFO L82 PathProgramCache]: Analyzing trace with hash -9147955, now seen corresponding path program 368 times [2021-07-13 19:22:54,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:54,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435986236] [2021-07-13 19:22:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 69 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:55,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:55,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435986236] [2021-07-13 19:22:55,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435986236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:55,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952168152] [2021-07-13 19:22:55,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:55,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:22:55,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:55,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:55,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 69 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:55,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952168152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:55,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:55,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:22:55,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497246268] [2021-07-13 19:22:55,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:22:55,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:55,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:22:55,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:22:55,180 INFO L87 Difference]: Start difference. First operand 21962 states and 57960 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:55,472 INFO L93 Difference]: Finished difference Result 26218 states and 65296 transitions. [2021-07-13 19:22:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:22:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:55,523 INFO L225 Difference]: With dead ends: 26218 [2021-07-13 19:22:55,523 INFO L226 Difference]: Without dead ends: 26194 [2021-07-13 19:22:55,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:22:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26194 states. [2021-07-13 19:22:55,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26194 to 21962. [2021-07-13 19:22:55,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21962 states, 21961 states have (on average 2.63844997950913) internal successors, (57943), 21961 states have internal predecessors, (57943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57943 transitions. [2021-07-13 19:22:55,933 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57943 transitions. Word has length 65 [2021-07-13 19:22:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:55,933 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57943 transitions. [2021-07-13 19:22:55,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57943 transitions. [2021-07-13 19:22:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:55,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:55,951 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:56,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1275 [2021-07-13 19:22:56,151 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:56,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:56,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1386870530, now seen corresponding path program 369 times [2021-07-13 19:22:56,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:56,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196528432] [2021-07-13 19:22:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:56,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:56,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196528432] [2021-07-13 19:22:56,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196528432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:56,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28733547] [2021-07-13 19:22:56,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:56,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-13 19:22:56,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:56,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:56,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:22:56,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28733547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:56,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:56,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:22:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075988550] [2021-07-13 19:22:56,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:56,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:56,383 INFO L87 Difference]: Start difference. First operand 21962 states and 57943 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:57,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:57,494 INFO L93 Difference]: Finished difference Result 29175 states and 73161 transitions. [2021-07-13 19:22:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:22:57,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:57,551 INFO L225 Difference]: With dead ends: 29175 [2021-07-13 19:22:57,552 INFO L226 Difference]: Without dead ends: 29061 [2021-07-13 19:22:57,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:22:57,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29061 states. [2021-07-13 19:22:57,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29061 to 22155. [2021-07-13 19:22:57,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22155 states, 22154 states have (on average 2.638665703710391) internal successors, (58457), 22154 states have internal predecessors, (58457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 58457 transitions. [2021-07-13 19:22:57,957 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 58457 transitions. Word has length 65 [2021-07-13 19:22:57,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:57,957 INFO L482 AbstractCegarLoop]: Abstraction has 22155 states and 58457 transitions. [2021-07-13 19:22:57,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 58457 transitions. [2021-07-13 19:22:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:57,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:57,976 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:58,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-07-13 19:22:58,176 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:58,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1000267853, now seen corresponding path program 370 times [2021-07-13 19:22:58,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:58,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302229982] [2021-07-13 19:22:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:58,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:58,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:58,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302229982] [2021-07-13 19:22:58,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302229982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:58,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857484648] [2021-07-13 19:22:58,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:58,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:22:58,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:58,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:22:58,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:22:58,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857484648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:58,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:58,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:22:58,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770351945] [2021-07-13 19:22:58,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:22:58,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:58,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:22:58,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:22:58,380 INFO L87 Difference]: Start difference. First operand 22155 states and 58457 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:22:58,675 INFO L93 Difference]: Finished difference Result 26448 states and 65859 transitions. [2021-07-13 19:22:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:22:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:22:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:22:58,724 INFO L225 Difference]: With dead ends: 26448 [2021-07-13 19:22:58,725 INFO L226 Difference]: Without dead ends: 26415 [2021-07-13 19:22:58,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:22:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26415 states. [2021-07-13 19:22:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26415 to 21652. [2021-07-13 19:22:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21652 states, 21651 states have (on average 2.6335504133758256) internal successors, (57019), 21651 states have internal predecessors, (57019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21652 states to 21652 states and 57019 transitions. [2021-07-13 19:22:59,189 INFO L78 Accepts]: Start accepts. Automaton has 21652 states and 57019 transitions. Word has length 65 [2021-07-13 19:22:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:22:59,189 INFO L482 AbstractCegarLoop]: Abstraction has 21652 states and 57019 transitions. [2021-07-13 19:22:59,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:22:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 21652 states and 57019 transitions. [2021-07-13 19:22:59,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:22:59,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:22:59,209 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:22:59,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:59,410 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:22:59,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:22:59,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1446562040, now seen corresponding path program 371 times [2021-07-13 19:22:59,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:22:59,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174561129] [2021-07-13 19:22:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:22:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:22:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:59,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:22:59,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174561129] [2021-07-13 19:22:59,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174561129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:59,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917515535] [2021-07-13 19:22:59,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:22:59,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-13 19:22:59,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:22:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:22:59,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:22:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:22:59,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917515535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:22:59,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:22:59,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:22:59,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825668633] [2021-07-13 19:22:59,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:22:59,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:22:59,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:22:59,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:22:59,654 INFO L87 Difference]: Start difference. First operand 21652 states and 57019 transitions. Second operand has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:00,548 INFO L93 Difference]: Finished difference Result 27644 states and 69399 transitions. [2021-07-13 19:23:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:23:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:00,602 INFO L225 Difference]: With dead ends: 27644 [2021-07-13 19:23:00,603 INFO L226 Difference]: Without dead ends: 27488 [2021-07-13 19:23:00,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:23:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27488 states. [2021-07-13 19:23:00,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27488 to 21271. [2021-07-13 19:23:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21271 states, 21270 states have (on average 2.630747531734838) internal successors, (55956), 21270 states have internal predecessors, (55956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21271 states to 21271 states and 55956 transitions. [2021-07-13 19:23:01,034 INFO L78 Accepts]: Start accepts. Automaton has 21271 states and 55956 transitions. Word has length 65 [2021-07-13 19:23:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:01,034 INFO L482 AbstractCegarLoop]: Abstraction has 21271 states and 55956 transitions. [2021-07-13 19:23:01,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.125) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 21271 states and 55956 transitions. [2021-07-13 19:23:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:01,053 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:01,053 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:01,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:01,253 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:01,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:01,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463329, now seen corresponding path program 178 times [2021-07-13 19:23:01,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:01,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5095389] [2021-07-13 19:23:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 167 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:01,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:01,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5095389] [2021-07-13 19:23:01,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5095389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:01,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819580957] [2021-07-13 19:23:01,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:01,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:01,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:01,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 168 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:01,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819580957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:01,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:01,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:23:01,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557679651] [2021-07-13 19:23:01,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:01,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:01,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:01,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:01,446 INFO L87 Difference]: Start difference. First operand 21271 states and 55956 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:01,761 INFO L93 Difference]: Finished difference Result 33905 states and 83190 transitions. [2021-07-13 19:23:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:23:01,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:01,818 INFO L225 Difference]: With dead ends: 33905 [2021-07-13 19:23:01,818 INFO L226 Difference]: Without dead ends: 33905 [2021-07-13 19:23:01,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:23:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33905 states. [2021-07-13 19:23:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33905 to 21594. [2021-07-13 19:23:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21594 states, 21593 states have (on average 2.637567730282962) internal successors, (56953), 21593 states have internal predecessors, (56953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21594 states to 21594 states and 56953 transitions. [2021-07-13 19:23:02,264 INFO L78 Accepts]: Start accepts. Automaton has 21594 states and 56953 transitions. Word has length 65 [2021-07-13 19:23:02,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:02,265 INFO L482 AbstractCegarLoop]: Abstraction has 21594 states and 56953 transitions. [2021-07-13 19:23:02,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 21594 states and 56953 transitions. [2021-07-13 19:23:02,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:02,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:02,284 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:02,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-07-13 19:23:02,484 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:02,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:02,484 INFO L82 PathProgramCache]: Analyzing trace with hash 350890873, now seen corresponding path program 179 times [2021-07-13 19:23:02,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:02,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379761734] [2021-07-13 19:23:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:02,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:02,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379761734] [2021-07-13 19:23:02,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379761734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:02,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564932821] [2021-07-13 19:23:02,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:02,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:23:02,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:02,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:02,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 165 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:02,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564932821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:02,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:02,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 23 [2021-07-13 19:23:02,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641726664] [2021-07-13 19:23:02,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:23:02,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:23:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:23:02,784 INFO L87 Difference]: Start difference. First operand 21594 states and 56953 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:03,460 INFO L93 Difference]: Finished difference Result 37416 states and 91139 transitions. [2021-07-13 19:23:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:23:03,460 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:03,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:03,535 INFO L225 Difference]: With dead ends: 37416 [2021-07-13 19:23:03,535 INFO L226 Difference]: Without dead ends: 37416 [2021-07-13 19:23:03,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=476, Invalid=784, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:23:03,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37416 states. [2021-07-13 19:23:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37416 to 21628. [2021-07-13 19:23:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21628 states, 21627 states have (on average 2.6370277893374023) internal successors, (57031), 21627 states have internal predecessors, (57031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21628 states to 21628 states and 57031 transitions. [2021-07-13 19:23:04,009 INFO L78 Accepts]: Start accepts. Automaton has 21628 states and 57031 transitions. Word has length 65 [2021-07-13 19:23:04,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:04,010 INFO L482 AbstractCegarLoop]: Abstraction has 21628 states and 57031 transitions. [2021-07-13 19:23:04,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 23 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:04,010 INFO L276 IsEmpty]: Start isEmpty. Operand 21628 states and 57031 transitions. [2021-07-13 19:23:04,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:04,028 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:04,028 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:04,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-07-13 19:23:04,229 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:04,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1339104291, now seen corresponding path program 180 times [2021-07-13 19:23:04,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:04,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149379860] [2021-07-13 19:23:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 147 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:04,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:04,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149379860] [2021-07-13 19:23:04,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149379860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:04,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227902776] [2021-07-13 19:23:04,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:04,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-13 19:23:04,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:04,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 148 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:04,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227902776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:04,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:04,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:23:04,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801158927] [2021-07-13 19:23:04,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:04,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:04,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:04,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:04,457 INFO L87 Difference]: Start difference. First operand 21628 states and 57031 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:04,897 INFO L93 Difference]: Finished difference Result 33319 states and 81655 transitions. [2021-07-13 19:23:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:23:04,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:04,965 INFO L225 Difference]: With dead ends: 33319 [2021-07-13 19:23:04,965 INFO L226 Difference]: Without dead ends: 33319 [2021-07-13 19:23:04,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:23:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33319 states. [2021-07-13 19:23:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33319 to 21577. [2021-07-13 19:23:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21577 states, 21576 states have (on average 2.6354746014089727) internal successors, (56863), 21576 states have internal predecessors, (56863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 56863 transitions. [2021-07-13 19:23:05,432 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 56863 transitions. Word has length 65 [2021-07-13 19:23:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:05,432 INFO L482 AbstractCegarLoop]: Abstraction has 21577 states and 56863 transitions. [2021-07-13 19:23:05,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 56863 transitions. [2021-07-13 19:23:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:05,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:05,452 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:05,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1288,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:05,652 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:05,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1916575993, now seen corresponding path program 181 times [2021-07-13 19:23:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:05,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347087806] [2021-07-13 19:23:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 131 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:05,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:05,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347087806] [2021-07-13 19:23:05,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347087806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:05,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374343329] [2021-07-13 19:23:05,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:05,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:05,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374343329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:05,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:05,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-07-13 19:23:05,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60706731] [2021-07-13 19:23:05,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:05,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:05,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:05,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:05,878 INFO L87 Difference]: Start difference. First operand 21577 states and 56863 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:06,273 INFO L93 Difference]: Finished difference Result 28453 states and 70741 transitions. [2021-07-13 19:23:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:23:06,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:06,328 INFO L225 Difference]: With dead ends: 28453 [2021-07-13 19:23:06,328 INFO L226 Difference]: Without dead ends: 28453 [2021-07-13 19:23:06,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:23:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28453 states. [2021-07-13 19:23:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28453 to 21132. [2021-07-13 19:23:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.630921395106715) internal successors, (55594), 21131 states have internal predecessors, (55594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55594 transitions. [2021-07-13 19:23:06,763 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55594 transitions. Word has length 65 [2021-07-13 19:23:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:06,763 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55594 transitions. [2021-07-13 19:23:06,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55594 transitions. [2021-07-13 19:23:06,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:06,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:06,785 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:06,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-07-13 19:23:06,986 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:06,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:06,986 INFO L82 PathProgramCache]: Analyzing trace with hash 447010829, now seen corresponding path program 372 times [2021-07-13 19:23:06,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:06,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355083099] [2021-07-13 19:23:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:07,117 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:07,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355083099] [2021-07-13 19:23:07,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355083099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558006063] [2021-07-13 19:23:07,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:07,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 19:23:07,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:07,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:07,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558006063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:07,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:07,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:23:07,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286126135] [2021-07-13 19:23:07,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:07,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:07,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:07,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:07,240 INFO L87 Difference]: Start difference. First operand 21132 states and 55594 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:07,556 INFO L93 Difference]: Finished difference Result 25089 states and 62416 transitions. [2021-07-13 19:23:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:07,605 INFO L225 Difference]: With dead ends: 25089 [2021-07-13 19:23:07,605 INFO L226 Difference]: Without dead ends: 25053 [2021-07-13 19:23:07,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25053 states. [2021-07-13 19:23:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25053 to 21132. [2021-07-13 19:23:07,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.6304954805735647) internal successors, (55585), 21131 states have internal predecessors, (55585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55585 transitions. [2021-07-13 19:23:07,979 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55585 transitions. Word has length 65 [2021-07-13 19:23:07,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:07,979 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55585 transitions. [2021-07-13 19:23:07,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55585 transitions. [2021-07-13 19:23:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:07,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:07,997 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:08,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:08,198 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash -749006070, now seen corresponding path program 182 times [2021-07-13 19:23:08,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:08,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533474515] [2021-07-13 19:23:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:08,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:08,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533474515] [2021-07-13 19:23:08,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533474515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:08,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404661712] [2021-07-13 19:23:08,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:08,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:08,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:08,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:08,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:08,415 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:08,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404661712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:08,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:08,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:23:08,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148791448] [2021-07-13 19:23:08,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:23:08,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:08,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:23:08,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:08,415 INFO L87 Difference]: Start difference. First operand 21132 states and 55585 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:09,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:09,064 INFO L93 Difference]: Finished difference Result 23500 states and 60212 transitions. [2021-07-13 19:23:09,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:09,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:09,105 INFO L225 Difference]: With dead ends: 23500 [2021-07-13 19:23:09,105 INFO L226 Difference]: Without dead ends: 23462 [2021-07-13 19:23:09,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 161.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:09,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23462 states. [2021-07-13 19:23:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23462 to 21360. [2021-07-13 19:23:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21360 states, 21359 states have (on average 2.6287747553724423) internal successors, (56148), 21359 states have internal predecessors, (56148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21360 states to 21360 states and 56148 transitions. [2021-07-13 19:23:09,506 INFO L78 Accepts]: Start accepts. Automaton has 21360 states and 56148 transitions. Word has length 65 [2021-07-13 19:23:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:09,506 INFO L482 AbstractCegarLoop]: Abstraction has 21360 states and 56148 transitions. [2021-07-13 19:23:09,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 21360 states and 56148 transitions. [2021-07-13 19:23:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:09,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:09,526 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:09,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:09,726 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash 751326922, now seen corresponding path program 373 times [2021-07-13 19:23:09,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:09,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612130350] [2021-07-13 19:23:09,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:09,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:09,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612130350] [2021-07-13 19:23:09,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612130350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:09,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434186047] [2021-07-13 19:23:09,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:09,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434186047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:09,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:09,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:23:09,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789833797] [2021-07-13 19:23:09,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:23:09,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:09,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:23:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:09,958 INFO L87 Difference]: Start difference. First operand 21360 states and 56148 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:10,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:10,890 INFO L93 Difference]: Finished difference Result 22708 states and 58520 transitions. [2021-07-13 19:23:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:10,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:10,927 INFO L225 Difference]: With dead ends: 22708 [2021-07-13 19:23:10,927 INFO L226 Difference]: Without dead ends: 22616 [2021-07-13 19:23:10,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 163.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:10,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22616 states. [2021-07-13 19:23:11,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22616 to 21349. [2021-07-13 19:23:11,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21349 states, 21348 states have (on average 2.6255386921491475) internal successors, (56050), 21348 states have internal predecessors, (56050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21349 states to 21349 states and 56050 transitions. [2021-07-13 19:23:11,311 INFO L78 Accepts]: Start accepts. Automaton has 21349 states and 56050 transitions. Word has length 65 [2021-07-13 19:23:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:11,311 INFO L482 AbstractCegarLoop]: Abstraction has 21349 states and 56050 transitions. [2021-07-13 19:23:11,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 21349 states and 56050 transitions. [2021-07-13 19:23:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:11,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:11,331 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:11,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-07-13 19:23:11,531 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:11,532 INFO L82 PathProgramCache]: Analyzing trace with hash 137790742, now seen corresponding path program 374 times [2021-07-13 19:23:11,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:11,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207467545] [2021-07-13 19:23:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:23:11,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:11,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207467545] [2021-07-13 19:23:11,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207467545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:11,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583738376] [2021-07-13 19:23:11,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:11,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:11,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:11,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:11,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:23:11,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583738376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:11,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:11,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:23:11,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315466821] [2021-07-13 19:23:11,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:23:11,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:11,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:23:11,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:11,750 INFO L87 Difference]: Start difference. First operand 21349 states and 56050 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:12,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:12,411 INFO L93 Difference]: Finished difference Result 23448 states and 60119 transitions. [2021-07-13 19:23:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:12,411 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:12,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:12,451 INFO L225 Difference]: With dead ends: 23448 [2021-07-13 19:23:12,451 INFO L226 Difference]: Without dead ends: 23436 [2021-07-13 19:23:12,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23436 states. [2021-07-13 19:23:12,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23436 to 21445. [2021-07-13 19:23:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21445 states, 21444 states have (on average 2.624743518000373) internal successors, (56285), 21444 states have internal predecessors, (56285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21445 states to 21445 states and 56285 transitions. [2021-07-13 19:23:12,862 INFO L78 Accepts]: Start accepts. Automaton has 21445 states and 56285 transitions. Word has length 65 [2021-07-13 19:23:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:12,862 INFO L482 AbstractCegarLoop]: Abstraction has 21445 states and 56285 transitions. [2021-07-13 19:23:12,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 21445 states and 56285 transitions. [2021-07-13 19:23:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:12,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:12,882 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:13,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1298 [2021-07-13 19:23:13,083 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:13,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:13,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1510566761, now seen corresponding path program 375 times [2021-07-13 19:23:13,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:13,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775278289] [2021-07-13 19:23:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 64 proven. 161 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:13,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:13,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775278289] [2021-07-13 19:23:13,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775278289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:13,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596624270] [2021-07-13 19:23:13,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:13,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:23:13,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:13,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:13,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 64 proven. 161 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596624270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:13,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:13,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:23:13,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040566489] [2021-07-13 19:23:13,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:23:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:23:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:13,275 INFO L87 Difference]: Start difference. First operand 21445 states and 56285 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:13,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:13,552 INFO L93 Difference]: Finished difference Result 26049 states and 64269 transitions. [2021-07-13 19:23:13,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:13,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:13,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:13,598 INFO L225 Difference]: With dead ends: 26049 [2021-07-13 19:23:13,599 INFO L226 Difference]: Without dead ends: 26031 [2021-07-13 19:23:13,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:13,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26031 states. [2021-07-13 19:23:13,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26031 to 21412. [2021-07-13 19:23:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21412 states, 21411 states have (on average 2.622623884918967) internal successors, (56153), 21411 states have internal predecessors, (56153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:14,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21412 states to 21412 states and 56153 transitions. [2021-07-13 19:23:14,028 INFO L78 Accepts]: Start accepts. Automaton has 21412 states and 56153 transitions. Word has length 65 [2021-07-13 19:23:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:14,028 INFO L482 AbstractCegarLoop]: Abstraction has 21412 states and 56153 transitions. [2021-07-13 19:23:14,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 21412 states and 56153 transitions. [2021-07-13 19:23:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:14,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:14,048 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:14,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-07-13 19:23:14,248 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash -2015259220, now seen corresponding path program 376 times [2021-07-13 19:23:14,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:14,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375707392] [2021-07-13 19:23:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:14,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:14,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375707392] [2021-07-13 19:23:14,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375707392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:14,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351357876] [2021-07-13 19:23:14,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:14,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:14,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:14,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:14,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:14,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351357876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:14,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:14,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:23:14,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613429525] [2021-07-13 19:23:14,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:14,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:14,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:14,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:14,466 INFO L87 Difference]: Start difference. First operand 21412 states and 56153 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:15,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:15,397 INFO L93 Difference]: Finished difference Result 25666 states and 64906 transitions. [2021-07-13 19:23:15,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:23:15,397 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:15,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:15,443 INFO L225 Difference]: With dead ends: 25666 [2021-07-13 19:23:15,444 INFO L226 Difference]: Without dead ends: 25612 [2021-07-13 19:23:15,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:23:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2021-07-13 19:23:15,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 21675. [2021-07-13 19:23:15,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21675 states, 21674 states have (on average 2.6232813509273782) internal successors, (56857), 21674 states have internal predecessors, (56857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56857 transitions. [2021-07-13 19:23:15,863 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56857 transitions. Word has length 65 [2021-07-13 19:23:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:15,863 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56857 transitions. [2021-07-13 19:23:15,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56857 transitions. [2021-07-13 19:23:15,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:15,883 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:15,883 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:16,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-07-13 19:23:16,083 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:16,084 INFO L82 PathProgramCache]: Analyzing trace with hash -482700111, now seen corresponding path program 377 times [2021-07-13 19:23:16,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:16,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457840716] [2021-07-13 19:23:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 61 proven. 165 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:16,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:16,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457840716] [2021-07-13 19:23:16,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457840716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:16,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287056490] [2021-07-13 19:23:16,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:16,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-13 19:23:16,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:16,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:16,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287056490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:16,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:16,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 18 [2021-07-13 19:23:16,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324855201] [2021-07-13 19:23:16,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:23:16,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:16,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:23:16,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:23:16,308 INFO L87 Difference]: Start difference. First operand 21675 states and 56857 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:16,730 INFO L93 Difference]: Finished difference Result 26526 states and 65340 transitions. [2021-07-13 19:23:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:23:16,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:16,774 INFO L225 Difference]: With dead ends: 26526 [2021-07-13 19:23:16,774 INFO L226 Difference]: Without dead ends: 26502 [2021-07-13 19:23:16,775 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26502 states. [2021-07-13 19:23:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26502 to 21675. [2021-07-13 19:23:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21675 states, 21674 states have (on average 2.6224508627849037) internal successors, (56839), 21674 states have internal predecessors, (56839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:17,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56839 transitions. [2021-07-13 19:23:17,163 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56839 transitions. Word has length 65 [2021-07-13 19:23:17,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:17,163 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56839 transitions. [2021-07-13 19:23:17,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56839 transitions. [2021-07-13 19:23:17,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:17,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:17,182 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:17,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1303,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:17,382 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:17,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1860422686, now seen corresponding path program 378 times [2021-07-13 19:23:17,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:17,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151187787] [2021-07-13 19:23:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:17,503 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:17,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:17,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151187787] [2021-07-13 19:23:17,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151187787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:17,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129128883] [2021-07-13 19:23:17,503 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:17,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 19:23:17,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:17,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:17,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:17,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129128883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:17,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:17,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:23:17,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135023529] [2021-07-13 19:23:17,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:23:17,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:17,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:23:17,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:23:17,627 INFO L87 Difference]: Start difference. First operand 21675 states and 56839 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:18,774 INFO L93 Difference]: Finished difference Result 30486 states and 75594 transitions. [2021-07-13 19:23:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:23:18,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:18,826 INFO L225 Difference]: With dead ends: 30486 [2021-07-13 19:23:18,826 INFO L226 Difference]: Without dead ends: 30306 [2021-07-13 19:23:18,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:23:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30306 states. [2021-07-13 19:23:19,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30306 to 22166. [2021-07-13 19:23:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22166 states, 22165 states have (on average 2.6220618091585832) internal successors, (58118), 22165 states have internal predecessors, (58118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58118 transitions. [2021-07-13 19:23:19,284 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58118 transitions. Word has length 65 [2021-07-13 19:23:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:19,284 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58118 transitions. [2021-07-13 19:23:19,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58118 transitions. [2021-07-13 19:23:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:19,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:19,304 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:19,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:19,506 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:19,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:19,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1473820009, now seen corresponding path program 379 times [2021-07-13 19:23:19,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:19,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201010975] [2021-07-13 19:23:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:19,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:19,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201010975] [2021-07-13 19:23:19,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201010975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:19,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286342067] [2021-07-13 19:23:19,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:19,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:19,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286342067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:19,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:19,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:23:19,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425935182] [2021-07-13 19:23:19,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:23:19,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:19,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:23:19,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:23:19,712 INFO L87 Difference]: Start difference. First operand 22166 states and 58118 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:20,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:20,031 INFO L93 Difference]: Finished difference Result 26943 states and 66422 transitions. [2021-07-13 19:23:20,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:23:20,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:20,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:20,089 INFO L225 Difference]: With dead ends: 26943 [2021-07-13 19:23:20,089 INFO L226 Difference]: Without dead ends: 26910 [2021-07-13 19:23:20,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:23:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26910 states. [2021-07-13 19:23:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26910 to 22166. [2021-07-13 19:23:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22166 states, 22165 states have (on average 2.6216557635912476) internal successors, (58109), 22165 states have internal predecessors, (58109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58109 transitions. [2021-07-13 19:23:20,528 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58109 transitions. Word has length 65 [2021-07-13 19:23:20,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:20,528 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58109 transitions. [2021-07-13 19:23:20,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58109 transitions. [2021-07-13 19:23:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:20,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:20,548 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:20,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1308 [2021-07-13 19:23:20,748 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:20,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:20,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1920114196, now seen corresponding path program 380 times [2021-07-13 19:23:20,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:20,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51219267] [2021-07-13 19:23:20,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:20,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51219267] [2021-07-13 19:23:20,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51219267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662601697] [2021-07-13 19:23:20,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:20,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:20,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:20,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:20,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:20,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662601697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:20,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:20,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:23:20,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285071016] [2021-07-13 19:23:20,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:20,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:20,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:20,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:20,988 INFO L87 Difference]: Start difference. First operand 22166 states and 58109 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:22,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:22,579 INFO L93 Difference]: Finished difference Result 36934 states and 90171 transitions. [2021-07-13 19:23:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-07-13 19:23:22,580 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:22,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:22,650 INFO L225 Difference]: With dead ends: 36934 [2021-07-13 19:23:22,651 INFO L226 Difference]: Without dead ends: 36658 [2021-07-13 19:23:22,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 774.1ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-07-13 19:23:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36658 states. [2021-07-13 19:23:23,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36658 to 22558. [2021-07-13 19:23:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22558 states, 22557 states have (on average 2.621492219710068) internal successors, (59133), 22557 states have internal predecessors, (59133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:23,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22558 states to 22558 states and 59133 transitions. [2021-07-13 19:23:23,202 INFO L78 Accepts]: Start accepts. Automaton has 22558 states and 59133 transitions. Word has length 65 [2021-07-13 19:23:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:23,202 INFO L482 AbstractCegarLoop]: Abstraction has 22558 states and 59133 transitions. [2021-07-13 19:23:23,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 22558 states and 59133 transitions. [2021-07-13 19:23:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:23,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:23,222 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:23,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1313 [2021-07-13 19:23:23,422 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:23,423 INFO L82 PathProgramCache]: Analyzing trace with hash -26541327, now seen corresponding path program 381 times [2021-07-13 19:23:23,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:23,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418941452] [2021-07-13 19:23:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:23,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:23,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418941452] [2021-07-13 19:23:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418941452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682667151] [2021-07-13 19:23:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:23,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 19:23:23,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:23,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:23,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682667151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:23,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:23,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:23:23,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382687519] [2021-07-13 19:23:23,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:23,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:23,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:23,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:23,644 INFO L87 Difference]: Start difference. First operand 22558 states and 59133 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:23,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:23,982 INFO L93 Difference]: Finished difference Result 27397 states and 67556 transitions. [2021-07-13 19:23:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:24,040 INFO L225 Difference]: With dead ends: 27397 [2021-07-13 19:23:24,040 INFO L226 Difference]: Without dead ends: 27355 [2021-07-13 19:23:24,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:24,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2021-07-13 19:23:24,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 22069. [2021-07-13 19:23:24,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22069 states, 22068 states have (on average 2.616594163494653) internal successors, (57743), 22068 states have internal predecessors, (57743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:24,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22069 states to 22069 states and 57743 transitions. [2021-07-13 19:23:24,491 INFO L78 Accepts]: Start accepts. Automaton has 22069 states and 57743 transitions. Word has length 65 [2021-07-13 19:23:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:24,491 INFO L482 AbstractCegarLoop]: Abstraction has 22069 states and 57743 transitions. [2021-07-13 19:23:24,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:24,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22069 states and 57743 transitions. [2021-07-13 19:23:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:24,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:24,510 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:24,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:24,711 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:24,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:24,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2073428062, now seen corresponding path program 382 times [2021-07-13 19:23:24,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:24,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869649145] [2021-07-13 19:23:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:24,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:24,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869649145] [2021-07-13 19:23:24,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869649145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:24,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205994527] [2021-07-13 19:23:24,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:24,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:24,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:24,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:24,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:24,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205994527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:24,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:24,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:23:24,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959681217] [2021-07-13 19:23:24,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:24,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:24,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:24,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:24,963 INFO L87 Difference]: Start difference. First operand 22069 states and 57743 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:26,001 INFO L93 Difference]: Finished difference Result 30333 states and 75005 transitions. [2021-07-13 19:23:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:23:26,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:26,058 INFO L225 Difference]: With dead ends: 30333 [2021-07-13 19:23:26,058 INFO L226 Difference]: Without dead ends: 29955 [2021-07-13 19:23:26,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:23:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29955 states. [2021-07-13 19:23:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29955 to 20830. [2021-07-13 19:23:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20830 states, 20829 states have (on average 2.6126074223438476) internal successors, (54418), 20829 states have internal predecessors, (54418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 54418 transitions. [2021-07-13 19:23:26,486 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 54418 transitions. Word has length 65 [2021-07-13 19:23:26,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:26,486 INFO L482 AbstractCegarLoop]: Abstraction has 20830 states and 54418 transitions. [2021-07-13 19:23:26,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 54418 transitions. [2021-07-13 19:23:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:26,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:26,505 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:26,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-07-13 19:23:26,705 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1983477717, now seen corresponding path program 183 times [2021-07-13 19:23:26,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:26,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983574421] [2021-07-13 19:23:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:26,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:26,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983574421] [2021-07-13 19:23:26,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983574421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:26,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5570584] [2021-07-13 19:23:26,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:26,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-07-13 19:23:26,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:26,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:26,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:26,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5570584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:26,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:26,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:23:26,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849504003] [2021-07-13 19:23:26,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:26,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:26,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:26,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:26,897 INFO L87 Difference]: Start difference. First operand 20830 states and 54418 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:27,221 INFO L93 Difference]: Finished difference Result 26854 states and 66816 transitions. [2021-07-13 19:23:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:23:27,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:27,282 INFO L225 Difference]: With dead ends: 26854 [2021-07-13 19:23:27,283 INFO L226 Difference]: Without dead ends: 26832 [2021-07-13 19:23:27,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26832 states. [2021-07-13 19:23:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26832 to 21370. [2021-07-13 19:23:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21370 states, 21369 states have (on average 2.616406944639431) internal successors, (55910), 21369 states have internal predecessors, (55910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:27,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21370 states to 21370 states and 55910 transitions. [2021-07-13 19:23:27,707 INFO L78 Accepts]: Start accepts. Automaton has 21370 states and 55910 transitions. Word has length 65 [2021-07-13 19:23:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:27,707 INFO L482 AbstractCegarLoop]: Abstraction has 21370 states and 55910 transitions. [2021-07-13 19:23:27,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 21370 states and 55910 transitions. [2021-07-13 19:23:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:27,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:27,727 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:27,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 616 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1321 [2021-07-13 19:23:27,927 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:27,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:27,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1361597307, now seen corresponding path program 184 times [2021-07-13 19:23:27,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:27,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86382863] [2021-07-13 19:23:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:28,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:28,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86382863] [2021-07-13 19:23:28,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86382863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:28,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185209044] [2021-07-13 19:23:28,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:28,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:28,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:28,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:28,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:28,121 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:28,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185209044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:28,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:28,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:23:28,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469723171] [2021-07-13 19:23:28,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:28,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:28,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:28,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:28,122 INFO L87 Difference]: Start difference. First operand 21370 states and 55910 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:28,450 INFO L93 Difference]: Finished difference Result 33593 states and 82285 transitions. [2021-07-13 19:23:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:23:28,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:28,510 INFO L225 Difference]: With dead ends: 33593 [2021-07-13 19:23:28,511 INFO L226 Difference]: Without dead ends: 33593 [2021-07-13 19:23:28,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:23:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33593 states. [2021-07-13 19:23:28,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33593 to 21389. [2021-07-13 19:23:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21389 states, 21388 states have (on average 2.6167477089956983) internal successors, (55967), 21388 states have internal predecessors, (55967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:29,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21389 states to 21389 states and 55967 transitions. [2021-07-13 19:23:29,044 INFO L78 Accepts]: Start accepts. Automaton has 21389 states and 55967 transitions. Word has length 65 [2021-07-13 19:23:29,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:29,044 INFO L482 AbstractCegarLoop]: Abstraction has 21389 states and 55967 transitions. [2021-07-13 19:23:29,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:29,045 INFO L276 IsEmpty]: Start isEmpty. Operand 21389 states and 55967 transitions. [2021-07-13 19:23:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:29,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:29,064 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:29,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-07-13 19:23:29,265 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:29,265 INFO L82 PathProgramCache]: Analyzing trace with hash -275975149, now seen corresponding path program 185 times [2021-07-13 19:23:29,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:29,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972800011] [2021-07-13 19:23:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 171 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:29,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:29,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972800011] [2021-07-13 19:23:29,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972800011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:29,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556401994] [2021-07-13 19:23:29,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:29,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-13 19:23:29,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:29,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 173 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:29,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556401994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:29,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:29,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 24 [2021-07-13 19:23:29,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354626291] [2021-07-13 19:23:29,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:23:29,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:29,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:23:29,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:23:29,572 INFO L87 Difference]: Start difference. First operand 21389 states and 55967 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:30,267 INFO L93 Difference]: Finished difference Result 38717 states and 94084 transitions. [2021-07-13 19:23:30,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:23:30,267 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:30,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:30,340 INFO L225 Difference]: With dead ends: 38717 [2021-07-13 19:23:30,340 INFO L226 Difference]: Without dead ends: 38717 [2021-07-13 19:23:30,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=617, Invalid=1023, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:23:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38717 states. [2021-07-13 19:23:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38717 to 21452. [2021-07-13 19:23:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21452 states, 21451 states have (on average 2.6186191785930726) internal successors, (56172), 21451 states have internal predecessors, (56172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:30,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 56172 transitions. [2021-07-13 19:23:30,862 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 56172 transitions. Word has length 65 [2021-07-13 19:23:30,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:30,862 INFO L482 AbstractCegarLoop]: Abstraction has 21452 states and 56172 transitions. [2021-07-13 19:23:30,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:30,862 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 56172 transitions. [2021-07-13 19:23:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:30,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:30,881 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:31,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1324,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:31,097 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:31,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:31,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1965970313, now seen corresponding path program 186 times [2021-07-13 19:23:31,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:31,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052452932] [2021-07-13 19:23:31,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 158 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:31,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:31,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052452932] [2021-07-13 19:23:31,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052452932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:31,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938369937] [2021-07-13 19:23:31,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:31,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 19:23:31,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:31,323 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 159 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:31,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938369937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:31,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:31,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:23:31,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068582247] [2021-07-13 19:23:31,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:31,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:31,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:31,324 INFO L87 Difference]: Start difference. First operand 21452 states and 56172 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:31,807 INFO L93 Difference]: Finished difference Result 36438 states and 88848 transitions. [2021-07-13 19:23:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:23:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:31,877 INFO L225 Difference]: With dead ends: 36438 [2021-07-13 19:23:31,877 INFO L226 Difference]: Without dead ends: 36438 [2021-07-13 19:23:31,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=276, Invalid=426, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:23:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36438 states. [2021-07-13 19:23:32,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36438 to 21482. [2021-07-13 19:23:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21482 states, 21481 states have (on average 2.6190587030398955) internal successors, (56260), 21481 states have internal predecessors, (56260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21482 states to 21482 states and 56260 transitions. [2021-07-13 19:23:32,395 INFO L78 Accepts]: Start accepts. Automaton has 21482 states and 56260 transitions. Word has length 65 [2021-07-13 19:23:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:32,396 INFO L482 AbstractCegarLoop]: Abstraction has 21482 states and 56260 transitions. [2021-07-13 19:23:32,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 21482 states and 56260 transitions. [2021-07-13 19:23:32,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:32,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:32,414 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:32,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-07-13 19:23:32,614 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:32,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:32,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1289709971, now seen corresponding path program 187 times [2021-07-13 19:23:32,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:32,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712001888] [2021-07-13 19:23:32,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:32,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:32,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712001888] [2021-07-13 19:23:32,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712001888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:32,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897426720] [2021-07-13 19:23:32,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:32,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:32,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 146 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:32,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897426720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:32,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:32,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-07-13 19:23:32,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774693279] [2021-07-13 19:23:32,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:32,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:32,853 INFO L87 Difference]: Start difference. First operand 21482 states and 56260 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:33,367 INFO L93 Difference]: Finished difference Result 32841 states and 80457 transitions. [2021-07-13 19:23:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:33,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:33,433 INFO L225 Difference]: With dead ends: 32841 [2021-07-13 19:23:33,433 INFO L226 Difference]: Without dead ends: 32841 [2021-07-13 19:23:33,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 211.7ms TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32841 states. [2021-07-13 19:23:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32841 to 21485. [2021-07-13 19:23:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21485 states, 21484 states have (on average 2.618460249487991) internal successors, (56255), 21484 states have internal predecessors, (56255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21485 states to 21485 states and 56255 transitions. [2021-07-13 19:23:33,915 INFO L78 Accepts]: Start accepts. Automaton has 21485 states and 56255 transitions. Word has length 65 [2021-07-13 19:23:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:33,915 INFO L482 AbstractCegarLoop]: Abstraction has 21485 states and 56255 transitions. [2021-07-13 19:23:33,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 21485 states and 56255 transitions. [2021-07-13 19:23:33,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:33,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:33,935 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:34,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:34,136 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1985394953, now seen corresponding path program 188 times [2021-07-13 19:23:34,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:34,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984271798] [2021-07-13 19:23:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:34,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984271798] [2021-07-13 19:23:34,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984271798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444185099] [2021-07-13 19:23:34,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:34,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:34,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:34,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 133 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:34,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444185099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:34,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:34,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-07-13 19:23:34,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693484929] [2021-07-13 19:23:34,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:23:34,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:34,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:23:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:23:34,383 INFO L87 Difference]: Start difference. First operand 21485 states and 56255 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:34,876 INFO L93 Difference]: Finished difference Result 27627 states and 68779 transitions. [2021-07-13 19:23:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:23:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:34,932 INFO L225 Difference]: With dead ends: 27627 [2021-07-13 19:23:34,932 INFO L226 Difference]: Without dead ends: 27627 [2021-07-13 19:23:34,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:23:34,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27627 states. [2021-07-13 19:23:35,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27627 to 20986. [2021-07-13 19:23:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20986 states, 20985 states have (on average 2.6141053133190373) internal successors, (54857), 20985 states have internal predecessors, (54857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:35,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54857 transitions. [2021-07-13 19:23:35,369 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54857 transitions. Word has length 65 [2021-07-13 19:23:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:35,370 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54857 transitions. [2021-07-13 19:23:35,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:35,370 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54857 transitions. [2021-07-13 19:23:35,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:35,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:35,391 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:35,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:35,605 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1324010409, now seen corresponding path program 383 times [2021-07-13 19:23:35,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:35,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382587328] [2021-07-13 19:23:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:23:35,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:35,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382587328] [2021-07-13 19:23:35,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382587328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:35,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301488031] [2021-07-13 19:23:35,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:35,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 19:23:35,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:35,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:35,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 75 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:23:35,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301488031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:35,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:35,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 21 [2021-07-13 19:23:35,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395065059] [2021-07-13 19:23:35,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:23:35,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:35,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:23:35,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:23:35,983 INFO L87 Difference]: Start difference. First operand 20986 states and 54857 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:36,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:36,482 INFO L93 Difference]: Finished difference Result 25486 states and 62722 transitions. [2021-07-13 19:23:36,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:23:36,483 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:36,531 INFO L225 Difference]: With dead ends: 25486 [2021-07-13 19:23:36,531 INFO L226 Difference]: Without dead ends: 25441 [2021-07-13 19:23:36,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:23:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25441 states. [2021-07-13 19:23:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25441 to 20986. [2021-07-13 19:23:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20986 states, 20985 states have (on average 2.613676435549202) internal successors, (54848), 20985 states have internal predecessors, (54848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54848 transitions. [2021-07-13 19:23:36,929 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54848 transitions. Word has length 65 [2021-07-13 19:23:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:36,930 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54848 transitions. [2021-07-13 19:23:36,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 21 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54848 transitions. [2021-07-13 19:23:36,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:36,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:36,949 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:37,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1328,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:37,149 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:37,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:37,149 INFO L82 PathProgramCache]: Analyzing trace with hash 626281894, now seen corresponding path program 189 times [2021-07-13 19:23:37,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:37,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005338710] [2021-07-13 19:23:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:37,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:37,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005338710] [2021-07-13 19:23:37,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005338710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:37,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107914677] [2021-07-13 19:23:37,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:37,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-07-13 19:23:37,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:37,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:37,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:37,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107914677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:37,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:37,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:23:37,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446023669] [2021-07-13 19:23:37,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:23:37,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:37,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:23:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:37,374 INFO L87 Difference]: Start difference. First operand 20986 states and 54848 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:38,027 INFO L93 Difference]: Finished difference Result 23249 states and 59286 transitions. [2021-07-13 19:23:38,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:38,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:38,067 INFO L225 Difference]: With dead ends: 23249 [2021-07-13 19:23:38,067 INFO L226 Difference]: Without dead ends: 23218 [2021-07-13 19:23:38,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:38,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23218 states. [2021-07-13 19:23:38,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23218 to 21247. [2021-07-13 19:23:38,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21247 states, 21246 states have (on average 2.6115974771721735) internal successors, (55486), 21246 states have internal predecessors, (55486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21247 states to 21247 states and 55486 transitions. [2021-07-13 19:23:38,472 INFO L78 Accepts]: Start accepts. Automaton has 21247 states and 55486 transitions. Word has length 65 [2021-07-13 19:23:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:38,472 INFO L482 AbstractCegarLoop]: Abstraction has 21247 states and 55486 transitions. [2021-07-13 19:23:38,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:38,472 INFO L276 IsEmpty]: Start isEmpty. Operand 21247 states and 55486 transitions. [2021-07-13 19:23:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:38,492 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:38,492 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:38,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-07-13 19:23:38,692 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:38,692 INFO L82 PathProgramCache]: Analyzing trace with hash -927414963, now seen corresponding path program 384 times [2021-07-13 19:23:38,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:38,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127605622] [2021-07-13 19:23:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:23:38,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:38,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127605622] [2021-07-13 19:23:38,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127605622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:38,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956419014] [2021-07-13 19:23:38,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:38,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 19:23:38,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:38,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:23:38,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956419014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:38,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:38,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-13 19:23:38,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755111251] [2021-07-13 19:23:38,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:23:38,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:38,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:23:38,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:23:38,871 INFO L87 Difference]: Start difference. First operand 21247 states and 55486 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:39,105 INFO L93 Difference]: Finished difference Result 26072 states and 63936 transitions. [2021-07-13 19:23:39,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:23:39,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:39,163 INFO L225 Difference]: With dead ends: 26072 [2021-07-13 19:23:39,163 INFO L226 Difference]: Without dead ends: 26069 [2021-07-13 19:23:39,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:39,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26069 states. [2021-07-13 19:23:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26069 to 21233. [2021-07-13 19:23:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21233 states, 21232 states have (on average 2.610634890730972) internal successors, (55429), 21232 states have internal predecessors, (55429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55429 transitions. [2021-07-13 19:23:39,567 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55429 transitions. Word has length 65 [2021-07-13 19:23:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:39,567 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55429 transitions. [2021-07-13 19:23:39,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55429 transitions. [2021-07-13 19:23:39,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:39,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:39,587 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:39,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-07-13 19:23:39,788 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:39,788 INFO L82 PathProgramCache]: Analyzing trace with hash -720352397, now seen corresponding path program 385 times [2021-07-13 19:23:39,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:39,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024947839] [2021-07-13 19:23:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:23:39,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:39,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024947839] [2021-07-13 19:23:39,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024947839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:39,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567389520] [2021-07-13 19:23:39,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:39,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:23:39,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567389520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:39,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:39,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:23:39,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820936815] [2021-07-13 19:23:39,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:23:39,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:39,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:23:39,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:39,974 INFO L87 Difference]: Start difference. First operand 21233 states and 55429 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:40,232 INFO L93 Difference]: Finished difference Result 26094 states and 63928 transitions. [2021-07-13 19:23:40,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:23:40,233 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:40,282 INFO L225 Difference]: With dead ends: 26094 [2021-07-13 19:23:40,282 INFO L226 Difference]: Without dead ends: 26076 [2021-07-13 19:23:40,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26076 states. [2021-07-13 19:23:40,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26076 to 21233. [2021-07-13 19:23:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21233 states, 21232 states have (on average 2.609410324039186) internal successors, (55403), 21232 states have internal predecessors, (55403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55403 transitions. [2021-07-13 19:23:40,758 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55403 transitions. Word has length 65 [2021-07-13 19:23:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:40,758 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55403 transitions. [2021-07-13 19:23:40,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:40,758 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55403 transitions. [2021-07-13 19:23:40,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:40,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:40,777 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:40,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1338,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:40,978 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2126614886, now seen corresponding path program 386 times [2021-07-13 19:23:40,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:40,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232101489] [2021-07-13 19:23:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:41,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:41,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232101489] [2021-07-13 19:23:41,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232101489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:41,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962299815] [2021-07-13 19:23:41,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:41,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:41,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:41,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:41,197 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:41,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962299815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:41,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:41,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:23:41,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294113312] [2021-07-13 19:23:41,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:23:41,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:41,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:23:41,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:41,198 INFO L87 Difference]: Start difference. First operand 21233 states and 55403 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:42,111 INFO L93 Difference]: Finished difference Result 22551 states and 57719 transitions. [2021-07-13 19:23:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:42,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:42,149 INFO L225 Difference]: With dead ends: 22551 [2021-07-13 19:23:42,150 INFO L226 Difference]: Without dead ends: 22441 [2021-07-13 19:23:42,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:42,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22441 states. [2021-07-13 19:23:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22441 to 21246. [2021-07-13 19:23:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21246 states, 21245 states have (on average 2.604801129677571) internal successors, (55339), 21245 states have internal predecessors, (55339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21246 states to 21246 states and 55339 transitions. [2021-07-13 19:23:42,545 INFO L78 Accepts]: Start accepts. Automaton has 21246 states and 55339 transitions. Word has length 65 [2021-07-13 19:23:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:42,545 INFO L482 AbstractCegarLoop]: Abstraction has 21246 states and 55339 transitions. [2021-07-13 19:23:42,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 21246 states and 55339 transitions. [2021-07-13 19:23:42,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:42,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:42,564 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:42,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-07-13 19:23:42,764 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:42,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1513078706, now seen corresponding path program 387 times [2021-07-13 19:23:42,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:42,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853824850] [2021-07-13 19:23:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:23:42,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:42,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853824850] [2021-07-13 19:23:42,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853824850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:42,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987872693] [2021-07-13 19:23:42,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:42,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-07-13 19:23:42,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:42,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:42,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:23:42,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987872693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:42,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:42,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:23:42,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278584036] [2021-07-13 19:23:42,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:23:42,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:42,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:23:42,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:23:42,987 INFO L87 Difference]: Start difference. First operand 21246 states and 55339 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:43,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:43,663 INFO L93 Difference]: Finished difference Result 23355 states and 59455 transitions. [2021-07-13 19:23:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:23:43,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:43,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:43,705 INFO L225 Difference]: With dead ends: 23355 [2021-07-13 19:23:43,705 INFO L226 Difference]: Without dead ends: 23343 [2021-07-13 19:23:43,705 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:43,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23343 states. [2021-07-13 19:23:44,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23343 to 21366. [2021-07-13 19:23:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21366 states, 21365 states have (on average 2.604165691551603) internal successors, (55638), 21365 states have internal predecessors, (55638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21366 states to 21366 states and 55638 transitions. [2021-07-13 19:23:44,100 INFO L78 Accepts]: Start accepts. Automaton has 21366 states and 55638 transitions. Word has length 65 [2021-07-13 19:23:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:44,101 INFO L482 AbstractCegarLoop]: Abstraction has 21366 states and 55638 transitions. [2021-07-13 19:23:44,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21366 states and 55638 transitions. [2021-07-13 19:23:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:44,121 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:44,121 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:44,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-07-13 19:23:44,321 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:44,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:44,321 INFO L82 PathProgramCache]: Analyzing trace with hash -639971256, now seen corresponding path program 388 times [2021-07-13 19:23:44,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:44,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872027835] [2021-07-13 19:23:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:44,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:44,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872027835] [2021-07-13 19:23:44,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872027835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:44,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785455781] [2021-07-13 19:23:44,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:44,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:44,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:44,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:44,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:44,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785455781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:44,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:44,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:23:44,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786613250] [2021-07-13 19:23:44,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:23:44,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:44,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:23:44,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:23:44,555 INFO L87 Difference]: Start difference. First operand 21366 states and 55638 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:45,507 INFO L93 Difference]: Finished difference Result 25787 states and 64793 transitions. [2021-07-13 19:23:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:23:45,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:45,564 INFO L225 Difference]: With dead ends: 25787 [2021-07-13 19:23:45,564 INFO L226 Difference]: Without dead ends: 25733 [2021-07-13 19:23:45,564 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:23:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25733 states. [2021-07-13 19:23:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25733 to 21713. [2021-07-13 19:23:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21713 states, 21712 states have (on average 2.6057479734708915) internal successors, (56576), 21712 states have internal predecessors, (56576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56576 transitions. [2021-07-13 19:23:45,988 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56576 transitions. Word has length 65 [2021-07-13 19:23:45,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:45,988 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56576 transitions. [2021-07-13 19:23:45,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56576 transitions. [2021-07-13 19:23:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:46,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:46,006 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:46,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-07-13 19:23:46,207 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash 892587853, now seen corresponding path program 389 times [2021-07-13 19:23:46,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:46,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210576204] [2021-07-13 19:23:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:46,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:46,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210576204] [2021-07-13 19:23:46,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210576204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:46,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747301101] [2021-07-13 19:23:46,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:46,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-13 19:23:46,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:46,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747301101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:46,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:46,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 17 [2021-07-13 19:23:46,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992206525] [2021-07-13 19:23:46,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:23:46,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:46,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:23:46,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:23:46,429 INFO L87 Difference]: Start difference. First operand 21713 states and 56576 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:46,785 INFO L93 Difference]: Finished difference Result 26779 states and 65477 transitions. [2021-07-13 19:23:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:23:46,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:46,841 INFO L225 Difference]: With dead ends: 26779 [2021-07-13 19:23:46,841 INFO L226 Difference]: Without dead ends: 26755 [2021-07-13 19:23:46,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:46,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26755 states. [2021-07-13 19:23:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26755 to 21713. [2021-07-13 19:23:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21713 states, 21712 states have (on average 2.604918938835667) internal successors, (56558), 21712 states have internal predecessors, (56558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56558 transitions. [2021-07-13 19:23:47,323 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56558 transitions. Word has length 65 [2021-07-13 19:23:47,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:47,323 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56558 transitions. [2021-07-13 19:23:47,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56558 transitions. [2021-07-13 19:23:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:47,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:47,342 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:47,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1344,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:47,542 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:47,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:47,543 INFO L82 PathProgramCache]: Analyzing trace with hash -485134722, now seen corresponding path program 390 times [2021-07-13 19:23:47,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:47,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935968079] [2021-07-13 19:23:47,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:47,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935968079] [2021-07-13 19:23:47,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935968079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104593820] [2021-07-13 19:23:47,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:47,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-13 19:23:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:47,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:47,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:47,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104593820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:47,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:47,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:23:47,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680030722] [2021-07-13 19:23:47,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:23:47,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:23:47,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:23:47,775 INFO L87 Difference]: Start difference. First operand 21713 states and 56558 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:49,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:49,020 INFO L93 Difference]: Finished difference Result 30965 states and 76348 transitions. [2021-07-13 19:23:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-13 19:23:49,021 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:49,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:49,075 INFO L225 Difference]: With dead ends: 30965 [2021-07-13 19:23:49,075 INFO L226 Difference]: Without dead ends: 30797 [2021-07-13 19:23:49,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 494.4ms TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:23:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30797 states. [2021-07-13 19:23:49,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30797 to 22408. [2021-07-13 19:23:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22408 states, 22407 states have (on average 2.60543580131209) internal successors, (58380), 22407 states have internal predecessors, (58380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58380 transitions. [2021-07-13 19:23:49,565 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58380 transitions. Word has length 65 [2021-07-13 19:23:49,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:49,565 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58380 transitions. [2021-07-13 19:23:49,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58380 transitions. [2021-07-13 19:23:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:49,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:49,584 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:49,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1348,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:49,785 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:49,785 INFO L82 PathProgramCache]: Analyzing trace with hash -98532045, now seen corresponding path program 391 times [2021-07-13 19:23:49,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:49,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522767421] [2021-07-13 19:23:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 54 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:49,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:49,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522767421] [2021-07-13 19:23:49,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522767421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:49,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741045142] [2021-07-13 19:23:49,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 54 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:49,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741045142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:49,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:49,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:23:49,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114277724] [2021-07-13 19:23:49,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:23:49,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:23:49,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:23:49,986 INFO L87 Difference]: Start difference. First operand 22408 states and 58380 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:50,319 INFO L93 Difference]: Finished difference Result 27475 states and 67252 transitions. [2021-07-13 19:23:50,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:23:50,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:50,369 INFO L225 Difference]: With dead ends: 27475 [2021-07-13 19:23:50,369 INFO L226 Difference]: Without dead ends: 27442 [2021-07-13 19:23:50,369 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:23:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27442 states. [2021-07-13 19:23:50,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27442 to 22408. [2021-07-13 19:23:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22408 states, 22407 states have (on average 2.605034141116615) internal successors, (58371), 22407 states have internal predecessors, (58371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58371 transitions. [2021-07-13 19:23:50,803 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58371 transitions. Word has length 65 [2021-07-13 19:23:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:50,803 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58371 transitions. [2021-07-13 19:23:50,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58371 transitions. [2021-07-13 19:23:50,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:50,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:50,822 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:51,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1349 [2021-07-13 19:23:51,023 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:51,023 INFO L82 PathProgramCache]: Analyzing trace with hash -544826232, now seen corresponding path program 392 times [2021-07-13 19:23:51,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:51,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481663480] [2021-07-13 19:23:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:51,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:51,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481663480] [2021-07-13 19:23:51,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481663480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:51,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685576348] [2021-07-13 19:23:51,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:51,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:23:51,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:51,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:51,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:51,276 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:51,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685576348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:51,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:51,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:23:51,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730404739] [2021-07-13 19:23:51,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:51,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:51,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:51,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:51,277 INFO L87 Difference]: Start difference. First operand 22408 states and 58371 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:53,251 INFO L93 Difference]: Finished difference Result 41984 states and 101118 transitions. [2021-07-13 19:23:53,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-13 19:23:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:53,332 INFO L225 Difference]: With dead ends: 41984 [2021-07-13 19:23:53,333 INFO L226 Difference]: Without dead ends: 41462 [2021-07-13 19:23:53,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1032.7ms TimeCoverageRelationStatistics Valid=663, Invalid=6477, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 19:23:53,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41462 states. [2021-07-13 19:23:54,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41462 to 23564. [2021-07-13 19:23:54,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23564 states, 23563 states have (on average 2.604252429656665) internal successors, (61364), 23563 states have internal predecessors, (61364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61364 transitions. [2021-07-13 19:23:54,094 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61364 transitions. Word has length 65 [2021-07-13 19:23:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:54,094 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61364 transitions. [2021-07-13 19:23:54,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:54,094 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61364 transitions. [2021-07-13 19:23:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:54,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:54,115 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:54,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 632 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-07-13 19:23:54,329 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1348746637, now seen corresponding path program 393 times [2021-07-13 19:23:54,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:54,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588884215] [2021-07-13 19:23:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:54,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588884215] [2021-07-13 19:23:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588884215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549577731] [2021-07-13 19:23:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:54,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-13 19:23:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:54,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:23:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:23:54,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549577731] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:54,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:54,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:23:54,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212857282] [2021-07-13 19:23:54,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:23:54,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:54,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:23:54,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:23:54,551 INFO L87 Difference]: Start difference. First operand 23564 states and 61364 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:54,872 INFO L93 Difference]: Finished difference Result 28863 states and 70675 transitions. [2021-07-13 19:23:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:23:54,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:54,933 INFO L225 Difference]: With dead ends: 28863 [2021-07-13 19:23:54,933 INFO L226 Difference]: Without dead ends: 28821 [2021-07-13 19:23:54,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:23:54,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28821 states. [2021-07-13 19:23:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28821 to 23564. [2021-07-13 19:23:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23564 states, 23563 states have (on average 2.6038704748970845) internal successors, (61355), 23563 states have internal predecessors, (61355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:55,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61355 transitions. [2021-07-13 19:23:55,547 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61355 transitions. Word has length 65 [2021-07-13 19:23:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:23:55,547 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61355 transitions. [2021-07-13 19:23:55,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61355 transitions. [2021-07-13 19:23:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:23:55,566 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:23:55,566 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:23:55,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-07-13 19:23:55,781 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:23:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:23:55,781 INFO L82 PathProgramCache]: Analyzing trace with hash -698140098, now seen corresponding path program 394 times [2021-07-13 19:23:55,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:23:55,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724105606] [2021-07-13 19:23:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:23:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:23:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:55,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:23:55,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724105606] [2021-07-13 19:23:55,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724105606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:55,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000599263] [2021-07-13 19:23:55,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:23:55,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:23:55,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:23:55,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:23:55,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:23:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:23:56,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000599263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:23:56,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:23:56,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:23:56,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604617526] [2021-07-13 19:23:56,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:23:56,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:23:56,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:23:56,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:23:56,051 INFO L87 Difference]: Start difference. First operand 23564 states and 61355 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:23:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:23:59,137 INFO L93 Difference]: Finished difference Result 53425 states and 127611 transitions. [2021-07-13 19:23:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-07-13 19:23:59,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:23:59,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:23:59,248 INFO L225 Difference]: With dead ends: 53425 [2021-07-13 19:23:59,248 INFO L226 Difference]: Without dead ends: 52807 [2021-07-13 19:23:59,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 2019.7ms TimeCoverageRelationStatistics Valid=1473, Invalid=16083, Unknown=0, NotChecked=0, Total=17556 [2021-07-13 19:23:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52807 states. [2021-07-13 19:24:00,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52807 to 24483. [2021-07-13 19:24:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24483 states, 24482 states have (on average 2.6029327669308064) internal successors, (63725), 24482 states have internal predecessors, (63725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24483 states to 24483 states and 63725 transitions. [2021-07-13 19:24:00,120 INFO L78 Accepts]: Start accepts. Automaton has 24483 states and 63725 transitions. Word has length 65 [2021-07-13 19:24:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:00,120 INFO L482 AbstractCegarLoop]: Abstraction has 24483 states and 63725 transitions. [2021-07-13 19:24:00,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 24483 states and 63725 transitions. [2021-07-13 19:24:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:00,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:00,141 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:00,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:00,342 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash 51277555, now seen corresponding path program 395 times [2021-07-13 19:24:00,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:00,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59662404] [2021-07-13 19:24:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:00,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:00,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59662404] [2021-07-13 19:24:00,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59662404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:00,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431070084] [2021-07-13 19:24:00,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:00,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 19:24:00,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:00,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:00,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:00,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431070084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:00,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:00,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 20 [2021-07-13 19:24:00,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504356422] [2021-07-13 19:24:00,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:24:00,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:00,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:24:00,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:00,726 INFO L87 Difference]: Start difference. First operand 24483 states and 63725 transitions. Second operand has 21 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:01,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:01,186 INFO L93 Difference]: Finished difference Result 30034 states and 73553 transitions. [2021-07-13 19:24:01,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:24:01,187 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:01,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:01,241 INFO L225 Difference]: With dead ends: 30034 [2021-07-13 19:24:01,241 INFO L226 Difference]: Without dead ends: 29983 [2021-07-13 19:24:01,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:24:01,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29983 states. [2021-07-13 19:24:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29983 to 24023. [2021-07-13 19:24:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24023 states, 24022 states have (on average 2.59903421863292) internal successors, (62434), 24022 states have internal predecessors, (62434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24023 states to 24023 states and 62434 transitions. [2021-07-13 19:24:01,729 INFO L78 Accepts]: Start accepts. Automaton has 24023 states and 62434 transitions. Word has length 65 [2021-07-13 19:24:01,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:01,729 INFO L482 AbstractCegarLoop]: Abstraction has 24023 states and 62434 transitions. [2021-07-13 19:24:01,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.190476190476191) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:01,729 INFO L276 IsEmpty]: Start isEmpty. Operand 24023 states and 62434 transitions. [2021-07-13 19:24:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:01,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:01,752 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:01,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:01,952 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1773680840, now seen corresponding path program 396 times [2021-07-13 19:24:01,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:01,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738473145] [2021-07-13 19:24:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:02,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:02,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738473145] [2021-07-13 19:24:02,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738473145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:02,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49232216] [2021-07-13 19:24:02,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:02,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-07-13 19:24:02,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:02,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:02,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:02,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49232216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:02,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:02,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-13 19:24:02,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28113412] [2021-07-13 19:24:02,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:02,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:02,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:02,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:02,236 INFO L87 Difference]: Start difference. First operand 24023 states and 62434 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:03,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:03,364 INFO L93 Difference]: Finished difference Result 34769 states and 84689 transitions. [2021-07-13 19:24:03,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:24:03,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:03,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:03,434 INFO L225 Difference]: With dead ends: 34769 [2021-07-13 19:24:03,434 INFO L226 Difference]: Without dead ends: 33929 [2021-07-13 19:24:03,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 389.8ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:24:03,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33929 states. [2021-07-13 19:24:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33929 to 20717. [2021-07-13 19:24:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20717 states, 20716 states have (on average 2.5939370534852286) internal successors, (53736), 20716 states have internal predecessors, (53736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:03,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20717 states to 20717 states and 53736 transitions. [2021-07-13 19:24:03,895 INFO L78 Accepts]: Start accepts. Automaton has 20717 states and 53736 transitions. Word has length 65 [2021-07-13 19:24:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:03,895 INFO L482 AbstractCegarLoop]: Abstraction has 20717 states and 53736 transitions. [2021-07-13 19:24:03,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:03,895 INFO L276 IsEmpty]: Start isEmpty. Operand 20717 states and 53736 transitions. [2021-07-13 19:24:03,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:03,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:03,915 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:04,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1369 [2021-07-13 19:24:04,131 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:04,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1535619323, now seen corresponding path program 190 times [2021-07-13 19:24:04,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:04,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45005230] [2021-07-13 19:24:04,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:04,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:04,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45005230] [2021-07-13 19:24:04,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45005230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:04,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639859488] [2021-07-13 19:24:04,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:04,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:04,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 176 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:04,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639859488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:04,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:04,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:24:04,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942175508] [2021-07-13 19:24:04,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:24:04,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:24:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:24:04,423 INFO L87 Difference]: Start difference. First operand 20717 states and 53736 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:04,728 INFO L93 Difference]: Finished difference Result 25901 states and 64415 transitions. [2021-07-13 19:24:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:04,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:04,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:04,777 INFO L225 Difference]: With dead ends: 25901 [2021-07-13 19:24:04,777 INFO L226 Difference]: Without dead ends: 25881 [2021-07-13 19:24:04,777 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:24:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25881 states. [2021-07-13 19:24:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25881 to 21398. [2021-07-13 19:24:05,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21398 states, 21397 states have (on average 2.5984951161377765) internal successors, (55600), 21397 states have internal predecessors, (55600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21398 states to 21398 states and 55600 transitions. [2021-07-13 19:24:05,183 INFO L78 Accepts]: Start accepts. Automaton has 21398 states and 55600 transitions. Word has length 65 [2021-07-13 19:24:05,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:05,183 INFO L482 AbstractCegarLoop]: Abstraction has 21398 states and 55600 transitions. [2021-07-13 19:24:05,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 21398 states and 55600 transitions. [2021-07-13 19:24:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:05,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:05,202 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:05,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1370,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:05,403 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:05,403 INFO L82 PathProgramCache]: Analyzing trace with hash 913738913, now seen corresponding path program 191 times [2021-07-13 19:24:05,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:05,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965387729] [2021-07-13 19:24:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:05,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:05,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965387729] [2021-07-13 19:24:05,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965387729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:05,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828665259] [2021-07-13 19:24:05,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:05,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-13 19:24:05,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:05,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:05,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:05,806 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 177 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:24:05,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828665259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:05,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:05,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 24 [2021-07-13 19:24:05,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473087101] [2021-07-13 19:24:05,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:24:05,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:05,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:24:05,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=365, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:24:05,806 INFO L87 Difference]: Start difference. First operand 21398 states and 55600 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:06,471 INFO L93 Difference]: Finished difference Result 34523 states and 84310 transitions. [2021-07-13 19:24:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:24:06,471 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:06,532 INFO L225 Difference]: With dead ends: 34523 [2021-07-13 19:24:06,532 INFO L226 Difference]: Without dead ends: 34523 [2021-07-13 19:24:06,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=591, Invalid=891, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:24:06,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34523 states. [2021-07-13 19:24:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34523 to 21413. [2021-07-13 19:24:07,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21413 states, 21412 states have (on average 2.5987763870726694) internal successors, (55645), 21412 states have internal predecessors, (55645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55645 transitions. [2021-07-13 19:24:07,183 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55645 transitions. Word has length 65 [2021-07-13 19:24:07,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:07,183 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55645 transitions. [2021-07-13 19:24:07,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:07,183 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55645 transitions. [2021-07-13 19:24:07,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:07,206 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:07,206 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:07,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:07,414 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:07,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:07,414 INFO L82 PathProgramCache]: Analyzing trace with hash -723833543, now seen corresponding path program 192 times [2021-07-13 19:24:07,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:07,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828687311] [2021-07-13 19:24:07,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 173 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:07,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:07,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828687311] [2021-07-13 19:24:07,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828687311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:07,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158190442] [2021-07-13 19:24:07,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:07,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-07-13 19:24:07,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:07,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:07,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:07,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158190442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:07,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:07,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:24:07,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498247535] [2021-07-13 19:24:07,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:24:07,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:07,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:24:07,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:07,633 INFO L87 Difference]: Start difference. First operand 21413 states and 55645 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:08,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:08,090 INFO L93 Difference]: Finished difference Result 36708 states and 89413 transitions. [2021-07-13 19:24:08,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:24:08,090 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:08,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:08,158 INFO L225 Difference]: With dead ends: 36708 [2021-07-13 19:24:08,158 INFO L226 Difference]: Without dead ends: 36708 [2021-07-13 19:24:08,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:24:08,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36708 states. [2021-07-13 19:24:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36708 to 21464. [2021-07-13 19:24:08,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21464 states, 21463 states have (on average 2.600288869216792) internal successors, (55810), 21463 states have internal predecessors, (55810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:08,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 55810 transitions. [2021-07-13 19:24:08,750 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 55810 transitions. Word has length 65 [2021-07-13 19:24:08,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:08,750 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 55810 transitions. [2021-07-13 19:24:08,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:08,750 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 55810 transitions. [2021-07-13 19:24:08,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:08,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:08,770 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:08,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:08,970 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:08,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:08,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1881138589, now seen corresponding path program 193 times [2021-07-13 19:24:08,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:08,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940218799] [2021-07-13 19:24:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:09,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:09,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940218799] [2021-07-13 19:24:09,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940218799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:09,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823052003] [2021-07-13 19:24:09,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 164 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:09,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823052003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:09,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:09,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:24:09,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945911240] [2021-07-13 19:24:09,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:24:09,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:09,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:24:09,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:24:09,269 INFO L87 Difference]: Start difference. First operand 21464 states and 55810 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:09,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:09,844 INFO L93 Difference]: Finished difference Result 37797 states and 91974 transitions. [2021-07-13 19:24:09,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:24:09,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:09,917 INFO L225 Difference]: With dead ends: 37797 [2021-07-13 19:24:09,918 INFO L226 Difference]: Without dead ends: 37797 [2021-07-13 19:24:09,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:24:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37797 states. [2021-07-13 19:24:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37797 to 21524. [2021-07-13 19:24:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21524 states, 21523 states have (on average 2.601960693211913) internal successors, (56002), 21523 states have internal predecessors, (56002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21524 states to 21524 states and 56002 transitions. [2021-07-13 19:24:10,425 INFO L78 Accepts]: Start accepts. Automaton has 21524 states and 56002 transitions. Word has length 65 [2021-07-13 19:24:10,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:10,425 INFO L482 AbstractCegarLoop]: Abstraction has 21524 states and 56002 transitions. [2021-07-13 19:24:10,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:10,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21524 states and 56002 transitions. [2021-07-13 19:24:10,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:10,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:10,444 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:10,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-07-13 19:24:10,644 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:10,644 INFO L82 PathProgramCache]: Analyzing trace with hash 841851577, now seen corresponding path program 194 times [2021-07-13 19:24:10,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:10,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009046252] [2021-07-13 19:24:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:10,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:10,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009046252] [2021-07-13 19:24:10,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009046252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:10,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569890353] [2021-07-13 19:24:10,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:10,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:10,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:10,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:10,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:10,881 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:10,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569890353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:10,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:10,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-07-13 19:24:10,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823344306] [2021-07-13 19:24:10,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:10,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:10,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:10,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:10,882 INFO L87 Difference]: Start difference. First operand 21524 states and 56002 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:11,537 INFO L93 Difference]: Finished difference Result 36105 states and 88048 transitions. [2021-07-13 19:24:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:24:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:11,603 INFO L225 Difference]: With dead ends: 36105 [2021-07-13 19:24:11,603 INFO L226 Difference]: Without dead ends: 36105 [2021-07-13 19:24:11,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=381, Invalid=611, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:24:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36105 states. [2021-07-13 19:24:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36105 to 21553. [2021-07-13 19:24:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21553 states, 21552 states have (on average 2.6023106904231628) internal successors, (56085), 21552 states have internal predecessors, (56085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:12,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21553 states to 21553 states and 56085 transitions. [2021-07-13 19:24:12,137 INFO L78 Accepts]: Start accepts. Automaton has 21553 states and 56085 transitions. Word has length 65 [2021-07-13 19:24:12,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:12,137 INFO L482 AbstractCegarLoop]: Abstraction has 21553 states and 56085 transitions. [2021-07-13 19:24:12,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:12,137 INFO L276 IsEmpty]: Start isEmpty. Operand 21553 states and 56085 transitions. [2021-07-13 19:24:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:12,158 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:12,158 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:12,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-07-13 19:24:12,366 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:12,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1861713949, now seen corresponding path program 195 times [2021-07-13 19:24:12,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:12,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571911822] [2021-07-13 19:24:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 143 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:12,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:12,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571911822] [2021-07-13 19:24:12,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571911822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:12,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176818815] [2021-07-13 19:24:12,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:12,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-13 19:24:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:12,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:24:12,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 184 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:12,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176818815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:12,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:12,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 22 [2021-07-13 19:24:12,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739832865] [2021-07-13 19:24:12,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:24:12,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:12,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:24:12,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:12,680 INFO L87 Difference]: Start difference. First operand 21553 states and 56085 transitions. Second operand has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:13,282 INFO L93 Difference]: Finished difference Result 25993 states and 64689 transitions. [2021-07-13 19:24:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:24:13,282 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:13,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:13,323 INFO L225 Difference]: With dead ends: 25993 [2021-07-13 19:24:13,323 INFO L226 Difference]: Without dead ends: 25993 [2021-07-13 19:24:13,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:24:13,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25993 states. [2021-07-13 19:24:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25993 to 20708. [2021-07-13 19:24:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20708 states, 20707 states have (on average 2.595257642343169) internal successors, (53740), 20707 states have internal predecessors, (53740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53740 transitions. [2021-07-13 19:24:13,687 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53740 transitions. Word has length 65 [2021-07-13 19:24:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:13,687 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53740 transitions. [2021-07-13 19:24:13,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53740 transitions. [2021-07-13 19:24:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:13,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:13,709 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:13,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-07-13 19:24:13,910 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:13,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:13,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1855519693, now seen corresponding path program 397 times [2021-07-13 19:24:13,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:13,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722312691] [2021-07-13 19:24:13,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:14,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:14,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722312691] [2021-07-13 19:24:14,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722312691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:14,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109522747] [2021-07-13 19:24:14,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:14,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109522747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:14,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:14,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-13 19:24:14,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937181968] [2021-07-13 19:24:14,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:14,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:14,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:14,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:14,233 INFO L87 Difference]: Start difference. First operand 20708 states and 53740 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:14,635 INFO L93 Difference]: Finished difference Result 25213 states and 61593 transitions. [2021-07-13 19:24:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:24:14,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:14,679 INFO L225 Difference]: With dead ends: 25213 [2021-07-13 19:24:14,679 INFO L226 Difference]: Without dead ends: 25159 [2021-07-13 19:24:14,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:24:14,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25159 states. [2021-07-13 19:24:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25159 to 20708. [2021-07-13 19:24:15,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20708 states, 20707 states have (on average 2.594823006712706) internal successors, (53731), 20707 states have internal predecessors, (53731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53731 transitions. [2021-07-13 19:24:15,098 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53731 transitions. Word has length 65 [2021-07-13 19:24:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:15,098 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53731 transitions. [2021-07-13 19:24:15,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53731 transitions. [2021-07-13 19:24:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:15,118 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:15,118 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:15,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-07-13 19:24:15,318 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:15,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2136980874, now seen corresponding path program 196 times [2021-07-13 19:24:15,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:15,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945398712] [2021-07-13 19:24:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:15,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945398712] [2021-07-13 19:24:15,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945398712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498100744] [2021-07-13 19:24:15,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:15,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:15,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:15,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:15,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498100744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:15,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:15,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:24:15,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612546232] [2021-07-13 19:24:15,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:15,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:15,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:15,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:15,537 INFO L87 Difference]: Start difference. First operand 20708 states and 53731 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:16,239 INFO L93 Difference]: Finished difference Result 22901 states and 58040 transitions. [2021-07-13 19:24:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:24:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:16,282 INFO L225 Difference]: With dead ends: 22901 [2021-07-13 19:24:16,282 INFO L226 Difference]: Without dead ends: 22879 [2021-07-13 19:24:16,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22879 states. [2021-07-13 19:24:16,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22879 to 21011. [2021-07-13 19:24:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21011 states, 21010 states have (on average 2.5923845787720134) internal successors, (54466), 21010 states have internal predecessors, (54466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 54466 transitions. [2021-07-13 19:24:16,709 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 54466 transitions. Word has length 65 [2021-07-13 19:24:16,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:16,709 INFO L482 AbstractCegarLoop]: Abstraction has 21011 states and 54466 transitions. [2021-07-13 19:24:16,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 54466 transitions. [2021-07-13 19:24:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:16,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:16,728 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:16,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-07-13 19:24:16,928 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash -657653430, now seen corresponding path program 398 times [2021-07-13 19:24:16,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:16,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368266700] [2021-07-13 19:24:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:17,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:17,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368266700] [2021-07-13 19:24:17,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368266700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:17,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617621350] [2021-07-13 19:24:17,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:17,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:17,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:17,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:17,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:17,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617621350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:17,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:17,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:24:17,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581560413] [2021-07-13 19:24:17,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:17,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:17,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:17,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:17,167 INFO L87 Difference]: Start difference. First operand 21011 states and 54466 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:18,277 INFO L93 Difference]: Finished difference Result 22325 states and 56767 transitions. [2021-07-13 19:24:18,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:24:18,278 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:18,316 INFO L225 Difference]: With dead ends: 22325 [2021-07-13 19:24:18,316 INFO L226 Difference]: Without dead ends: 22197 [2021-07-13 19:24:18,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22197 states. [2021-07-13 19:24:18,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22197 to 21057. [2021-07-13 19:24:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21057 states, 21056 states have (on average 2.585723784194529) internal successors, (54445), 21056 states have internal predecessors, (54445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21057 states to 21057 states and 54445 transitions. [2021-07-13 19:24:18,699 INFO L78 Accepts]: Start accepts. Automaton has 21057 states and 54445 transitions. Word has length 65 [2021-07-13 19:24:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:18,700 INFO L482 AbstractCegarLoop]: Abstraction has 21057 states and 54445 transitions. [2021-07-13 19:24:18,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 21057 states and 54445 transitions. [2021-07-13 19:24:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:18,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:18,719 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:18,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-07-13 19:24:18,929 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:18,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1271189610, now seen corresponding path program 399 times [2021-07-13 19:24:18,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:18,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311309037] [2021-07-13 19:24:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:24:19,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:19,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311309037] [2021-07-13 19:24:19,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311309037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:19,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379324795] [2021-07-13 19:24:19,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:19,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-13 19:24:19,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:19,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:19,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:19,325 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:24:19,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379324795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:19,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:19,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:24:19,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266558034] [2021-07-13 19:24:19,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:19,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:19,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:19,325 INFO L87 Difference]: Start difference. First operand 21057 states and 54445 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:20,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:20,078 INFO L93 Difference]: Finished difference Result 23159 states and 58564 transitions. [2021-07-13 19:24:20,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:24:20,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:20,119 INFO L225 Difference]: With dead ends: 23159 [2021-07-13 19:24:20,119 INFO L226 Difference]: Without dead ends: 23147 [2021-07-13 19:24:20,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23147 states. [2021-07-13 19:24:20,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23147 to 21201. [2021-07-13 19:24:20,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21201 states, 21200 states have (on average 2.5853301886792455) internal successors, (54809), 21200 states have internal predecessors, (54809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21201 states to 21201 states and 54809 transitions. [2021-07-13 19:24:20,649 INFO L78 Accepts]: Start accepts. Automaton has 21201 states and 54809 transitions. Word has length 65 [2021-07-13 19:24:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:20,649 INFO L482 AbstractCegarLoop]: Abstraction has 21201 states and 54809 transitions. [2021-07-13 19:24:20,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 21201 states and 54809 transitions. [2021-07-13 19:24:20,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:20,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:20,670 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:20,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1389 [2021-07-13 19:24:20,888 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1428489097, now seen corresponding path program 197 times [2021-07-13 19:24:20,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:20,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472613190] [2021-07-13 19:24:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:20,963 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 146 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:20,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:20,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472613190] [2021-07-13 19:24:20,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472613190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:20,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018234974] [2021-07-13 19:24:20,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:21,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-13 19:24:21,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:21,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 147 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:21,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018234974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:21,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:21,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 21 [2021-07-13 19:24:21,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496132815] [2021-07-13 19:24:21,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:24:21,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:21,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:24:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:24:21,147 INFO L87 Difference]: Start difference. First operand 21201 states and 54809 transitions. Second operand has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:21,597 INFO L93 Difference]: Finished difference Result 25604 states and 63733 transitions. [2021-07-13 19:24:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:24:21,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:21,834 INFO L225 Difference]: With dead ends: 25604 [2021-07-13 19:24:21,834 INFO L226 Difference]: Without dead ends: 25574 [2021-07-13 19:24:21,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:24:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25574 states. [2021-07-13 19:24:22,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25574 to 21847. [2021-07-13 19:24:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21847 states, 21846 states have (on average 2.5884830174860385) internal successors, (56548), 21846 states have internal predecessors, (56548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21847 states to 21847 states and 56548 transitions. [2021-07-13 19:24:22,406 INFO L78 Accepts]: Start accepts. Automaton has 21847 states and 56548 transitions. Word has length 65 [2021-07-13 19:24:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:22,406 INFO L482 AbstractCegarLoop]: Abstraction has 21847 states and 56548 transitions. [2021-07-13 19:24:22,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.545454545454546) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:22,406 INFO L276 IsEmpty]: Start isEmpty. Operand 21847 states and 56548 transitions. [2021-07-13 19:24:22,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:22,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:22,426 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:22,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1390,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:22,642 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:22,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1375420183, now seen corresponding path program 400 times [2021-07-13 19:24:22,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:22,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538206558] [2021-07-13 19:24:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 68 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:22,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:22,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538206558] [2021-07-13 19:24:22,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538206558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:22,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381187108] [2021-07-13 19:24:22,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:22,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:22,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:22,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:22,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 68 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:22,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381187108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:22,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:22,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:24:22,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892850474] [2021-07-13 19:24:22,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:24:22,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:22,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:24:22,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:24:22,861 INFO L87 Difference]: Start difference. First operand 21847 states and 56548 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:23,154 INFO L93 Difference]: Finished difference Result 26845 states and 65318 transitions. [2021-07-13 19:24:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:24:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:23,214 INFO L225 Difference]: With dead ends: 26845 [2021-07-13 19:24:23,214 INFO L226 Difference]: Without dead ends: 26827 [2021-07-13 19:24:23,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:24:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-07-13 19:24:23,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 21826. [2021-07-13 19:24:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21826 states, 21825 states have (on average 2.586758304696449) internal successors, (56456), 21825 states have internal predecessors, (56456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21826 states to 21826 states and 56456 transitions. [2021-07-13 19:24:23,756 INFO L78 Accepts]: Start accepts. Automaton has 21826 states and 56456 transitions. Word has length 65 [2021-07-13 19:24:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:23,756 INFO L482 AbstractCegarLoop]: Abstraction has 21826 states and 56456 transitions. [2021-07-13 19:24:23,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 21826 states and 56456 transitions. [2021-07-13 19:24:23,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:23,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:23,774 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:23,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:23,975 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:23,975 INFO L82 PathProgramCache]: Analyzing trace with hash 870727724, now seen corresponding path program 401 times [2021-07-13 19:24:23,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:23,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698208338] [2021-07-13 19:24:23,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:24,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:24,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698208338] [2021-07-13 19:24:24,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698208338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:24,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590496315] [2021-07-13 19:24:24,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:24,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-13 19:24:24,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:24,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:24,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:24,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590496315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:24,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:24,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:24:24,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523699633] [2021-07-13 19:24:24,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:24:24,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:24,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:24:24,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:24:24,209 INFO L87 Difference]: Start difference. First operand 21826 states and 56456 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:25,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:25,189 INFO L93 Difference]: Finished difference Result 26191 states and 65578 transitions. [2021-07-13 19:24:25,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:24:25,189 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:25,237 INFO L225 Difference]: With dead ends: 26191 [2021-07-13 19:24:25,238 INFO L226 Difference]: Without dead ends: 26137 [2021-07-13 19:24:25,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:24:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26137 states. [2021-07-13 19:24:25,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26137 to 22289. [2021-07-13 19:24:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22289 states, 22288 states have (on average 2.589465183058148) internal successors, (57714), 22288 states have internal predecessors, (57714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57714 transitions. [2021-07-13 19:24:25,719 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57714 transitions. Word has length 65 [2021-07-13 19:24:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:25,719 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57714 transitions. [2021-07-13 19:24:25,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57714 transitions. [2021-07-13 19:24:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:25,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:25,739 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:25,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1396 [2021-07-13 19:24:25,939 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1891680463, now seen corresponding path program 402 times [2021-07-13 19:24:25,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:25,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314629879] [2021-07-13 19:24:25,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:26,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314629879] [2021-07-13 19:24:26,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314629879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216905745] [2021-07-13 19:24:26,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:26,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-13 19:24:26,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:26,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:26,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:26,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216905745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:26,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:26,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:24:26,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787233520] [2021-07-13 19:24:26,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:24:26,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:26,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:24:26,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:24:26,143 INFO L87 Difference]: Start difference. First operand 22289 states and 57714 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:26,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:26,402 INFO L93 Difference]: Finished difference Result 27384 states and 66666 transitions. [2021-07-13 19:24:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:24:26,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:26,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:26,456 INFO L225 Difference]: With dead ends: 27384 [2021-07-13 19:24:26,457 INFO L226 Difference]: Without dead ends: 27360 [2021-07-13 19:24:26,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27360 states. [2021-07-13 19:24:26,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27360 to 22289. [2021-07-13 19:24:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22289 states, 22288 states have (on average 2.588702440775305) internal successors, (57697), 22288 states have internal predecessors, (57697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57697 transitions. [2021-07-13 19:24:27,006 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57697 transitions. Word has length 65 [2021-07-13 19:24:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:27,006 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57697 transitions. [2021-07-13 19:24:27,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57697 transitions. [2021-07-13 19:24:27,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:27,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:27,026 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:27,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-07-13 19:24:27,226 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:27,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1025564258, now seen corresponding path program 403 times [2021-07-13 19:24:27,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:27,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274268456] [2021-07-13 19:24:27,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:27,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:27,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274268456] [2021-07-13 19:24:27,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274268456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:27,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699076111] [2021-07-13 19:24:27,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:27,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:27,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699076111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:27,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:27,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:24:27,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660724244] [2021-07-13 19:24:27,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:24:27,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:27,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:24:27,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:27,465 INFO L87 Difference]: Start difference. First operand 22289 states and 57697 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:29,057 INFO L93 Difference]: Finished difference Result 31771 states and 78106 transitions. [2021-07-13 19:24:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-13 19:24:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:29,119 INFO L225 Difference]: With dead ends: 31771 [2021-07-13 19:24:29,119 INFO L226 Difference]: Without dead ends: 31603 [2021-07-13 19:24:29,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=333, Invalid=3089, Unknown=0, NotChecked=0, Total=3422 [2021-07-13 19:24:29,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31603 states. [2021-07-13 19:24:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31603 to 23236. [2021-07-13 19:24:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23236 states, 23235 states have (on average 2.5904884871960405) internal successors, (60190), 23235 states have internal predecessors, (60190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60190 transitions. [2021-07-13 19:24:29,616 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60190 transitions. Word has length 65 [2021-07-13 19:24:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:29,616 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60190 transitions. [2021-07-13 19:24:29,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60190 transitions. [2021-07-13 19:24:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:29,636 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:29,636 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:29,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1401 [2021-07-13 19:24:29,836 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:29,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1412166935, now seen corresponding path program 404 times [2021-07-13 19:24:29,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:29,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233450708] [2021-07-13 19:24:29,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:29,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:29,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233450708] [2021-07-13 19:24:29,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233450708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:29,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091279028] [2021-07-13 19:24:29,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:29,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:29,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:29,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:29,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:30,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091279028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:30,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:30,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-13 19:24:30,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721724193] [2021-07-13 19:24:30,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:24:30,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:30,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:24:30,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:30,136 INFO L87 Difference]: Start difference. First operand 23236 states and 60190 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:30,412 INFO L93 Difference]: Finished difference Result 28515 states and 69490 transitions. [2021-07-13 19:24:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:24:30,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:30,466 INFO L225 Difference]: With dead ends: 28515 [2021-07-13 19:24:30,466 INFO L226 Difference]: Without dead ends: 28482 [2021-07-13 19:24:30,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28482 states. [2021-07-13 19:24:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28482 to 23236. [2021-07-13 19:24:30,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23236 states, 23235 states have (on average 2.590101140520766) internal successors, (60181), 23235 states have internal predecessors, (60181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60181 transitions. [2021-07-13 19:24:31,051 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60181 transitions. Word has length 65 [2021-07-13 19:24:31,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:31,051 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60181 transitions. [2021-07-13 19:24:31,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:31,051 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60181 transitions. [2021-07-13 19:24:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:31,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:31,074 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:31,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1402 [2021-07-13 19:24:31,274 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:31,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:31,274 INFO L82 PathProgramCache]: Analyzing trace with hash 965872748, now seen corresponding path program 405 times [2021-07-13 19:24:31,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:31,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605165492] [2021-07-13 19:24:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:31,409 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:31,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:31,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605165492] [2021-07-13 19:24:31,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605165492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:31,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483743928] [2021-07-13 19:24:31,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:31,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-07-13 19:24:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:31,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483743928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:31,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:31,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-13 19:24:31,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951545954] [2021-07-13 19:24:31,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:24:31,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:31,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:24:31,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:24:31,550 INFO L87 Difference]: Start difference. First operand 23236 states and 60181 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:33,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:33,827 INFO L93 Difference]: Finished difference Result 43429 states and 104578 transitions. [2021-07-13 19:24:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-07-13 19:24:33,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:33,920 INFO L225 Difference]: With dead ends: 43429 [2021-07-13 19:24:33,920 INFO L226 Difference]: Without dead ends: 42973 [2021-07-13 19:24:33,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 1185.6ms TimeCoverageRelationStatistics Valid=819, Invalid=8883, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 19:24:33,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42973 states. [2021-07-13 19:24:34,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42973 to 24902. [2021-07-13 19:24:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24902 states, 24901 states have (on average 2.590699168708084) internal successors, (64511), 24901 states have internal predecessors, (64511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64511 transitions. [2021-07-13 19:24:34,569 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64511 transitions. Word has length 65 [2021-07-13 19:24:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:34,569 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64511 transitions. [2021-07-13 19:24:34,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64511 transitions. [2021-07-13 19:24:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:34,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:34,588 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:34,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:34,789 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:34,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1435521679, now seen corresponding path program 406 times [2021-07-13 19:24:34,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:34,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112517034] [2021-07-13 19:24:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 53 proven. 173 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:34,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:34,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112517034] [2021-07-13 19:24:34,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112517034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:34,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321790726] [2021-07-13 19:24:34,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:34,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:24:34,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:34,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:34,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:35,002 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 53 proven. 173 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:35,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321790726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:35,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:35,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:24:35,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353249126] [2021-07-13 19:24:35,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:24:35,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:35,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:24:35,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:24:35,003 INFO L87 Difference]: Start difference. First operand 24902 states and 64511 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:35,335 INFO L93 Difference]: Finished difference Result 30490 states and 74400 transitions. [2021-07-13 19:24:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:24:35,335 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:35,401 INFO L225 Difference]: With dead ends: 30490 [2021-07-13 19:24:35,401 INFO L226 Difference]: Without dead ends: 30448 [2021-07-13 19:24:35,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30448 states. [2021-07-13 19:24:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30448 to 24902. [2021-07-13 19:24:35,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24902 states, 24901 states have (on average 2.5903377374402634) internal successors, (64502), 24901 states have internal predecessors, (64502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64502 transitions. [2021-07-13 19:24:35,997 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64502 transitions. Word has length 65 [2021-07-13 19:24:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:35,997 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64502 transitions. [2021-07-13 19:24:35,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:35,997 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64502 transitions. [2021-07-13 19:24:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:36,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:36,017 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:36,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:36,218 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:36,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:36,218 INFO L82 PathProgramCache]: Analyzing trace with hash 812558882, now seen corresponding path program 407 times [2021-07-13 19:24:36,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:36,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040922342] [2021-07-13 19:24:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:36,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:36,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040922342] [2021-07-13 19:24:36,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040922342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:36,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927504069] [2021-07-13 19:24:36,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:36,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-07-13 19:24:36,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:36,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:36,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:36,485 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:36,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927504069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:36,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:36,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:24:36,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877147768] [2021-07-13 19:24:36,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:36,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:36,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:36,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:36,486 INFO L87 Difference]: Start difference. First operand 24902 states and 64502 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:40,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:40,128 INFO L93 Difference]: Finished difference Result 69310 states and 163134 transitions. [2021-07-13 19:24:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-07-13 19:24:40,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:40,279 INFO L225 Difference]: With dead ends: 69310 [2021-07-13 19:24:40,279 INFO L226 Difference]: Without dead ends: 67924 [2021-07-13 19:24:40,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10744 ImplicationChecksByTransitivity, 2352.9ms TimeCoverageRelationStatistics Valid=1953, Invalid=24453, Unknown=0, NotChecked=0, Total=26406 [2021-07-13 19:24:40,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67924 states. [2021-07-13 19:24:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67924 to 27517. [2021-07-13 19:24:41,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27517 states, 27516 states have (on average 2.5895842418956243) internal successors, (71255), 27516 states have internal predecessors, (71255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71255 transitions. [2021-07-13 19:24:41,347 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71255 transitions. Word has length 65 [2021-07-13 19:24:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:41,347 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71255 transitions. [2021-07-13 19:24:41,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71255 transitions. [2021-07-13 19:24:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:41,369 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:41,369 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:41,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:41,585 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:41,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:41,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1561976535, now seen corresponding path program 408 times [2021-07-13 19:24:41,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:41,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22959826] [2021-07-13 19:24:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:41,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:41,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:41,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22959826] [2021-07-13 19:24:41,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22959826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:41,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702261372] [2021-07-13 19:24:41,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:41,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-13 19:24:41,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:41,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:41,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702261372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:41,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:41,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-13 19:24:41,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400445258] [2021-07-13 19:24:41,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:24:41,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:41,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:24:41,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:24:41,831 INFO L87 Difference]: Start difference. First operand 27517 states and 71255 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:42,478 INFO L93 Difference]: Finished difference Result 33599 states and 82086 transitions. [2021-07-13 19:24:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:24:42,478 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:42,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:42,534 INFO L225 Difference]: With dead ends: 33599 [2021-07-13 19:24:42,534 INFO L226 Difference]: Without dead ends: 33548 [2021-07-13 19:24:42,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:24:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33548 states. [2021-07-13 19:24:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33548 to 27517. [2021-07-13 19:24:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27517 states, 27516 states have (on average 2.5892571594708533) internal successors, (71246), 27516 states have internal predecessors, (71246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71246 transitions. [2021-07-13 19:24:43,621 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71246 transitions. Word has length 65 [2021-07-13 19:24:43,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:43,621 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71246 transitions. [2021-07-13 19:24:43,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71246 transitions. [2021-07-13 19:24:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:43,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:43,842 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:44,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-07-13 19:24:44,057 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:44,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:44,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1010587476, now seen corresponding path program 409 times [2021-07-13 19:24:44,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:44,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896229996] [2021-07-13 19:24:44,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:44,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:44,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896229996] [2021-07-13 19:24:44,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896229996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:44,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074991784] [2021-07-13 19:24:44,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:44,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:44,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:24:44,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074991784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:44,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:44,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-13 19:24:44,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424369499] [2021-07-13 19:24:44,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:44,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:44,339 INFO L87 Difference]: Start difference. First operand 27517 states and 71246 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:50,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:50,117 INFO L93 Difference]: Finished difference Result 88601 states and 209190 transitions. [2021-07-13 19:24:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2021-07-13 19:24:50,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:50,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:50,331 INFO L225 Difference]: With dead ends: 88601 [2021-07-13 19:24:50,331 INFO L226 Difference]: Without dead ends: 87281 [2021-07-13 19:24:50,334 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29314 ImplicationChecksByTransitivity, 4364.8ms TimeCoverageRelationStatistics Valid=4383, Invalid=62439, Unknown=0, NotChecked=0, Total=66822 [2021-07-13 19:24:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87281 states. [2021-07-13 19:24:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87281 to 29787. [2021-07-13 19:24:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29787 states, 29786 states have (on average 2.5864164372524003) internal successors, (77039), 29786 states have internal predecessors, (77039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29787 states to 29787 states and 77039 transitions. [2021-07-13 19:24:51,634 INFO L78 Accepts]: Start accepts. Automaton has 29787 states and 77039 transitions. Word has length 65 [2021-07-13 19:24:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:51,634 INFO L482 AbstractCegarLoop]: Abstraction has 29787 states and 77039 transitions. [2021-07-13 19:24:51,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 29787 states and 77039 transitions. [2021-07-13 19:24:51,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:51,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:51,657 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:51,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-07-13 19:24:51,858 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:51,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:51,858 INFO L82 PathProgramCache]: Analyzing trace with hash -928748623, now seen corresponding path program 410 times [2021-07-13 19:24:51,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:51,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546972277] [2021-07-13 19:24:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 67 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:51,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:51,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546972277] [2021-07-13 19:24:51,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546972277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:51,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540990114] [2021-07-13 19:24:51,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:52,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:52,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:52,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:52,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 67 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:52,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540990114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:52,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:52,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-13 19:24:52,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906866377] [2021-07-13 19:24:52,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:24:52,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:52,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:24:52,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:24:52,102 INFO L87 Difference]: Start difference. First operand 29787 states and 77039 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:52,663 INFO L93 Difference]: Finished difference Result 36048 states and 88237 transitions. [2021-07-13 19:24:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:24:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:52,735 INFO L225 Difference]: With dead ends: 36048 [2021-07-13 19:24:52,735 INFO L226 Difference]: Without dead ends: 35988 [2021-07-13 19:24:52,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 184.5ms TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:24:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35988 states. [2021-07-13 19:24:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35988 to 29354. [2021-07-13 19:24:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29354 states, 29353 states have (on average 2.583756345177665) internal successors, (75841), 29353 states have internal predecessors, (75841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29354 states to 29354 states and 75841 transitions. [2021-07-13 19:24:53,545 INFO L78 Accepts]: Start accepts. Automaton has 29354 states and 75841 transitions. Word has length 65 [2021-07-13 19:24:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:53,546 INFO L482 AbstractCegarLoop]: Abstraction has 29354 states and 75841 transitions. [2021-07-13 19:24:53,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:53,546 INFO L276 IsEmpty]: Start isEmpty. Operand 29354 states and 75841 transitions. [2021-07-13 19:24:53,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:53,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:53,567 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:53,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-07-13 19:24:53,768 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:53,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:53,768 INFO L82 PathProgramCache]: Analyzing trace with hash -207313438, now seen corresponding path program 411 times [2021-07-13 19:24:53,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:53,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614738797] [2021-07-13 19:24:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:53,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:53,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614738797] [2021-07-13 19:24:53,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614738797] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:53,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298988343] [2021-07-13 19:24:53,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:53,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-07-13 19:24:53,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:53,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:24:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:54,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298988343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:54,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:54,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-07-13 19:24:54,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792031655] [2021-07-13 19:24:54,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:24:54,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:54,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:24:54,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:24:54,048 INFO L87 Difference]: Start difference. First operand 29354 states and 75841 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:55,260 INFO L93 Difference]: Finished difference Result 42805 states and 102748 transitions. [2021-07-13 19:24:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:24:55,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:55,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:55,329 INFO L225 Difference]: With dead ends: 42805 [2021-07-13 19:24:55,329 INFO L226 Difference]: Without dead ends: 41023 [2021-07-13 19:24:55,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:24:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41023 states. [2021-07-13 19:24:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41023 to 21413. [2021-07-13 19:24:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21413 states, 21412 states have (on average 2.5783205679058474) internal successors, (55207), 21412 states have internal predecessors, (55207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55207 transitions. [2021-07-13 19:24:55,868 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55207 transitions. Word has length 65 [2021-07-13 19:24:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:55,868 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55207 transitions. [2021-07-13 19:24:55,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:55,868 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55207 transitions. [2021-07-13 19:24:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:55,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:55,889 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:56,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-07-13 19:24:56,090 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1067255365, now seen corresponding path program 198 times [2021-07-13 19:24:56,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:56,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568133336] [2021-07-13 19:24:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 170 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:56,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:56,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568133336] [2021-07-13 19:24:56,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568133336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:56,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348332073] [2021-07-13 19:24:56,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:56,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-13 19:24:56,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:56,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:56,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 171 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:56,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348332073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:56,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:56,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-13 19:24:56,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687593361] [2021-07-13 19:24:56,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:24:56,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:56,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:24:56,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:24:56,294 INFO L87 Difference]: Start difference. First operand 21413 states and 55207 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:56,737 INFO L93 Difference]: Finished difference Result 31342 states and 77017 transitions. [2021-07-13 19:24:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:24:56,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:56,793 INFO L225 Difference]: With dead ends: 31342 [2021-07-13 19:24:56,793 INFO L226 Difference]: Without dead ends: 31342 [2021-07-13 19:24:56,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:24:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31342 states. [2021-07-13 19:24:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31342 to 21689. [2021-07-13 19:24:57,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21689 states, 21688 states have (on average 2.58382515676872) internal successors, (56038), 21688 states have internal predecessors, (56038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21689 states to 21689 states and 56038 transitions. [2021-07-13 19:24:57,392 INFO L78 Accepts]: Start accepts. Automaton has 21689 states and 56038 transitions. Word has length 65 [2021-07-13 19:24:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:57,392 INFO L482 AbstractCegarLoop]: Abstraction has 21689 states and 56038 transitions. [2021-07-13 19:24:57,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 21689 states and 56038 transitions. [2021-07-13 19:24:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:57,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:57,409 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:57,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1432 [2021-07-13 19:24:57,610 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:57,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1590139475, now seen corresponding path program 199 times [2021-07-13 19:24:57,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:57,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603005400] [2021-07-13 19:24:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 169 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:57,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:57,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603005400] [2021-07-13 19:24:57,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603005400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:57,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672742490] [2021-07-13 19:24:57,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:57,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:57,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 170 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:57,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672742490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:57,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:57,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-13 19:24:57,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772185941] [2021-07-13 19:24:57,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:24:57,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:57,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:24:57,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:24:57,835 INFO L87 Difference]: Start difference. First operand 21689 states and 56038 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:58,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:58,301 INFO L93 Difference]: Finished difference Result 35356 states and 86322 transitions. [2021-07-13 19:24:58,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:24:58,302 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:24:58,367 INFO L225 Difference]: With dead ends: 35356 [2021-07-13 19:24:58,367 INFO L226 Difference]: Without dead ends: 35356 [2021-07-13 19:24:58,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=296, Invalid=460, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:24:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35356 states. [2021-07-13 19:24:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35356 to 21737. [2021-07-13 19:24:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21737 states, 21736 states have (on average 2.584606183290394) internal successors, (56179), 21736 states have internal predecessors, (56179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21737 states to 21737 states and 56179 transitions. [2021-07-13 19:24:58,896 INFO L78 Accepts]: Start accepts. Automaton has 21737 states and 56179 transitions. Word has length 65 [2021-07-13 19:24:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:24:58,896 INFO L482 AbstractCegarLoop]: Abstraction has 21737 states and 56179 transitions. [2021-07-13 19:24:58,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:58,896 INFO L276 IsEmpty]: Start isEmpty. Operand 21737 states and 56179 transitions. [2021-07-13 19:24:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:24:58,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:24:58,917 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:24:59,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1433,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:59,118 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:24:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:24:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash -99855689, now seen corresponding path program 200 times [2021-07-13 19:24:59,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:24:59,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304702758] [2021-07-13 19:24:59,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:24:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:24:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 162 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:24:59,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:24:59,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304702758] [2021-07-13 19:24:59,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304702758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:59,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974997478] [2021-07-13 19:24:59,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:24:59,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:24:59,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:24:59,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:24:59,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:24:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:24:59,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974997478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:24:59,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:24:59,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-13 19:24:59,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802906773] [2021-07-13 19:24:59,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:24:59,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:24:59,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:24:59,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:24:59,337 INFO L87 Difference]: Start difference. First operand 21737 states and 56179 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:24:59,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:24:59,943 INFO L93 Difference]: Finished difference Result 37231 states and 90722 transitions. [2021-07-13 19:24:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:24:59,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:24:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:00,013 INFO L225 Difference]: With dead ends: 37231 [2021-07-13 19:25:00,013 INFO L226 Difference]: Without dead ends: 37231 [2021-07-13 19:25:00,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=403, Invalid=653, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:25:00,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37231 states. [2021-07-13 19:25:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37231 to 21806. [2021-07-13 19:25:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21806 states, 21805 states have (on average 2.5857830772758543) internal successors, (56383), 21805 states have internal predecessors, (56383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:00,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21806 states to 21806 states and 56383 transitions. [2021-07-13 19:25:00,614 INFO L78 Accepts]: Start accepts. Automaton has 21806 states and 56383 transitions. Word has length 65 [2021-07-13 19:25:00,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:00,614 INFO L482 AbstractCegarLoop]: Abstraction has 21806 states and 56383 transitions. [2021-07-13 19:25:00,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:00,614 INFO L276 IsEmpty]: Start isEmpty. Operand 21806 states and 56383 transitions. [2021-07-13 19:25:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:00,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:00,635 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:00,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1434 [2021-07-13 19:25:00,836 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:00,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1139142701, now seen corresponding path program 201 times [2021-07-13 19:25:00,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:00,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726663631] [2021-07-13 19:25:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 155 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:00,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:00,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726663631] [2021-07-13 19:25:00,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726663631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:00,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191359107] [2021-07-13 19:25:00,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:00,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-07-13 19:25:00,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:00,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:00,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:01,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191359107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:01,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:01,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-07-13 19:25:01,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445151226] [2021-07-13 19:25:01,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:25:01,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:01,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:25:01,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:25:01,075 INFO L87 Difference]: Start difference. First operand 21806 states and 56383 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:01,703 INFO L93 Difference]: Finished difference Result 37033 states and 90316 transitions. [2021-07-13 19:25:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:25:01,704 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:01,780 INFO L225 Difference]: With dead ends: 37033 [2021-07-13 19:25:01,781 INFO L226 Difference]: Without dead ends: 37033 [2021-07-13 19:25:01,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:25:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37033 states. [2021-07-13 19:25:02,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37033 to 21884. [2021-07-13 19:25:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21884 states, 21883 states have (on average 2.5871224237992965) internal successors, (56614), 21883 states have internal predecessors, (56614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21884 states to 21884 states and 56614 transitions. [2021-07-13 19:25:02,454 INFO L78 Accepts]: Start accepts. Automaton has 21884 states and 56614 transitions. Word has length 65 [2021-07-13 19:25:02,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:02,454 INFO L482 AbstractCegarLoop]: Abstraction has 21884 states and 56614 transitions. [2021-07-13 19:25:02,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:02,454 INFO L276 IsEmpty]: Start isEmpty. Operand 21884 states and 56614 transitions. [2021-07-13 19:25:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:02,474 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:02,474 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:02,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:02,674 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash -119280329, now seen corresponding path program 202 times [2021-07-13 19:25:02,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:02,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207022711] [2021-07-13 19:25:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 148 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:02,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:02,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207022711] [2021-07-13 19:25:02,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207022711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:02,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510954516] [2021-07-13 19:25:02,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:02,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:02,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:02,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 149 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:02,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510954516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:02,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:02,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-07-13 19:25:02,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776076270] [2021-07-13 19:25:02,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:25:02,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:02,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:25:02,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:25:02,919 INFO L87 Difference]: Start difference. First operand 21884 states and 56614 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:03,762 INFO L93 Difference]: Finished difference Result 34831 states and 85232 transitions. [2021-07-13 19:25:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:25:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:03,839 INFO L225 Difference]: With dead ends: 34831 [2021-07-13 19:25:03,840 INFO L226 Difference]: Without dead ends: 34831 [2021-07-13 19:25:03,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=503, Invalid=829, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:25:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34831 states. [2021-07-13 19:25:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34831 to 21919. [2021-07-13 19:25:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21919 states, 21918 states have (on average 2.5879186057122) internal successors, (56722), 21918 states have internal predecessors, (56722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 56722 transitions. [2021-07-13 19:25:04,406 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 56722 transitions. Word has length 65 [2021-07-13 19:25:04,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:04,407 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 56722 transitions. [2021-07-13 19:25:04,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 56722 transitions. [2021-07-13 19:25:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:04,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:04,426 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:04,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1436 [2021-07-13 19:25:04,626 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:04,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:04,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1992019, now seen corresponding path program 203 times [2021-07-13 19:25:04,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:04,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502607086] [2021-07-13 19:25:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 141 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:04,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:04,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502607086] [2021-07-13 19:25:04,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502607086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:04,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147795028] [2021-07-13 19:25:04,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:04,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-07-13 19:25:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:04,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 142 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:05,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147795028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:05,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:05,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 36 [2021-07-13 19:25:05,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616129621] [2021-07-13 19:25:05,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:25:05,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:05,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:25:05,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:25:05,119 INFO L87 Difference]: Start difference. First operand 21919 states and 56722 transitions. Second operand has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:06,368 INFO L93 Difference]: Finished difference Result 31459 states and 77242 transitions. [2021-07-13 19:25:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:25:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:06,431 INFO L225 Difference]: With dead ends: 31459 [2021-07-13 19:25:06,431 INFO L226 Difference]: Without dead ends: 31459 [2021-07-13 19:25:06,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 648.0ms TimeCoverageRelationStatistics Valid=1021, Invalid=2285, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:25:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31459 states. [2021-07-13 19:25:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31459 to 21939. [2021-07-13 19:25:06,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21939 states, 21938 states have (on average 2.5886133649375513) internal successors, (56789), 21938 states have internal predecessors, (56789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21939 states to 21939 states and 56789 transitions. [2021-07-13 19:25:06,893 INFO L78 Accepts]: Start accepts. Automaton has 21939 states and 56789 transitions. Word has length 65 [2021-07-13 19:25:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:06,893 INFO L482 AbstractCegarLoop]: Abstraction has 21939 states and 56789 transitions. [2021-07-13 19:25:06,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 3.2162162162162162) internal successors, (119), 36 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 21939 states and 56789 transitions. [2021-07-13 19:25:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:06,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:06,915 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:07,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1437,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:07,115 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:07,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:07,116 INFO L82 PathProgramCache]: Analyzing trace with hash 759015351, now seen corresponding path program 204 times [2021-07-13 19:25:07,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:07,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504951543] [2021-07-13 19:25:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 134 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:07,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:07,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504951543] [2021-07-13 19:25:07,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504951543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:07,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105998101] [2021-07-13 19:25:07,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:07,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-07-13 19:25:07,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:07,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:07,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:07,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105998101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:07,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:07,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 19 [2021-07-13 19:25:07,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192432599] [2021-07-13 19:25:07,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:25:07,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:07,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:25:07,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:25:07,502 INFO L87 Difference]: Start difference. First operand 21939 states and 56789 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:08,093 INFO L93 Difference]: Finished difference Result 26303 states and 65783 transitions. [2021-07-13 19:25:08,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:25:08,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:08,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:08,149 INFO L225 Difference]: With dead ends: 26303 [2021-07-13 19:25:08,149 INFO L226 Difference]: Without dead ends: 26303 [2021-07-13 19:25:08,149 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=371, Invalid=685, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:25:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26303 states. [2021-07-13 19:25:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26303 to 21121. [2021-07-13 19:25:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 21120 states have (on average 2.5846117424242423) internal successors, (54587), 21120 states have internal predecessors, (54587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54587 transitions. [2021-07-13 19:25:08,724 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54587 transitions. Word has length 65 [2021-07-13 19:25:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:08,725 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54587 transitions. [2021-07-13 19:25:08,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54587 transitions. [2021-07-13 19:25:08,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:08,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:08,745 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:08,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-07-13 19:25:08,946 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:08,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2028042391, now seen corresponding path program 412 times [2021-07-13 19:25:08,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:08,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833078499] [2021-07-13 19:25:08,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:08,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 84 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:09,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833078499] [2021-07-13 19:25:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833078499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:09,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451827052] [2021-07-13 19:25:09,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:09,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:09,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:09,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:09,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 84 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:09,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451827052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:09,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:09,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-13 19:25:09,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408777091] [2021-07-13 19:25:09,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:09,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:09,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:09,217 INFO L87 Difference]: Start difference. First operand 21121 states and 54587 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:09,616 INFO L93 Difference]: Finished difference Result 25725 states and 62650 transitions. [2021-07-13 19:25:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:09,616 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:09,666 INFO L225 Difference]: With dead ends: 25725 [2021-07-13 19:25:09,666 INFO L226 Difference]: Without dead ends: 25662 [2021-07-13 19:25:09,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:25:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25662 states. [2021-07-13 19:25:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25662 to 21121. [2021-07-13 19:25:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21121 states, 21120 states have (on average 2.584185606060606) internal successors, (54578), 21120 states have internal predecessors, (54578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54578 transitions. [2021-07-13 19:25:10,225 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54578 transitions. Word has length 65 [2021-07-13 19:25:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:10,225 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54578 transitions. [2021-07-13 19:25:10,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:10,225 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54578 transitions. [2021-07-13 19:25:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:10,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:10,244 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:10,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1439,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:10,445 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:10,445 INFO L82 PathProgramCache]: Analyzing trace with hash 407999270, now seen corresponding path program 205 times [2021-07-13 19:25:10,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:10,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497329634] [2021-07-13 19:25:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:10,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:10,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497329634] [2021-07-13 19:25:10,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497329634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:10,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136397361] [2021-07-13 19:25:10,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:10,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:25:10,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:10,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136397361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:10,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:10,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:25:10,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154632644] [2021-07-13 19:25:10,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:25:10,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:10,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:25:10,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:10,682 INFO L87 Difference]: Start difference. First operand 21121 states and 54578 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:11,418 INFO L93 Difference]: Finished difference Result 23217 states and 58673 transitions. [2021-07-13 19:25:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:11,459 INFO L225 Difference]: With dead ends: 23217 [2021-07-13 19:25:11,459 INFO L226 Difference]: Without dead ends: 23202 [2021-07-13 19:25:11,459 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:11,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23202 states. [2021-07-13 19:25:11,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23202 to 21457. [2021-07-13 19:25:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21457 states, 21456 states have (on average 2.580723340790455) internal successors, (55372), 21456 states have internal predecessors, (55372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:11,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21457 states to 21457 states and 55372 transitions. [2021-07-13 19:25:11,933 INFO L78 Accepts]: Start accepts. Automaton has 21457 states and 55372 transitions. Word has length 65 [2021-07-13 19:25:11,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:11,933 INFO L482 AbstractCegarLoop]: Abstraction has 21457 states and 55372 transitions. [2021-07-13 19:25:11,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:11,933 INFO L276 IsEmpty]: Start isEmpty. Operand 21457 states and 55372 transitions. [2021-07-13 19:25:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:11,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:11,952 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:12,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1448,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:12,153 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1908332262, now seen corresponding path program 413 times [2021-07-13 19:25:12,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:12,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977439984] [2021-07-13 19:25:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:12,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:12,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977439984] [2021-07-13 19:25:12,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977439984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:12,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111876300] [2021-07-13 19:25:12,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:12,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:25:12,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:12,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:25:12,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:12,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111876300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:12,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:12,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-13 19:25:12,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279848305] [2021-07-13 19:25:12,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:25:12,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:12,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:25:12,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:12,416 INFO L87 Difference]: Start difference. First operand 21457 states and 55372 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:13,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:13,317 INFO L93 Difference]: Finished difference Result 22759 states and 57640 transitions. [2021-07-13 19:25:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:13,318 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:13,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:13,367 INFO L225 Difference]: With dead ends: 22759 [2021-07-13 19:25:13,368 INFO L226 Difference]: Without dead ends: 22613 [2021-07-13 19:25:13,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:13,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22613 states. [2021-07-13 19:25:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22613 to 21545. [2021-07-13 19:25:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21545 states, 21544 states have (on average 2.5720850352766433) internal successors, (55413), 21544 states have internal predecessors, (55413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21545 states to 21545 states and 55413 transitions. [2021-07-13 19:25:13,845 INFO L78 Accepts]: Start accepts. Automaton has 21545 states and 55413 transitions. Word has length 65 [2021-07-13 19:25:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:13,845 INFO L482 AbstractCegarLoop]: Abstraction has 21545 states and 55413 transitions. [2021-07-13 19:25:13,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 21545 states and 55413 transitions. [2021-07-13 19:25:13,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:13,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:13,864 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:14,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1449 [2021-07-13 19:25:14,065 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:14,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1294796082, now seen corresponding path program 414 times [2021-07-13 19:25:14,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:14,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650028922] [2021-07-13 19:25:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:25:14,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:14,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650028922] [2021-07-13 19:25:14,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650028922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:14,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374482553] [2021-07-13 19:25:14,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:14,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-13 19:25:14,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:14,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:25:14,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:25:14,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374482553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:14,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:14,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-13 19:25:14,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815579111] [2021-07-13 19:25:14,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:25:14,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:14,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:25:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:14,308 INFO L87 Difference]: Start difference. First operand 21545 states and 55413 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:15,032 INFO L93 Difference]: Finished difference Result 23561 states and 59381 transitions. [2021-07-13 19:25:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:15,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:15,075 INFO L225 Difference]: With dead ends: 23561 [2021-07-13 19:25:15,076 INFO L226 Difference]: Without dead ends: 23549 [2021-07-13 19:25:15,076 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23549 states. [2021-07-13 19:25:15,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23549 to 21713. [2021-07-13 19:25:15,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21713 states, 21712 states have (on average 2.5719878408253503) internal successors, (55843), 21712 states have internal predecessors, (55843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 55843 transitions. [2021-07-13 19:25:15,538 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 55843 transitions. Word has length 65 [2021-07-13 19:25:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:15,538 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 55843 transitions. [2021-07-13 19:25:15,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:15,538 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 55843 transitions. [2021-07-13 19:25:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:15,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:15,558 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:15,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:15,771 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:15,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:15,771 INFO L82 PathProgramCache]: Analyzing trace with hash -353561421, now seen corresponding path program 415 times [2021-07-13 19:25:15,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:15,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490229136] [2021-07-13 19:25:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:15,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:15,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:15,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490229136] [2021-07-13 19:25:15,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490229136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:15,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774944782] [2021-07-13 19:25:15,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:15,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:15,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:15,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774944782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:15,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:15,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-13 19:25:15,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109222338] [2021-07-13 19:25:15,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:25:15,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:15,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:25:15,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:15,971 INFO L87 Difference]: Start difference. First operand 21713 states and 55843 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:16,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:16,227 INFO L93 Difference]: Finished difference Result 26875 states and 64939 transitions. [2021-07-13 19:25:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:25:16,228 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:16,279 INFO L225 Difference]: With dead ends: 26875 [2021-07-13 19:25:16,279 INFO L226 Difference]: Without dead ends: 26857 [2021-07-13 19:25:16,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:25:16,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26857 states. [2021-07-13 19:25:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26857 to 21701. [2021-07-13 19:25:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21701 states, 21700 states have (on average 2.5707834101382487) internal successors, (55786), 21700 states have internal predecessors, (55786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21701 states to 21701 states and 55786 transitions. [2021-07-13 19:25:16,770 INFO L78 Accepts]: Start accepts. Automaton has 21701 states and 55786 transitions. Word has length 65 [2021-07-13 19:25:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:16,770 INFO L482 AbstractCegarLoop]: Abstraction has 21701 states and 55786 transitions. [2021-07-13 19:25:16,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 21701 states and 55786 transitions. [2021-07-13 19:25:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:16,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:16,791 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:16,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1451,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:16,991 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:16,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:16,991 INFO L82 PathProgramCache]: Analyzing trace with hash -858253880, now seen corresponding path program 416 times [2021-07-13 19:25:16,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:16,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105253541] [2021-07-13 19:25:16,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:17,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:17,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105253541] [2021-07-13 19:25:17,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105253541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:17,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174304636] [2021-07-13 19:25:17,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:17,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:17,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:17,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:25:17,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:17,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174304636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:17,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:17,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-13 19:25:17,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585818416] [2021-07-13 19:25:17,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:25:17,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:17,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:25:17,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:25:17,218 INFO L87 Difference]: Start difference. First operand 21701 states and 55786 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:18,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:18,264 INFO L93 Difference]: Finished difference Result 26110 states and 65034 transitions. [2021-07-13 19:25:18,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:25:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:18,315 INFO L225 Difference]: With dead ends: 26110 [2021-07-13 19:25:18,315 INFO L226 Difference]: Without dead ends: 26056 [2021-07-13 19:25:18,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:25:18,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26056 states. [2021-07-13 19:25:18,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26056 to 22216. [2021-07-13 19:25:18,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22216 states, 22215 states have (on average 2.574476704929102) internal successors, (57192), 22215 states have internal predecessors, (57192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57192 transitions. [2021-07-13 19:25:18,808 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57192 transitions. Word has length 65 [2021-07-13 19:25:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:18,808 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57192 transitions. [2021-07-13 19:25:18,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57192 transitions. [2021-07-13 19:25:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:18,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:18,828 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:19,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1454 [2021-07-13 19:25:19,044 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash 674305229, now seen corresponding path program 417 times [2021-07-13 19:25:19,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:19,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437989523] [2021-07-13 19:25:19,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 73 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:19,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:19,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437989523] [2021-07-13 19:25:19,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437989523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:19,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375952553] [2021-07-13 19:25:19,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:19,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-13 19:25:19,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:19,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:19,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 73 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:19,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375952553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:19,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:19,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-13 19:25:19,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399900699] [2021-07-13 19:25:19,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:25:19,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:19,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:25:19,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:25:19,268 INFO L87 Difference]: Start difference. First operand 22216 states and 57192 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:19,550 INFO L93 Difference]: Finished difference Result 27492 states and 66503 transitions. [2021-07-13 19:25:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:25:19,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:19,603 INFO L225 Difference]: With dead ends: 27492 [2021-07-13 19:25:19,603 INFO L226 Difference]: Without dead ends: 27468 [2021-07-13 19:25:19,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:25:19,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27468 states. [2021-07-13 19:25:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27468 to 22216. [2021-07-13 19:25:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22216 states, 22215 states have (on average 2.573666441593518) internal successors, (57174), 22215 states have internal predecessors, (57174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57174 transitions. [2021-07-13 19:25:20,178 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57174 transitions. Word has length 65 [2021-07-13 19:25:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:20,178 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57174 transitions. [2021-07-13 19:25:20,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:20,178 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57174 transitions. [2021-07-13 19:25:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:20,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:20,197 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:20,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1455,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:20,398 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:20,398 INFO L82 PathProgramCache]: Analyzing trace with hash -703417346, now seen corresponding path program 418 times [2021-07-13 19:25:20,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:20,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278627483] [2021-07-13 19:25:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:20,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:20,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278627483] [2021-07-13 19:25:20,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278627483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:20,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66395027] [2021-07-13 19:25:20,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:20,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:20,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:20,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:25:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:20,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66395027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:20,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:20,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-13 19:25:20,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351132036] [2021-07-13 19:25:20,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:25:20,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:20,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:25:20,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:25:20,668 INFO L87 Difference]: Start difference. First operand 22216 states and 57174 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:22,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:22,273 INFO L93 Difference]: Finished difference Result 31885 states and 78097 transitions. [2021-07-13 19:25:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:25:22,274 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:22,337 INFO L225 Difference]: With dead ends: 31885 [2021-07-13 19:25:22,337 INFO L226 Difference]: Without dead ends: 31717 [2021-07-13 19:25:22,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 653.5ms TimeCoverageRelationStatistics Valid=381, Invalid=3779, Unknown=0, NotChecked=0, Total=4160 [2021-07-13 19:25:22,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31717 states. [2021-07-13 19:25:22,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31717 to 23319. [2021-07-13 19:25:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23319 states, 23318 states have (on average 2.576636075135089) internal successors, (60082), 23318 states have internal predecessors, (60082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:22,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60082 transitions. [2021-07-13 19:25:22,976 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60082 transitions. Word has length 65 [2021-07-13 19:25:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:22,977 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60082 transitions. [2021-07-13 19:25:22,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:22,977 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60082 transitions. [2021-07-13 19:25:22,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:22,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:22,998 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:23,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1459 [2021-07-13 19:25:23,198 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:23,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:23,199 INFO L82 PathProgramCache]: Analyzing trace with hash -316814669, now seen corresponding path program 419 times [2021-07-13 19:25:23,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:23,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733163118] [2021-07-13 19:25:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:23,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733163118] [2021-07-13 19:25:23,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733163118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:23,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637617724] [2021-07-13 19:25:23,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:23,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-13 19:25:23,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:23,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:23,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637617724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:23,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:23,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 18 [2021-07-13 19:25:23,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601675035] [2021-07-13 19:25:23,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:25:23,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:23,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:25:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:23,458 INFO L87 Difference]: Start difference. First operand 23319 states and 60082 transitions. Second operand has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:23,851 INFO L93 Difference]: Finished difference Result 29012 states and 70223 transitions. [2021-07-13 19:25:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:23,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:23,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:23,909 INFO L225 Difference]: With dead ends: 29012 [2021-07-13 19:25:23,910 INFO L226 Difference]: Without dead ends: 28979 [2021-07-13 19:25:23,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:25:23,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28979 states. [2021-07-13 19:25:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28979 to 23319. [2021-07-13 19:25:24,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23319 states, 23318 states have (on average 2.5762501072133115) internal successors, (60073), 23318 states have internal predecessors, (60073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:24,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60073 transitions. [2021-07-13 19:25:24,464 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60073 transitions. Word has length 65 [2021-07-13 19:25:24,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:24,464 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60073 transitions. [2021-07-13 19:25:24,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 18 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60073 transitions. [2021-07-13 19:25:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:24,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:24,484 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:24,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1460,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:24,684 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:24,685 INFO L82 PathProgramCache]: Analyzing trace with hash -763108856, now seen corresponding path program 420 times [2021-07-13 19:25:24,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:24,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907040474] [2021-07-13 19:25:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:24,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:24,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907040474] [2021-07-13 19:25:24,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907040474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:24,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682588741] [2021-07-13 19:25:24,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:24,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 19:25:24,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:25:24,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:25,267 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:25:25,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-07-13 19:25:25,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:25,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:25,276 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:25:25,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:25,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2021-07-13 19:25:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:25,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682588741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:25,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:25,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 31 [2021-07-13 19:25:25,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551607998] [2021-07-13 19:25:25,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 19:25:25,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:25,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 19:25:25,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:25:25,312 INFO L87 Difference]: Start difference. First operand 23319 states and 60073 transitions. Second operand has 32 states, 32 states have (on average 3.78125) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:32,255 INFO L93 Difference]: Finished difference Result 59239 states and 136732 transitions. [2021-07-13 19:25:32,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-07-13 19:25:32,256 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:32,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:32,393 INFO L225 Difference]: With dead ends: 59239 [2021-07-13 19:25:32,393 INFO L226 Difference]: Without dead ends: 58649 [2021-07-13 19:25:32,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25814 ImplicationChecksByTransitivity, 4876.9ms TimeCoverageRelationStatistics Valid=3924, Invalid=59328, Unknown=0, NotChecked=0, Total=63252 [2021-07-13 19:25:32,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58649 states. [2021-07-13 19:25:33,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58649 to 25834. [2021-07-13 19:25:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25834 states, 25833 states have (on average 2.587659195602524) internal successors, (66847), 25833 states have internal predecessors, (66847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66847 transitions. [2021-07-13 19:25:33,246 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66847 transitions. Word has length 65 [2021-07-13 19:25:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:33,246 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66847 transitions. [2021-07-13 19:25:33,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 3.78125) internal successors, (121), 31 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66847 transitions. [2021-07-13 19:25:33,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:33,267 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:33,267 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:33,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-07-13 19:25:33,468 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:33,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1130464013, now seen corresponding path program 421 times [2021-07-13 19:25:33,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:33,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769496370] [2021-07-13 19:25:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:33,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:33,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769496370] [2021-07-13 19:25:33,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769496370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:33,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992126328] [2021-07-13 19:25:33,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:33,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:33,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:33,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992126328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:33,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:33,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-13 19:25:33,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8331005] [2021-07-13 19:25:33,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:25:33,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:33,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:25:33,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:25:33,725 INFO L87 Difference]: Start difference. First operand 25834 states and 66847 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:34,071 INFO L93 Difference]: Finished difference Result 31663 states and 77216 transitions. [2021-07-13 19:25:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:25:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:34,134 INFO L225 Difference]: With dead ends: 31663 [2021-07-13 19:25:34,134 INFO L226 Difference]: Without dead ends: 31621 [2021-07-13 19:25:34,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:25:34,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31621 states. [2021-07-13 19:25:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31621 to 25834. [2021-07-13 19:25:34,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25834 states, 25833 states have (on average 2.5873108040103743) internal successors, (66838), 25833 states have internal predecessors, (66838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66838 transitions. [2021-07-13 19:25:34,904 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66838 transitions. Word has length 65 [2021-07-13 19:25:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:34,904 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66838 transitions. [2021-07-13 19:25:34,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66838 transitions. [2021-07-13 19:25:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:34,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:34,925 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:35,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 677 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1468 [2021-07-13 19:25:35,126 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:35,126 INFO L82 PathProgramCache]: Analyzing trace with hash -916422722, now seen corresponding path program 422 times [2021-07-13 19:25:35,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:35,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14635030] [2021-07-13 19:25:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:35,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:35,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14635030] [2021-07-13 19:25:35,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14635030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509856820] [2021-07-13 19:25:35,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:35,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:35,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:35,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:25:35,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:35,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509856820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:35,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-13 19:25:35,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425037941] [2021-07-13 19:25:35,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:25:35,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:35,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:25:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:25:35,381 INFO L87 Difference]: Start difference. First operand 25834 states and 66838 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:35,763 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-07-13 19:25:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:39,837 INFO L93 Difference]: Finished difference Result 71126 states and 168440 transitions. [2021-07-13 19:25:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-07-13 19:25:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:39,990 INFO L225 Difference]: With dead ends: 71126 [2021-07-13 19:25:39,990 INFO L226 Difference]: Without dead ends: 69986 [2021-07-13 19:25:39,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15591 ImplicationChecksByTransitivity, 2956.0ms TimeCoverageRelationStatistics Valid=2433, Invalid=34623, Unknown=0, NotChecked=0, Total=37056 [2021-07-13 19:25:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69986 states. [2021-07-13 19:25:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69986 to 29289. [2021-07-13 19:25:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29289 states, 29288 states have (on average 2.5868615132477464) internal successors, (75764), 29288 states have internal predecessors, (75764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75764 transitions. [2021-07-13 19:25:41,073 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75764 transitions. Word has length 65 [2021-07-13 19:25:41,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:41,073 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75764 transitions. [2021-07-13 19:25:41,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,073 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75764 transitions. [2021-07-13 19:25:41,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:41,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:41,093 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:41,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-07-13 19:25:41,293 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash -167005069, now seen corresponding path program 423 times [2021-07-13 19:25:41,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:41,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954746560] [2021-07-13 19:25:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:41,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:41,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954746560] [2021-07-13 19:25:41,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954746560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:41,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010111287] [2021-07-13 19:25:41,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:41,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-13 19:25:41,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:41,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:41,546 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:41,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010111287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:41,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:41,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-13 19:25:41,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466200369] [2021-07-13 19:25:41,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:25:41,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:41,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:25:41,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:25:41,547 INFO L87 Difference]: Start difference. First operand 29289 states and 75764 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:41,890 INFO L93 Difference]: Finished difference Result 35769 states and 87381 transitions. [2021-07-13 19:25:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:25:41,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:42,079 INFO L225 Difference]: With dead ends: 35769 [2021-07-13 19:25:42,079 INFO L226 Difference]: Without dead ends: 35718 [2021-07-13 19:25:42,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:25:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35718 states. [2021-07-13 19:25:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35718 to 29289. [2021-07-13 19:25:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29289 states, 29288 states have (on average 2.5865542201584266) internal successors, (75755), 29288 states have internal predecessors, (75755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75755 transitions. [2021-07-13 19:25:42,751 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75755 transitions. Word has length 65 [2021-07-13 19:25:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:42,751 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75755 transitions. [2021-07-13 19:25:42,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75755 transitions. [2021-07-13 19:25:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:42,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:42,774 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:42,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-07-13 19:25:42,974 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:42,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:42,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1555398216, now seen corresponding path program 424 times [2021-07-13 19:25:42,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:42,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441295814] [2021-07-13 19:25:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:43,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441295814] [2021-07-13 19:25:43,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441295814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:43,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425010653] [2021-07-13 19:25:43,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:43,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:43,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-13 19:25:43,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:43,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425010653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:43,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:43,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-13 19:25:43,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874727693] [2021-07-13 19:25:43,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:25:43,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:25:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:25:43,244 INFO L87 Difference]: Start difference. First operand 29289 states and 75755 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:50,885 INFO L93 Difference]: Finished difference Result 133248 states and 309294 transitions. [2021-07-13 19:25:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 321 states. [2021-07-13 19:25:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:51,246 INFO L225 Difference]: With dead ends: 133248 [2021-07-13 19:25:51,246 INFO L226 Difference]: Without dead ends: 129774 [2021-07-13 19:25:51,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46200 ImplicationChecksByTransitivity, 5627.1ms TimeCoverageRelationStatistics Valid=5835, Invalid=96885, Unknown=0, NotChecked=0, Total=102720 [2021-07-13 19:25:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129774 states. [2021-07-13 19:25:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129774 to 34615. [2021-07-13 19:25:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34615 states, 34614 states have (on average 2.584618940313168) internal successors, (89464), 34614 states have internal predecessors, (89464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34615 states to 34615 states and 89464 transitions. [2021-07-13 19:25:53,478 INFO L78 Accepts]: Start accepts. Automaton has 34615 states and 89464 transitions. Word has length 65 [2021-07-13 19:25:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:53,478 INFO L482 AbstractCegarLoop]: Abstraction has 34615 states and 89464 transitions. [2021-07-13 19:25:53,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 34615 states and 89464 transitions. [2021-07-13 19:25:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:53,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:53,502 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:53,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:53,718 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:53,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1637237069, now seen corresponding path program 425 times [2021-07-13 19:25:53,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:53,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116162254] [2021-07-13 19:25:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 65 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:53,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:53,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116162254] [2021-07-13 19:25:53,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116162254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:53,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286962992] [2021-07-13 19:25:54,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:54,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 19:25:54,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:54,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 19:25:54,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:54,298 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 65 proven. 161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:54,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286962992] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:54,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:54,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 21 [2021-07-13 19:25:54,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881677941] [2021-07-13 19:25:54,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:25:54,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:54,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:25:54,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:25:54,299 INFO L87 Difference]: Start difference. First operand 34615 states and 89464 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:54,869 INFO L93 Difference]: Finished difference Result 42327 states and 103472 transitions. [2021-07-13 19:25:54,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:54,870 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-13 19:25:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:54,964 INFO L225 Difference]: With dead ends: 42327 [2021-07-13 19:25:54,964 INFO L226 Difference]: Without dead ends: 42267 [2021-07-13 19:25:54,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:25:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42267 states. [2021-07-13 19:25:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42267 to 34615. [2021-07-13 19:25:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34615 states, 34614 states have (on average 2.584358929912752) internal successors, (89455), 34614 states have internal predecessors, (89455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34615 states to 34615 states and 89455 transitions. [2021-07-13 19:25:56,108 INFO L78 Accepts]: Start accepts. Automaton has 34615 states and 89455 transitions. Word has length 65 [2021-07-13 19:25:56,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:56,108 INFO L482 AbstractCegarLoop]: Abstraction has 34615 states and 89455 transitions. [2021-07-13 19:25:56,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 21 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,108 INFO L276 IsEmpty]: Start isEmpty. Operand 34615 states and 89455 transitions. [2021-07-13 19:25:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-13 19:25:56,130 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:56,130 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:56,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1483,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:56,331 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:56,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1936295042, now seen corresponding path program 426 times [2021-07-13 19:25:56,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:56,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375027249] [2021-07-13 19:25:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:56,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:56,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:56,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375027249] [2021-07-13 19:25:56,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375027249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:56,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882909192] [2021-07-13 19:25:56,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:56,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-13 19:25:56,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:56,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 19:25:56,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:57,045 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-13 19:25:57,404 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-13 19:25:57,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-07-13 19:25:57,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:25:57,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:25:57,413 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-13 19:25:57,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:25:57,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2021-07-13 19:25:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:25:57,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882909192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:57,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:57,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 37 [2021-07-13 19:25:57,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961971309] [2021-07-13 19:25:57,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-07-13 19:25:57,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:57,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-07-13 19:25:57,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:25:57,457 INFO L87 Difference]: Start difference. First operand 34615 states and 89455 transitions. Second operand has 38 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 37 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-07-13 19:26:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 783 states. [2021-07-13 19:26:25,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1491,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:25,869 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:26:25,871 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:26:25,872 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:26:25,872 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:26:25 BasicIcfg [2021-07-13 19:26:25,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:26:25,873 INFO L168 Benchmark]: Toolchain (without parser) took 893753.84 ms. Allocated memory was 206.6 MB in the beginning and 6.9 GB in the end (delta: 6.7 GB). Free memory was 185.9 MB in the beginning and 4.6 GB in the end (delta: -4.4 GB). Peak memory consumption was 2.3 GB. Max. memory is 8.0 GB. [2021-07-13 19:26:25,873 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 206.6 MB. Free memory is still 187.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:26:25,873 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.83 ms. Allocated memory is still 206.6 MB. Free memory was 185.8 MB in the beginning and 184.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:26:25,873 INFO L168 Benchmark]: Boogie Preprocessor took 14.41 ms. Allocated memory is still 206.6 MB. Free memory was 184.4 MB in the beginning and 183.5 MB in the end (delta: 909.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:26:25,873 INFO L168 Benchmark]: RCFGBuilder took 251.62 ms. Allocated memory is still 206.6 MB. Free memory was 183.4 MB in the beginning and 172.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-07-13 19:26:25,873 INFO L168 Benchmark]: TraceAbstraction took 893460.11 ms. Allocated memory was 206.6 MB in the beginning and 6.9 GB in the end (delta: 6.7 GB). Free memory was 171.9 MB in the beginning and 4.6 GB in the end (delta: -4.4 GB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. [2021-07-13 19:26:25,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 206.6 MB. Free memory is still 187.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.83 ms. Allocated memory is still 206.6 MB. Free memory was 185.8 MB in the beginning and 184.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.41 ms. Allocated memory is still 206.6 MB. Free memory was 184.4 MB in the beginning and 183.5 MB in the end (delta: 909.6 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 251.62 ms. Allocated memory is still 206.6 MB. Free memory was 183.4 MB in the beginning and 172.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 893460.11 ms. Allocated memory was 206.6 MB in the beginning and 6.9 GB in the end (delta: 6.7 GB). Free memory was 171.9 MB in the beginning and 4.6 GB in the end (delta: -4.4 GB). Peak memory consumption was 2.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (34615states) and FLOYD_HOARE automaton (currently 783 states, 38 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 788 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 893388.4ms, OverallIterations: 690, TraceHistogramMax: 10, EmptinessCheckTime: 6916.9ms, AutomataDifference: 450191.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42943 SDtfs, 219958 SDslu, 295497 SDs, 0 SdLazy, 466356 SolverSat, 17552 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 164407.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54786 GetRequests, 35564 SyntacticMatches, 809 SemanticMatches, 18412 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948708 ImplicationChecksByTransitivity, 232624.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34615occurred in iteration=688, InterpolantAutomatonStates: 17037, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 158464.8ms AutomataMinimizationTime, 689 MinimizatonAttempts, 2683434 StatesRemovedByMinimization, 686 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1874.4ms SsaConstructionTime, 9730.8ms SatisfiabilityAnalysisTime, 116087.8ms InterpolantComputationTime, 69168 NumberOfCodeBlocks, 69147 NumberOfCodeBlocksAsserted, 4643 NumberOfCheckSat, 67797 ConstructedInterpolants, 661 QuantifiedInterpolants, 524730 SizeOfPredicates, 1215 NumberOfNonLiveVariables, 79425 ConjunctsInSsa, 14813 ConjunctsInUnsatCore, 1371 InterpolantComputations, 11 PerfectInterpolantSequences, 59227/180187 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown