/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/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:30:36,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:30:36,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:30:36,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:30:36,310 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 [2021-06-12 20:30:36,357 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:30:36,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:30:36,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:30:36,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:30:36,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:30:36,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:30:36,363 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:30:36,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:30:36,363 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:30:36,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:30:36,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:30:36,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:30:36,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:30:36,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:30:36,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:30:36,365 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:30:36,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:30:36,365 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:30:36,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:30:36,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:30:36,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:30:36,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:30:36,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:30:36,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:30:36,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:30:36,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:30:36,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:30:36,367 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:30:36,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:30:36,367 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:30:36,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:30:36,368 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:30:36,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:30:36,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:30:36,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:30:36,715 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:30:36,717 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:30:36,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2021-06-12 20:30:36,717 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-06-12 20:30:36,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:30:36,782 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:30:36,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:30:36,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:30:36,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:30:36,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/1) ... [2021-06-12 20:30:36,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/1) ... [2021-06-12 20:30:36,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:30:36,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:30:36,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:30:36,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:30:36,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/1) ... [2021-06-12 20:30:36,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/1) ... [2021-06-12 20:30:36,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/1) ... [2021-06-12 20:30:36,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/1) ... [2021-06-12 20:30:36,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/1) ... [2021-06-12 20:30:36,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/1) ... [2021-06-12 20:30:36,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/1) ... [2021-06-12 20:30:36,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:30:36,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:30:36,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:30:36,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:30:36,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (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 [2021-06-12 20:30:36,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:30:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:30:36,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:30:36,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:30:36,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:30:36,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:30:36,928 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:30:36,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:30:36,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:30:36,929 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 20:30:37,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:30:37,058 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 20:30:37,060 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:30:37 BoogieIcfgContainer [2021-06-12 20:30:37,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:30:37,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:30:37,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:30:37,064 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:30:37,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:30:36" (1/2) ... [2021-06-12 20:30:37,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13777a12 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:30:37, skipping insertion in model container [2021-06-12 20:30:37,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:30:37" (2/2) ... [2021-06-12 20:30:37,076 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-06-12 20:30:37,081 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:30:37,081 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:30:37,081 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:30:37,082 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:30:37,111 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 20:30:37,129 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:30:37,161 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:30:37,161 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:30:37,161 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:30:37,161 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:30:37,162 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:30:37,162 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:30:37,162 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:30:37,162 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:30:37,169 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2021-06-12 20:30:37,196 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 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) [2021-06-12 20:30:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 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) [2021-06-12 20:30:37,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 20:30:37,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:37,205 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:37,205 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash -523912972, now seen corresponding path program 1 times [2021-06-12 20:30:37,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:37,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435076776] [2021-06-12 20:30:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:37,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:37,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435076776] [2021-06-12 20:30:37,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435076776] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:30:37,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:30:37,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 20:30:37,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706741388] [2021-06-12 20:30:37,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:30:37,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:30:37,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:30:37,414 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 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) 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) [2021-06-12 20:30:37,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:37,469 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2021-06-12 20:30:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:30:37,471 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 [2021-06-12 20:30:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:37,487 INFO L225 Difference]: With dead ends: 134 [2021-06-12 20:30:37,487 INFO L226 Difference]: Without dead ends: 127 [2021-06-12 20:30:37,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:30:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-12 20:30:37,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-06-12 20:30:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-06-12 20:30:37,571 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2021-06-12 20:30:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:37,571 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-06-12 20:30:37,571 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) [2021-06-12 20:30:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-06-12 20:30:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:30:37,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:37,574 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:37,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:30:37,575 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:37,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1655401882, now seen corresponding path program 1 times [2021-06-12 20:30:37,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:37,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948407343] [2021-06-12 20:30:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:37,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:37,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948407343] [2021-06-12 20:30:37,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948407343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:37,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041003247] [2021-06-12 20:30:37,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 20:30:37,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:37,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-12 20:30:37,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:37,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041003247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:37,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:37,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-12 20:30:37,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685387768] [2021-06-12 20:30:37,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:30:37,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:37,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:30:37,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:30:37,860 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:37,924 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-06-12 20:30:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:30:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:30:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:37,927 INFO L225 Difference]: With dead ends: 169 [2021-06-12 20:30:37,927 INFO L226 Difference]: Without dead ends: 169 [2021-06-12 20:30:37,928 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:37,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-12 20:30:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-06-12 20:30:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-06-12 20:30:37,935 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2021-06-12 20:30:37,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:37,935 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-06-12 20:30:37,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-06-12 20:30:37,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:30:37,937 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:37,937 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:38,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 20:30:38,161 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:38,162 INFO L82 PathProgramCache]: Analyzing trace with hash -965799907, now seen corresponding path program 1 times [2021-06-12 20:30:38,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:38,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578381329] [2021-06-12 20:30:38,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:38,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:38,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578381329] [2021-06-12 20:30:38,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578381329] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:30:38,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:30:38,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:30:38,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592706879] [2021-06-12 20:30:38,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:30:38,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:30:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:30:38,188 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:38,242 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-06-12 20:30:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:30:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:30:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:38,244 INFO L225 Difference]: With dead ends: 188 [2021-06-12 20:30:38,244 INFO L226 Difference]: Without dead ends: 183 [2021-06-12 20:30:38,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-06-12 20:30:38,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2021-06-12 20:30:38,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 121 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2021-06-12 20:30:38,253 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2021-06-12 20:30:38,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:38,253 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2021-06-12 20:30:38,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,254 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2021-06-12 20:30:38,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:30:38,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:38,255 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:38,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 20:30:38,255 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:38,256 INFO L82 PathProgramCache]: Analyzing trace with hash 798457899, now seen corresponding path program 2 times [2021-06-12 20:30:38,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:38,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980447727] [2021-06-12 20:30:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:38,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:38,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:38,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980447727] [2021-06-12 20:30:38,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980447727] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:30:38,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:30:38,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:30:38,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328426818] [2021-06-12 20:30:38,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:30:38,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:38,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:30:38,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:30:38,286 INFO L87 Difference]: Start difference. First operand 122 states and 263 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:38,337 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2021-06-12 20:30:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:30:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:30:38,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:38,340 INFO L225 Difference]: With dead ends: 156 [2021-06-12 20:30:38,340 INFO L226 Difference]: Without dead ends: 156 [2021-06-12 20:30:38,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-06-12 20:30:38,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2021-06-12 20:30:38,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-06-12 20:30:38,348 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-06-12 20:30:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:38,348 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-06-12 20:30:38,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,348 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-06-12 20:30:38,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:30:38,349 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:38,349 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:38,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:30:38,350 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1004932738, now seen corresponding path program 2 times [2021-06-12 20:30:38,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:38,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620626726] [2021-06-12 20:30:38,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:38,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:38,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620626726] [2021-06-12 20:30:38,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620626726] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:30:38,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:30:38,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:30:38,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614723938] [2021-06-12 20:30:38,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:30:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:38,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:30:38,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:30:38,384 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:38,422 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-06-12 20:30:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:30:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:30:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:38,423 INFO L225 Difference]: With dead ends: 156 [2021-06-12 20:30:38,423 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 20:30:38,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 20:30:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2021-06-12 20:30:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2021-06-12 20:30:38,440 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2021-06-12 20:30:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:38,440 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2021-06-12 20:30:38,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2021-06-12 20:30:38,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:30:38,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:38,454 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:38,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:30:38,454 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:38,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1060614677, now seen corresponding path program 1 times [2021-06-12 20:30:38,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:38,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414269339] [2021-06-12 20:30:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:38,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:38,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414269339] [2021-06-12 20:30:38,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414269339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:38,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236713652] [2021-06-12 20:30:38,575 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 [2021-06-12 20:30:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:38,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 20:30:38,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:38,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236713652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:38,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:38,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-06-12 20:30:38,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495186282] [2021-06-12 20:30:38,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:30:38,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:38,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:30:38,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:30:38,686 INFO L87 Difference]: Start difference. First operand 104 states and 223 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) [2021-06-12 20:30:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:38,809 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2021-06-12 20:30:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:30:38,810 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 21 [2021-06-12 20:30:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:38,811 INFO L225 Difference]: With dead ends: 226 [2021-06-12 20:30:38,811 INFO L226 Difference]: Without dead ends: 226 [2021-06-12 20:30:38,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:30:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-06-12 20:30:38,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-06-12 20:30:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2024539877300615) internal successors, (359), 163 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2021-06-12 20:30:38,834 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2021-06-12 20:30:38,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:38,834 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2021-06-12 20:30:38,835 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) [2021-06-12 20:30:38,835 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2021-06-12 20:30:38,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:30:38,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:38,836 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:39,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:39,037 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:39,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:39,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1348728101, now seen corresponding path program 2 times [2021-06-12 20:30:39,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:39,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549282310] [2021-06-12 20:30:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:39,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:39,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549282310] [2021-06-12 20:30:39,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549282310] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:30:39,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:30:39,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:30:39,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364121155] [2021-06-12 20:30:39,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:30:39,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:39,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:30:39,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:30:39,057 INFO L87 Difference]: Start difference. First operand 164 states and 359 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-06-12 20:30:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:39,067 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2021-06-12 20:30:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:30:39,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 [2021-06-12 20:30:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:39,069 INFO L225 Difference]: With dead ends: 266 [2021-06-12 20:30:39,069 INFO L226 Difference]: Without dead ends: 266 [2021-06-12 20:30:39,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:30:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-12 20:30:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-06-12 20:30:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.171673819742489) internal successors, (506), 233 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2021-06-12 20:30:39,079 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2021-06-12 20:30:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:39,079 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2021-06-12 20:30:39,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-06-12 20:30:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2021-06-12 20:30:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:30:39,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:39,081 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:39,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-12 20:30:39,082 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:39,082 INFO L82 PathProgramCache]: Analyzing trace with hash -505952581, now seen corresponding path program 1 times [2021-06-12 20:30:39,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:39,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084081570] [2021-06-12 20:30:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:39,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:39,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084081570] [2021-06-12 20:30:39,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084081570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:39,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441913051] [2021-06-12 20:30:39,125 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 [2021-06-12 20:30:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:39,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:30:39,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:39,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441913051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:39,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:39,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:39,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013564979] [2021-06-12 20:30:39,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:39,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:39,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:39,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:39,286 INFO L87 Difference]: Start difference. First operand 234 states and 506 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) [2021-06-12 20:30:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:39,367 INFO L93 Difference]: Finished difference Result 562 states and 1200 transitions. [2021-06-12 20:30:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:30:39,367 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 [2021-06-12 20:30:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:39,370 INFO L225 Difference]: With dead ends: 562 [2021-06-12 20:30:39,370 INFO L226 Difference]: Without dead ends: 562 [2021-06-12 20:30:39,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:30:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-12 20:30:39,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 438. [2021-06-12 20:30:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.265446224256293) internal successors, (990), 437 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 990 transitions. [2021-06-12 20:30:39,387 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 990 transitions. Word has length 26 [2021-06-12 20:30:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:39,388 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 990 transitions. [2021-06-12 20:30:39,388 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) [2021-06-12 20:30:39,389 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 990 transitions. [2021-06-12 20:30:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:30:39,392 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:39,393 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:39,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:39,612 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1335579773, now seen corresponding path program 2 times [2021-06-12 20:30:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812957757] [2021-06-12 20:30:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:39,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:39,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812957757] [2021-06-12 20:30:39,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812957757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:39,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447077509] [2021-06-12 20:30:39,647 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 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 [2021-06-12 20:30:39,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:30:39,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:39,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:30:39,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:39,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447077509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:39,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:39,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:30:39,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615127927] [2021-06-12 20:30:39,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:30:39,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:39,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:30:39,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:39,754 INFO L87 Difference]: Start difference. First operand 438 states and 990 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-06-12 20:30:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:39,810 INFO L93 Difference]: Finished difference Result 491 states and 1077 transitions. [2021-06-12 20:30:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:30:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 [2021-06-12 20:30:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:39,814 INFO L225 Difference]: With dead ends: 491 [2021-06-12 20:30:39,814 INFO L226 Difference]: Without dead ends: 487 [2021-06-12 20:30:39,814 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-12 20:30:39,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 440. [2021-06-12 20:30:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2574031890660593) internal successors, (991), 439 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 991 transitions. [2021-06-12 20:30:39,828 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 991 transitions. Word has length 26 [2021-06-12 20:30:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:39,829 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 991 transitions. [2021-06-12 20:30:39,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-06-12 20:30:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 991 transitions. [2021-06-12 20:30:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:30:39,831 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:39,831 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:40,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:40,045 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:40,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:40,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1641841895, now seen corresponding path program 3 times [2021-06-12 20:30:40,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:40,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210159389] [2021-06-12 20:30:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:40,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:40,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:40,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210159389] [2021-06-12 20:30:40,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210159389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:40,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293635887] [2021-06-12 20:30:40,082 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 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 [2021-06-12 20:30:40,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:30:40,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:40,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:30:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:40,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293635887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:40,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:40,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:30:40,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606529393] [2021-06-12 20:30:40,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:30:40,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:40,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:30:40,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:40,187 INFO L87 Difference]: Start difference. First operand 440 states and 991 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-06-12 20:30:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:40,241 INFO L93 Difference]: Finished difference Result 771 states and 1695 transitions. [2021-06-12 20:30:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:30:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 [2021-06-12 20:30:40,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:40,247 INFO L225 Difference]: With dead ends: 771 [2021-06-12 20:30:40,247 INFO L226 Difference]: Without dead ends: 771 [2021-06-12 20:30:40,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-06-12 20:30:40,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 634. [2021-06-12 20:30:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3175355450236967) internal successors, (1467), 633 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1467 transitions. [2021-06-12 20:30:40,263 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1467 transitions. Word has length 26 [2021-06-12 20:30:40,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:40,263 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1467 transitions. [2021-06-12 20:30:40,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-06-12 20:30:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1467 transitions. [2021-06-12 20:30:40,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:30:40,265 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:40,265 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:40,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 20:30:40,488 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:40,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:40,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1483069401, now seen corresponding path program 4 times [2021-06-12 20:30:40,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:40,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032002570] [2021-06-12 20:30:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:40,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:40,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032002570] [2021-06-12 20:30:40,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032002570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:40,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815581208] [2021-06-12 20:30:40,524 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:40,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:30:40,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:40,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:30:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:40,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:40,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815581208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:40,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:40,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:30:40,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356746642] [2021-06-12 20:30:40,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:30:40,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:30:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:40,632 INFO L87 Difference]: Start difference. First operand 634 states and 1467 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-06-12 20:30:40,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:40,685 INFO L93 Difference]: Finished difference Result 763 states and 1678 transitions. [2021-06-12 20:30:40,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:30:40,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 [2021-06-12 20:30:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:40,689 INFO L225 Difference]: With dead ends: 763 [2021-06-12 20:30:40,689 INFO L226 Difference]: Without dead ends: 759 [2021-06-12 20:30:40,689 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-06-12 20:30:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 634. [2021-06-12 20:30:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3143759873617693) internal successors, (1465), 633 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1465 transitions. [2021-06-12 20:30:40,706 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1465 transitions. Word has length 26 [2021-06-12 20:30:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:40,707 INFO L482 AbstractCegarLoop]: Abstraction has 634 states and 1465 transitions. [2021-06-12 20:30:40,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-06-12 20:30:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1465 transitions. [2021-06-12 20:30:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:30:40,708 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:40,709 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:40,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:40,921 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:40,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:40,921 INFO L82 PathProgramCache]: Analyzing trace with hash 275158029, now seen corresponding path program 5 times [2021-06-12 20:30:40,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:40,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914047281] [2021-06-12 20:30:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:40,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:40,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914047281] [2021-06-12 20:30:40,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914047281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:40,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826327172] [2021-06-12 20:30:40,957 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 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 [2021-06-12 20:30:40,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:30:40,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:30:40,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:41,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:41,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826327172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:41,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:41,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:41,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202219579] [2021-06-12 20:30:41,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:41,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:41,054 INFO L87 Difference]: Start difference. First operand 634 states and 1465 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) [2021-06-12 20:30:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:41,137 INFO L93 Difference]: Finished difference Result 741 states and 1639 transitions. [2021-06-12 20:30:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:30:41,137 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 [2021-06-12 20:30:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:41,141 INFO L225 Difference]: With dead ends: 741 [2021-06-12 20:30:41,141 INFO L226 Difference]: Without dead ends: 721 [2021-06-12 20:30:41,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:30:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-12 20:30:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 654. [2021-06-12 20:30:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.2833078101071975) internal successors, (1491), 653 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2021-06-12 20:30:41,157 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2021-06-12 20:30:41,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:41,157 INFO L482 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2021-06-12 20:30:41,157 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) [2021-06-12 20:30:41,157 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2021-06-12 20:30:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:30:41,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:41,159 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:41,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:41,384 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:41,384 INFO L82 PathProgramCache]: Analyzing trace with hash 590448310, now seen corresponding path program 6 times [2021-06-12 20:30:41,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:41,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546058126] [2021-06-12 20:30:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:30:41,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:41,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546058126] [2021-06-12 20:30:41,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546058126] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:30:41,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:30:41,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:30:41,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820688226] [2021-06-12 20:30:41,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:30:41,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:41,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:30:41,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:30:41,407 INFO L87 Difference]: Start difference. First operand 654 states and 1491 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2021-06-12 20:30:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:41,420 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2021-06-12 20:30:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:30:41,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 31 [2021-06-12 20:30:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:41,425 INFO L225 Difference]: With dead ends: 1106 [2021-06-12 20:30:41,425 INFO L226 Difference]: Without dead ends: 1106 [2021-06-12 20:30:41,425 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:30:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-12 20:30:41,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2021-06-12 20:30:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.2030947775628626) internal successors, (2278), 1034 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2021-06-12 20:30:41,447 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2021-06-12 20:30:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:41,448 INFO L482 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2021-06-12 20:30:41,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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) [2021-06-12 20:30:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2021-06-12 20:30:41,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:30:41,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:41,450 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:41,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-12 20:30:41,451 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:41,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:41,451 INFO L82 PathProgramCache]: Analyzing trace with hash 655092438, now seen corresponding path program 1 times [2021-06-12 20:30:41,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:41,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005198026] [2021-06-12 20:30:41,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:30:41,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:41,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005198026] [2021-06-12 20:30:41,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005198026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:41,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907876856] [2021-06-12 20:30:41,494 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-06-12 20:30:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:30:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:30:41,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907876856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:41,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:41,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:30:41,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845546343] [2021-06-12 20:30:41,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:30:41,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:41,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:30:41,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:41,608 INFO L87 Difference]: Start difference. First operand 1035 states and 2278 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-12 20:30:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:41,643 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2021-06-12 20:30:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:30:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 31 [2021-06-12 20:30:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:41,649 INFO L225 Difference]: With dead ends: 1734 [2021-06-12 20:30:41,649 INFO L226 Difference]: Without dead ends: 1715 [2021-06-12 20:30:41,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-06-12 20:30:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1571. [2021-06-12 20:30:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.212738853503185) internal successors, (3474), 1570 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3474 transitions. [2021-06-12 20:30:41,708 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3474 transitions. Word has length 31 [2021-06-12 20:30:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:41,708 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3474 transitions. [2021-06-12 20:30:41,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-12 20:30:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3474 transitions. [2021-06-12 20:30:41,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:30:41,711 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:41,711 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:41,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 20:30:41,925 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:41,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1389409942, now seen corresponding path program 2 times [2021-06-12 20:30:41,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:41,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898604885] [2021-06-12 20:30:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:30:41,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:41,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898604885] [2021-06-12 20:30:41,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898604885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:41,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129872904] [2021-06-12 20:30:41,982 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 [2021-06-12 20:30:42,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:30:42,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:42,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:30:42,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:30:42,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129872904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:42,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:42,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:30:42,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553795276] [2021-06-12 20:30:42,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:30:42,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:42,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:30:42,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:42,096 INFO L87 Difference]: Start difference. First operand 1571 states and 3474 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-12 20:30:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:42,136 INFO L93 Difference]: Finished difference Result 2696 states and 5884 transitions. [2021-06-12 20:30:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:30:42,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 31 [2021-06-12 20:30:42,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:42,146 INFO L225 Difference]: With dead ends: 2696 [2021-06-12 20:30:42,146 INFO L226 Difference]: Without dead ends: 2677 [2021-06-12 20:30:42,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-12 20:30:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2412. [2021-06-12 20:30:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.2310244711737868) internal successors, (5379), 2411 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5379 transitions. [2021-06-12 20:30:42,203 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5379 transitions. Word has length 31 [2021-06-12 20:30:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:42,203 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 5379 transitions. [2021-06-12 20:30:42,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-12 20:30:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5379 transitions. [2021-06-12 20:30:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:30:42,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:42,208 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:42,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:30:42,427 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1015199406, now seen corresponding path program 3 times [2021-06-12 20:30:42,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:42,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152249094] [2021-06-12 20:30:42,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:42,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152249094] [2021-06-12 20:30:42,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152249094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:42,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666674304] [2021-06-12 20:30:42,475 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 [2021-06-12 20:30:42,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:30:42,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:42,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:30:42,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:42,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666674304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:42,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:42,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:42,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949953020] [2021-06-12 20:30:42,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:42,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:42,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:42,590 INFO L87 Difference]: Start difference. First operand 2412 states and 5379 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-12 20:30:42,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:42,659 INFO L93 Difference]: Finished difference Result 4261 states and 9366 transitions. [2021-06-12 20:30:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:30:42,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 31 [2021-06-12 20:30:42,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:42,675 INFO L225 Difference]: With dead ends: 4261 [2021-06-12 20:30:42,675 INFO L226 Difference]: Without dead ends: 4236 [2021-06-12 20:30:42,676 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-12 20:30:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3410. [2021-06-12 20:30:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.24435318275154) internal successors, (7651), 3409 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 7651 transitions. [2021-06-12 20:30:42,783 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 7651 transitions. Word has length 31 [2021-06-12 20:30:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:42,784 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 7651 transitions. [2021-06-12 20:30:42,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-12 20:30:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 7651 transitions. [2021-06-12 20:30:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:30:42,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:42,789 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:43,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 20:30:43,005 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:43,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:43,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2091115922, now seen corresponding path program 4 times [2021-06-12 20:30:43,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:43,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901415881] [2021-06-12 20:30:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:43,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:43,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901415881] [2021-06-12 20:30:43,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901415881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:43,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60406815] [2021-06-12 20:30:43,068 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 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 [2021-06-12 20:30:43,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:30:43,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:43,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:30:43,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:43,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60406815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:43,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:43,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:43,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744973257] [2021-06-12 20:30:43,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:43,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:43,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:43,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:43,185 INFO L87 Difference]: Start difference. First operand 3410 states and 7651 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-12 20:30:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:43,247 INFO L93 Difference]: Finished difference Result 4354 states and 9576 transitions. [2021-06-12 20:30:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:30:43,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 31 [2021-06-12 20:30:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:43,263 INFO L225 Difference]: With dead ends: 4354 [2021-06-12 20:30:43,263 INFO L226 Difference]: Without dead ends: 4335 [2021-06-12 20:30:43,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:43,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-12 20:30:43,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3543. [2021-06-12 20:30:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.2478825522303785) internal successors, (7962), 3542 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:43,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 7962 transitions. [2021-06-12 20:30:43,349 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 7962 transitions. Word has length 31 [2021-06-12 20:30:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:43,350 INFO L482 AbstractCegarLoop]: Abstraction has 3543 states and 7962 transitions. [2021-06-12 20:30:43,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-12 20:30:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 7962 transitions. [2021-06-12 20:30:43,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:30:43,356 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:43,356 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:43,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:30:43,573 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:43,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:43,573 INFO L82 PathProgramCache]: Analyzing trace with hash 702036756, now seen corresponding path program 5 times [2021-06-12 20:30:43,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:43,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918475548] [2021-06-12 20:30:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:30:43,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:43,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918475548] [2021-06-12 20:30:43,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918475548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:43,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284136190] [2021-06-12 20:30:43,619 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 [2021-06-12 20:30:43,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:30:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:43,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:30:43,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:30:43,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284136190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:43,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:43,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:30:43,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252999541] [2021-06-12 20:30:43,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:30:43,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:43,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:30:43,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:43,737 INFO L87 Difference]: Start difference. First operand 3543 states and 7962 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-12 20:30:43,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:43,778 INFO L93 Difference]: Finished difference Result 4170 states and 9274 transitions. [2021-06-12 20:30:43,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:30:43,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 31 [2021-06-12 20:30:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:43,792 INFO L225 Difference]: With dead ends: 4170 [2021-06-12 20:30:43,792 INFO L226 Difference]: Without dead ends: 4151 [2021-06-12 20:30:43,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:30:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-12 20:30:43,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3929. [2021-06-12 20:30:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 2.253818737270876) internal successors, (8853), 3928 states have internal predecessors, (8853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 8853 transitions. [2021-06-12 20:30:43,870 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 8853 transitions. Word has length 31 [2021-06-12 20:30:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:43,870 INFO L482 AbstractCegarLoop]: Abstraction has 3929 states and 8853 transitions. [2021-06-12 20:30:43,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2021-06-12 20:30:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 8853 transitions. [2021-06-12 20:30:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:30:43,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:43,877 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:44,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-12 20:30:44,097 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:44,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:44,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1049711310, now seen corresponding path program 6 times [2021-06-12 20:30:44,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:44,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020264707] [2021-06-12 20:30:44,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:44,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:44,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020264707] [2021-06-12 20:30:44,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020264707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367337305] [2021-06-12 20:30:44,146 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 [2021-06-12 20:30:44,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 20:30:44,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:44,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:30:44,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:44,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367337305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:44,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:44,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:44,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044059160] [2021-06-12 20:30:44,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:44,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:44,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:44,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:44,263 INFO L87 Difference]: Start difference. First operand 3929 states and 8853 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-12 20:30:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:44,328 INFO L93 Difference]: Finished difference Result 5348 states and 11836 transitions. [2021-06-12 20:30:44,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:30:44,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 31 [2021-06-12 20:30:44,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:44,338 INFO L225 Difference]: With dead ends: 5348 [2021-06-12 20:30:44,338 INFO L226 Difference]: Without dead ends: 5329 [2021-06-12 20:30:44,339 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:44,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-06-12 20:30:44,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4092. [2021-06-12 20:30:44,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.2561720850647764) internal successors, (9230), 4091 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:44,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 9230 transitions. [2021-06-12 20:30:44,450 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 9230 transitions. Word has length 31 [2021-06-12 20:30:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:44,450 INFO L482 AbstractCegarLoop]: Abstraction has 4092 states and 9230 transitions. [2021-06-12 20:30:44,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-12 20:30:44,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 9230 transitions. [2021-06-12 20:30:44,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:30:44,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:44,456 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:44,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:44,673 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:44,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:44,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2056604018, now seen corresponding path program 7 times [2021-06-12 20:30:44,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:44,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840798903] [2021-06-12 20:30:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:44,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:44,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840798903] [2021-06-12 20:30:44,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840798903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:44,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201531303] [2021-06-12 20:30:44,730 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 [2021-06-12 20:30:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:44,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:30:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:44,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201531303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:44,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:44,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:44,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247997081] [2021-06-12 20:30:44,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:44,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:44,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:44,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:44,837 INFO L87 Difference]: Start difference. First operand 4092 states and 9230 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-12 20:30:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:44,907 INFO L93 Difference]: Finished difference Result 5419 states and 11952 transitions. [2021-06-12 20:30:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:30:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 31 [2021-06-12 20:30:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:44,918 INFO L225 Difference]: With dead ends: 5419 [2021-06-12 20:30:44,918 INFO L226 Difference]: Without dead ends: 5400 [2021-06-12 20:30:44,918 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-06-12 20:30:44,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2885. [2021-06-12 20:30:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.235090152565881) internal successors, (6446), 2884 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 6446 transitions. [2021-06-12 20:30:44,984 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 6446 transitions. Word has length 31 [2021-06-12 20:30:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:44,984 INFO L482 AbstractCegarLoop]: Abstraction has 2885 states and 6446 transitions. [2021-06-12 20:30:44,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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) [2021-06-12 20:30:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 6446 transitions. [2021-06-12 20:30:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:44,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:44,989 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:45,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:45,204 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:45,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:45,205 INFO L82 PathProgramCache]: Analyzing trace with hash 467136390, now seen corresponding path program 8 times [2021-06-12 20:30:45,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:45,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111715743] [2021-06-12 20:30:45,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:45,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:45,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111715743] [2021-06-12 20:30:45,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111715743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:45,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943217132] [2021-06-12 20:30:45,245 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 [2021-06-12 20:30:45,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:30:45,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:45,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:45,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:45,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943217132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:45,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:45,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:30:45,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410725622] [2021-06-12 20:30:45,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:30:45,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:45,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:30:45,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:30:45,338 INFO L87 Difference]: Start difference. First operand 2885 states and 6446 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) [2021-06-12 20:30:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:45,449 INFO L93 Difference]: Finished difference Result 5635 states and 12327 transitions. [2021-06-12 20:30:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:45,450 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 36 [2021-06-12 20:30:45,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:45,459 INFO L225 Difference]: With dead ends: 5635 [2021-06-12 20:30:45,460 INFO L226 Difference]: Without dead ends: 5635 [2021-06-12 20:30:45,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:30:45,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-06-12 20:30:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 3879. [2021-06-12 20:30:45,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 2.2439401753481176) internal successors, (8702), 3878 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:45,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8702 transitions. [2021-06-12 20:30:45,551 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8702 transitions. Word has length 36 [2021-06-12 20:30:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:45,552 INFO L482 AbstractCegarLoop]: Abstraction has 3879 states and 8702 transitions. [2021-06-12 20:30:45,552 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) [2021-06-12 20:30:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8702 transitions. [2021-06-12 20:30:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:45,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:45,557 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:45,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 20:30:45,781 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:45,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1694057605, now seen corresponding path program 9 times [2021-06-12 20:30:45,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:45,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178899745] [2021-06-12 20:30:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:45,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:45,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178899745] [2021-06-12 20:30:45,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178899745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:45,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207627337] [2021-06-12 20:30:45,820 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 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 [2021-06-12 20:30:45,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:30:45,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:45,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:45,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:45,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207627337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:45,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:45,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:30:45,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217990064] [2021-06-12 20:30:45,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:30:45,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:45,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:30:45,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:30:45,909 INFO L87 Difference]: Start difference. First operand 3879 states and 8702 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) [2021-06-12 20:30:46,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:46,021 INFO L93 Difference]: Finished difference Result 7170 states and 15945 transitions. [2021-06-12 20:30:46,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:30:46,022 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 36 [2021-06-12 20:30:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:46,032 INFO L225 Difference]: With dead ends: 7170 [2021-06-12 20:30:46,033 INFO L226 Difference]: Without dead ends: 7072 [2021-06-12 20:30:46,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:30:46,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-06-12 20:30:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6656. [2021-06-12 20:30:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 2.251089406461307) internal successors, (14981), 6655 states have internal predecessors, (14981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14981 transitions. [2021-06-12 20:30:46,144 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14981 transitions. Word has length 36 [2021-06-12 20:30:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:46,144 INFO L482 AbstractCegarLoop]: Abstraction has 6656 states and 14981 transitions. [2021-06-12 20:30:46,144 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) [2021-06-12 20:30:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14981 transitions. [2021-06-12 20:30:46,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:46,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:46,152 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:46,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:46,365 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:46,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1866861137, now seen corresponding path program 10 times [2021-06-12 20:30:46,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:46,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678994841] [2021-06-12 20:30:46,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:46,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:46,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678994841] [2021-06-12 20:30:46,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678994841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:46,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043824308] [2021-06-12 20:30:46,394 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 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 [2021-06-12 20:30:46,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:30:46,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:46,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:46,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:46,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043824308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:46,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:46,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:46,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141167066] [2021-06-12 20:30:46,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:46,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:46,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:46,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:46,530 INFO L87 Difference]: Start difference. First operand 6656 states and 14981 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:46,619 INFO L93 Difference]: Finished difference Result 6984 states and 15407 transitions. [2021-06-12 20:30:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:46,620 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-12 20:30:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:46,631 INFO L225 Difference]: With dead ends: 6984 [2021-06-12 20:30:46,631 INFO L226 Difference]: Without dead ends: 6984 [2021-06-12 20:30:46,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:30:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-06-12 20:30:46,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6596. [2021-06-12 20:30:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.234571645185747) internal successors, (14737), 6595 states have internal predecessors, (14737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14737 transitions. [2021-06-12 20:30:46,745 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14737 transitions. Word has length 36 [2021-06-12 20:30:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:46,745 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 14737 transitions. [2021-06-12 20:30:46,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14737 transitions. [2021-06-12 20:30:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:46,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:46,753 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:46,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 20:30:46,977 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1660386298, now seen corresponding path program 11 times [2021-06-12 20:30:46,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:46,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137384378] [2021-06-12 20:30:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:47,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:47,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137384378] [2021-06-12 20:30:47,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137384378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:47,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216478078] [2021-06-12 20:30:47,010 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 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 [2021-06-12 20:30:47,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:30:47,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:47,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:47,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:47,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216478078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:47,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:47,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:47,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786132484] [2021-06-12 20:30:47,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:47,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:47,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:47,101 INFO L87 Difference]: Start difference. First operand 6596 states and 14737 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:47,211 INFO L93 Difference]: Finished difference Result 7018 states and 15447 transitions. [2021-06-12 20:30:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-12 20:30:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:47,219 INFO L225 Difference]: With dead ends: 7018 [2021-06-12 20:30:47,220 INFO L226 Difference]: Without dead ends: 7014 [2021-06-12 20:30:47,220 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:30:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-06-12 20:30:47,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6152. [2021-06-12 20:30:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.238497805234921) internal successors, (13769), 6151 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:47,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 13769 transitions. [2021-06-12 20:30:47,324 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 13769 transitions. Word has length 36 [2021-06-12 20:30:47,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:47,324 INFO L482 AbstractCegarLoop]: Abstraction has 6152 states and 13769 transitions. [2021-06-12 20:30:47,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:47,324 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 13769 transitions. [2021-06-12 20:30:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:47,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:47,332 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:47,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 20:30:47,545 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:47,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:47,545 INFO L82 PathProgramCache]: Analyzing trace with hash -542761274, now seen corresponding path program 12 times [2021-06-12 20:30:47,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:47,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087911879] [2021-06-12 20:30:47,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:47,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:47,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:47,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087911879] [2021-06-12 20:30:47,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087911879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:47,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546939209] [2021-06-12 20:30:47,585 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 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 [2021-06-12 20:30:47,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:30:47,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:47,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:47,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:47,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546939209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:47,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:47,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265196962] [2021-06-12 20:30:47,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:47,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:47,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:47,693 INFO L87 Difference]: Start difference. First operand 6152 states and 13769 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:47,777 INFO L93 Difference]: Finished difference Result 9612 states and 21128 transitions. [2021-06-12 20:30:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-12 20:30:47,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:47,789 INFO L225 Difference]: With dead ends: 9612 [2021-06-12 20:30:47,789 INFO L226 Difference]: Without dead ends: 9612 [2021-06-12 20:30:47,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:30:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-06-12 20:30:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 8560. [2021-06-12 20:30:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8559 states have (on average 2.2475756513611405) internal successors, (19237), 8559 states have internal predecessors, (19237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 19237 transitions. [2021-06-12 20:30:47,972 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 19237 transitions. Word has length 36 [2021-06-12 20:30:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:47,973 INFO L482 AbstractCegarLoop]: Abstraction has 8560 states and 19237 transitions. [2021-06-12 20:30:47,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 19237 transitions. [2021-06-12 20:30:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:47,981 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:47,981 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:48,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 20:30:48,197 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:48,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash 452193595, now seen corresponding path program 13 times [2021-06-12 20:30:48,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:48,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709067218] [2021-06-12 20:30:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:48,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:48,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709067218] [2021-06-12 20:30:48,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709067218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:48,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716628968] [2021-06-12 20:30:48,227 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 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 [2021-06-12 20:30:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:48,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:48,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:48,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716628968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:48,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:48,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:48,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063864662] [2021-06-12 20:30:48,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:48,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:48,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:48,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:48,309 INFO L87 Difference]: Start difference. First operand 8560 states and 19237 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:48,403 INFO L93 Difference]: Finished difference Result 10199 states and 22770 transitions. [2021-06-12 20:30:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:48,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-12 20:30:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:48,415 INFO L225 Difference]: With dead ends: 10199 [2021-06-12 20:30:48,415 INFO L226 Difference]: Without dead ends: 10193 [2021-06-12 20:30:48,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 29.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:30:48,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-06-12 20:30:48,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 9772. [2021-06-12 20:30:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 2.2569849554805037) internal successors, (22053), 9771 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 22053 transitions. [2021-06-12 20:30:48,618 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 22053 transitions. Word has length 36 [2021-06-12 20:30:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:48,618 INFO L482 AbstractCegarLoop]: Abstraction has 9772 states and 22053 transitions. [2021-06-12 20:30:48,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 22053 transitions. [2021-06-12 20:30:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:48,626 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:48,626 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:48,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 20:30:48,841 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash 756919215, now seen corresponding path program 14 times [2021-06-12 20:30:48,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:48,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45678786] [2021-06-12 20:30:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:48,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:48,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45678786] [2021-06-12 20:30:48,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45678786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:48,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919380183] [2021-06-12 20:30:48,871 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 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 [2021-06-12 20:30:48,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:30:48,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:48,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:48,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:49,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919380183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:49,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:49,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:49,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800503763] [2021-06-12 20:30:49,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:49,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:49,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:49,011 INFO L87 Difference]: Start difference. First operand 9772 states and 22053 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:49,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:49,089 INFO L93 Difference]: Finished difference Result 10439 states and 23230 transitions. [2021-06-12 20:30:49,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:49,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-12 20:30:49,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:49,099 INFO L225 Difference]: With dead ends: 10439 [2021-06-12 20:30:49,099 INFO L226 Difference]: Without dead ends: 10437 [2021-06-12 20:30:49,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:30:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-06-12 20:30:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9840. [2021-06-12 20:30:49,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 2.252363045024901) internal successors, (22161), 9839 states have internal predecessors, (22161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 22161 transitions. [2021-06-12 20:30:49,291 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 22161 transitions. Word has length 36 [2021-06-12 20:30:49,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:49,292 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 22161 transitions. [2021-06-12 20:30:49,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:49,292 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 22161 transitions. [2021-06-12 20:30:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:49,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:49,302 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:49,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 20:30:49,505 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:49,505 INFO L82 PathProgramCache]: Analyzing trace with hash 963394054, now seen corresponding path program 15 times [2021-06-12 20:30:49,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:49,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999759389] [2021-06-12 20:30:49,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:49,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:49,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999759389] [2021-06-12 20:30:49,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999759389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:49,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683001070] [2021-06-12 20:30:49,532 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 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 [2021-06-12 20:30:49,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:30:49,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:49,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:30:49,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:30:49,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683001070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:49,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:49,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-06-12 20:30:49,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226715774] [2021-06-12 20:30:49,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:30:49,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:49,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:30:49,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:30:49,729 INFO L87 Difference]: Start difference. First operand 9840 states and 22161 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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) [2021-06-12 20:30:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:50,166 INFO L93 Difference]: Finished difference Result 16933 states and 36602 transitions. [2021-06-12 20:30:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:30:50,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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 36 [2021-06-12 20:30:50,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:50,184 INFO L225 Difference]: With dead ends: 16933 [2021-06-12 20:30:50,184 INFO L226 Difference]: Without dead ends: 16887 [2021-06-12 20:30:50,184 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:30:50,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-06-12 20:30:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 11694. [2021-06-12 20:30:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 11693 states have (on average 2.213033438809544) internal successors, (25877), 11693 states have internal predecessors, (25877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 25877 transitions. [2021-06-12 20:30:50,395 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 25877 transitions. Word has length 36 [2021-06-12 20:30:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:50,395 INFO L482 AbstractCegarLoop]: Abstraction has 11694 states and 25877 transitions. [2021-06-12 20:30:50,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 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) [2021-06-12 20:30:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 25877 transitions. [2021-06-12 20:30:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:50,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:50,403 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:50,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:50,606 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:50,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1147123141, now seen corresponding path program 16 times [2021-06-12 20:30:50,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:50,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897566230] [2021-06-12 20:30:50,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:50,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:50,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897566230] [2021-06-12 20:30:50,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897566230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:50,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655019660] [2021-06-12 20:30:50,637 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 [2021-06-12 20:30:50,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:30:50,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:50,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:50,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:50,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655019660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:50,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:50,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:30:50,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281409096] [2021-06-12 20:30:50,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:30:50,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:50,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:30:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:50,741 INFO L87 Difference]: Start difference. First operand 11694 states and 25877 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) [2021-06-12 20:30:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:50,914 INFO L93 Difference]: Finished difference Result 12577 states and 27332 transitions. [2021-06-12 20:30:50,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:50,914 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 36 [2021-06-12 20:30:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:50,926 INFO L225 Difference]: With dead ends: 12577 [2021-06-12 20:30:50,927 INFO L226 Difference]: Without dead ends: 12575 [2021-06-12 20:30:50,927 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:30:50,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-06-12 20:30:51,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 11238. [2021-06-12 20:30:51,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 11237 states have (on average 2.20352407226128) internal successors, (24761), 11237 states have internal predecessors, (24761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:51,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 24761 transitions. [2021-06-12 20:30:51,074 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 24761 transitions. Word has length 36 [2021-06-12 20:30:51,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:51,074 INFO L482 AbstractCegarLoop]: Abstraction has 11238 states and 24761 transitions. [2021-06-12 20:30:51,074 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) [2021-06-12 20:30:51,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 24761 transitions. [2021-06-12 20:30:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:51,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:51,080 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:51,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 20:30:51,280 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash 973386407, now seen corresponding path program 17 times [2021-06-12 20:30:51,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:51,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513923881] [2021-06-12 20:30:51,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:30:51,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:51,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513923881] [2021-06-12 20:30:51,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513923881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:51,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130970507] [2021-06-12 20:30:51,327 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 [2021-06-12 20:30:51,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 20:30:51,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:51,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:51,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:30:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130970507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:51,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:51,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:30:51,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144259249] [2021-06-12 20:30:51,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:30:51,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:30:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:51,462 INFO L87 Difference]: Start difference. First operand 11238 states and 24761 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) [2021-06-12 20:30:51,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:51,573 INFO L93 Difference]: Finished difference Result 11745 states and 25558 transitions. [2021-06-12 20:30:51,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:30:51,573 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 36 [2021-06-12 20:30:51,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:51,583 INFO L225 Difference]: With dead ends: 11745 [2021-06-12 20:30:51,583 INFO L226 Difference]: Without dead ends: 11709 [2021-06-12 20:30:51,584 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:30:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-06-12 20:30:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11232. [2021-06-12 20:30:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 2.19740005342356) internal successors, (24679), 11231 states have internal predecessors, (24679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 24679 transitions. [2021-06-12 20:30:51,708 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 24679 transitions. Word has length 36 [2021-06-12 20:30:51,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:51,709 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 24679 transitions. [2021-06-12 20:30:51,709 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) [2021-06-12 20:30:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 24679 transitions. [2021-06-12 20:30:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:51,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:51,715 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:51,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:51,924 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:51,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1610257349, now seen corresponding path program 18 times [2021-06-12 20:30:51,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:51,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366326514] [2021-06-12 20:30:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:51,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:51,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366326514] [2021-06-12 20:30:51,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366326514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:51,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249869334] [2021-06-12 20:30:51,949 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 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 [2021-06-12 20:30:51,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:30:51,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:52,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249869334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:52,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:52,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:52,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454928238] [2021-06-12 20:30:52,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:52,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:52,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:52,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:52,115 INFO L87 Difference]: Start difference. First operand 11232 states and 24679 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:52,208 INFO L93 Difference]: Finished difference Result 13428 states and 29318 transitions. [2021-06-12 20:30:52,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:52,208 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-12 20:30:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:52,221 INFO L225 Difference]: With dead ends: 13428 [2021-06-12 20:30:52,222 INFO L226 Difference]: Without dead ends: 13422 [2021-06-12 20:30:52,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:30:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2021-06-12 20:30:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 12944. [2021-06-12 20:30:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12944 states, 12943 states have (on average 2.2074480414123463) internal successors, (28571), 12943 states have internal predecessors, (28571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 28571 transitions. [2021-06-12 20:30:52,399 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 28571 transitions. Word has length 36 [2021-06-12 20:30:52,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:52,399 INFO L482 AbstractCegarLoop]: Abstraction has 12944 states and 28571 transitions. [2021-06-12 20:30:52,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:52,399 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 28571 transitions. [2021-06-12 20:30:52,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:52,405 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:52,405 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:52,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 20:30:52,609 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:52,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1305531729, now seen corresponding path program 19 times [2021-06-12 20:30:52,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:52,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312197644] [2021-06-12 20:30:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:52,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:52,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312197644] [2021-06-12 20:30:52,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312197644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:52,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562092211] [2021-06-12 20:30:52,635 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 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 [2021-06-12 20:30:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:52,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:52,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:52,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562092211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:52,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:52,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 20:30:52,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018785666] [2021-06-12 20:30:52,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:30:52,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:30:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:30:52,751 INFO L87 Difference]: Start difference. First operand 12944 states and 28571 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:52,855 INFO L93 Difference]: Finished difference Result 13864 states and 30236 transitions. [2021-06-12 20:30:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:52,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-06-12 20:30:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:52,874 INFO L225 Difference]: With dead ends: 13864 [2021-06-12 20:30:52,874 INFO L226 Difference]: Without dead ends: 13864 [2021-06-12 20:30:52,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:30:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-06-12 20:30:53,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 12976. [2021-06-12 20:30:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12976 states, 12975 states have (on average 2.206936416184971) internal successors, (28635), 12975 states have internal predecessors, (28635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12976 states to 12976 states and 28635 transitions. [2021-06-12 20:30:53,072 INFO L78 Accepts]: Start accepts. Automaton has 12976 states and 28635 transitions. Word has length 36 [2021-06-12 20:30:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:53,073 INFO L482 AbstractCegarLoop]: Abstraction has 12976 states and 28635 transitions. [2021-06-12 20:30:53,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-06-12 20:30:53,073 INFO L276 IsEmpty]: Start isEmpty. Operand 12976 states and 28635 transitions. [2021-06-12 20:30:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:53,078 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:53,078 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:53,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:53,278 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:53,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:53,278 INFO L82 PathProgramCache]: Analyzing trace with hash -915327803, now seen corresponding path program 20 times [2021-06-12 20:30:53,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:53,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819250802] [2021-06-12 20:30:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:53,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:53,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819250802] [2021-06-12 20:30:53,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819250802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:53,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521335066] [2021-06-12 20:30:53,307 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 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 [2021-06-12 20:30:53,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:30:53,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:53,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:53,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:53,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521335066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:53,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:53,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:30:53,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894889200] [2021-06-12 20:30:53,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:30:53,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:53,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:30:53,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:53,387 INFO L87 Difference]: Start difference. First operand 12976 states and 28635 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) [2021-06-12 20:30:53,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:53,512 INFO L93 Difference]: Finished difference Result 14564 states and 31706 transitions. [2021-06-12 20:30:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:30:53,512 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 36 [2021-06-12 20:30:53,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:53,526 INFO L225 Difference]: With dead ends: 14564 [2021-06-12 20:30:53,526 INFO L226 Difference]: Without dead ends: 14564 [2021-06-12 20:30:53,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:30:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-06-12 20:30:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13136. [2021-06-12 20:30:53,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13135 states have (on average 2.204415683288923) internal successors, (28955), 13135 states have internal predecessors, (28955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 28955 transitions. [2021-06-12 20:30:53,673 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 28955 transitions. Word has length 36 [2021-06-12 20:30:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:53,673 INFO L482 AbstractCegarLoop]: Abstraction has 13136 states and 28955 transitions. [2021-06-12 20:30:53,673 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) [2021-06-12 20:30:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 28955 transitions. [2021-06-12 20:30:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:30:53,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:53,679 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:53,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 20:30:53,879 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:53,879 INFO L82 PathProgramCache]: Analyzing trace with hash 537537127, now seen corresponding path program 21 times [2021-06-12 20:30:53,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:53,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866099619] [2021-06-12 20:30:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:53,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:53,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866099619] [2021-06-12 20:30:53,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866099619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661576652] [2021-06-12 20:30:53,918 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 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 [2021-06-12 20:30:53,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:30:53,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:53,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:30:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:54,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661576652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:54,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:54,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:30:54,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544352650] [2021-06-12 20:30:54,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:30:54,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:54,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:30:54,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:30:54,027 INFO L87 Difference]: Start difference. First operand 13136 states and 28955 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) [2021-06-12 20:30:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:54,173 INFO L93 Difference]: Finished difference Result 14130 states and 30823 transitions. [2021-06-12 20:30:54,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:54,174 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 36 [2021-06-12 20:30:54,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:54,192 INFO L225 Difference]: With dead ends: 14130 [2021-06-12 20:30:54,192 INFO L226 Difference]: Without dead ends: 14130 [2021-06-12 20:30:54,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:30:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2021-06-12 20:30:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 12516. [2021-06-12 20:30:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12516 states, 12515 states have (on average 2.204314822213344) internal successors, (27587), 12515 states have internal predecessors, (27587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 27587 transitions. [2021-06-12 20:30:54,366 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 27587 transitions. Word has length 36 [2021-06-12 20:30:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:54,366 INFO L482 AbstractCegarLoop]: Abstraction has 12516 states and 27587 transitions. [2021-06-12 20:30:54,367 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) [2021-06-12 20:30:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 27587 transitions. [2021-06-12 20:30:54,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:30:54,375 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:54,375 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:54,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:54,577 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:54,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:54,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1450078555, now seen corresponding path program 22 times [2021-06-12 20:30:54,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:54,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505248944] [2021-06-12 20:30:54,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:54,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:54,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505248944] [2021-06-12 20:30:54,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505248944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:54,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897448079] [2021-06-12 20:30:54,631 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 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 [2021-06-12 20:30:54,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:30:54,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:54,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:30:54,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:54,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897448079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:54,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:54,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:30:54,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073823451] [2021-06-12 20:30:54,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:30:54,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:54,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:30:54,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:30:54,735 INFO L87 Difference]: Start difference. First operand 12516 states and 27587 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) [2021-06-12 20:30:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:54,941 INFO L93 Difference]: Finished difference Result 15926 states and 34731 transitions. [2021-06-12 20:30:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:30:54,941 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 46 [2021-06-12 20:30:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:54,955 INFO L225 Difference]: With dead ends: 15926 [2021-06-12 20:30:54,956 INFO L226 Difference]: Without dead ends: 15926 [2021-06-12 20:30:54,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:30:54,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2021-06-12 20:30:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 13120. [2021-06-12 20:30:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 13119 states have (on average 2.2095434103209084) internal successors, (28987), 13119 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 28987 transitions. [2021-06-12 20:30:55,103 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 28987 transitions. Word has length 46 [2021-06-12 20:30:55,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:55,103 INFO L482 AbstractCegarLoop]: Abstraction has 13120 states and 28987 transitions. [2021-06-12 20:30:55,103 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) [2021-06-12 20:30:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 28987 transitions. [2021-06-12 20:30:55,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:30:55,113 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:55,114 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:55,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 20:30:55,329 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:55,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1917671971, now seen corresponding path program 23 times [2021-06-12 20:30:55,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:55,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22969436] [2021-06-12 20:30:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:55,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22969436] [2021-06-12 20:30:55,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22969436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:55,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230642006] [2021-06-12 20:30:55,363 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 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 [2021-06-12 20:30:55,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:30:55,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:55,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:30:55,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:55,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230642006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:55,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:55,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:30:55,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529443667] [2021-06-12 20:30:55,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:30:55,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:30:55,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:55,489 INFO L87 Difference]: Start difference. First operand 13120 states and 28987 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:30:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:55,607 INFO L93 Difference]: Finished difference Result 13630 states and 29839 transitions. [2021-06-12 20:30:55,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:30:55,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-06-12 20:30:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:55,625 INFO L225 Difference]: With dead ends: 13630 [2021-06-12 20:30:55,625 INFO L226 Difference]: Without dead ends: 13622 [2021-06-12 20:30:55,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:30:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-06-12 20:30:55,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13056. [2021-06-12 20:30:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13055 states have (on average 2.2050555342780545) internal successors, (28787), 13055 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 28787 transitions. [2021-06-12 20:30:55,766 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 28787 transitions. Word has length 46 [2021-06-12 20:30:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:55,766 INFO L482 AbstractCegarLoop]: Abstraction has 13056 states and 28787 transitions. [2021-06-12 20:30:55,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:30:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 28787 transitions. [2021-06-12 20:30:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:30:55,777 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:55,777 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:55,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:55,993 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash -613294009, now seen corresponding path program 24 times [2021-06-12 20:30:55,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:55,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295703434] [2021-06-12 20:30:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:56,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295703434] [2021-06-12 20:30:56,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295703434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403256123] [2021-06-12 20:30:56,024 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 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 [2021-06-12 20:30:56,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:30:56,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:56,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:30:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:56,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403256123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:56,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:56,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:30:56,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948184248] [2021-06-12 20:30:56,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:30:56,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:56,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:30:56,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:56,128 INFO L87 Difference]: Start difference. First operand 13056 states and 28787 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:30:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:56,232 INFO L93 Difference]: Finished difference Result 17393 states and 37929 transitions. [2021-06-12 20:30:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:30:56,233 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-06-12 20:30:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:56,248 INFO L225 Difference]: With dead ends: 17393 [2021-06-12 20:30:56,249 INFO L226 Difference]: Without dead ends: 17393 [2021-06-12 20:30:56,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:30:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-06-12 20:30:56,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15686. [2021-06-12 20:30:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15686 states, 15685 states have (on average 2.224099458080969) internal successors, (34885), 15685 states have internal predecessors, (34885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15686 states to 15686 states and 34885 transitions. [2021-06-12 20:30:56,463 INFO L78 Accepts]: Start accepts. Automaton has 15686 states and 34885 transitions. Word has length 46 [2021-06-12 20:30:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:56,463 INFO L482 AbstractCegarLoop]: Abstraction has 15686 states and 34885 transitions. [2021-06-12 20:30:56,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:30:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 15686 states and 34885 transitions. [2021-06-12 20:30:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:30:56,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:56,473 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:56,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 20:30:56,673 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash 556761991, now seen corresponding path program 25 times [2021-06-12 20:30:56,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:56,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418751714] [2021-06-12 20:30:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:56,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:56,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418751714] [2021-06-12 20:30:56,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418751714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:56,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949750139] [2021-06-12 20:30:56,703 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 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 [2021-06-12 20:30:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:56,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:30:56,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:56,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949750139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:56,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:56,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:30:56,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959892633] [2021-06-12 20:30:56,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:30:56,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:56,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:30:56,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:56,807 INFO L87 Difference]: Start difference. First operand 15686 states and 34885 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:30:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:56,937 INFO L93 Difference]: Finished difference Result 16911 states and 36914 transitions. [2021-06-12 20:30:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:30:56,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-06-12 20:30:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:56,953 INFO L225 Difference]: With dead ends: 16911 [2021-06-12 20:30:56,953 INFO L226 Difference]: Without dead ends: 16863 [2021-06-12 20:30:56,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:30:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-06-12 20:30:57,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 14310. [2021-06-12 20:30:57,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14310 states, 14309 states have (on average 2.212104270039835) internal successors, (31653), 14309 states have internal predecessors, (31653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 31653 transitions. [2021-06-12 20:30:57,108 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 31653 transitions. Word has length 46 [2021-06-12 20:30:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:57,108 INFO L482 AbstractCegarLoop]: Abstraction has 14310 states and 31653 transitions. [2021-06-12 20:30:57,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:30:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 31653 transitions. [2021-06-12 20:30:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:30:57,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:57,125 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:57,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 20:30:57,326 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:57,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1979977875, now seen corresponding path program 26 times [2021-06-12 20:30:57,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:57,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158954854] [2021-06-12 20:30:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:57,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:57,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158954854] [2021-06-12 20:30:57,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158954854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:57,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687328418] [2021-06-12 20:30:57,361 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 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 [2021-06-12 20:30:57,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:30:57,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:30:57,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:30:57,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687328418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:57,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:57,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:30:57,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025533974] [2021-06-12 20:30:57,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:30:57,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:57,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:30:57,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:30:57,460 INFO L87 Difference]: Start difference. First operand 14310 states and 31653 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-06-12 20:30:57,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:57,609 INFO L93 Difference]: Finished difference Result 15209 states and 33173 transitions. [2021-06-12 20:30:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:30:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 46 [2021-06-12 20:30:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:57,629 INFO L225 Difference]: With dead ends: 15209 [2021-06-12 20:30:57,630 INFO L226 Difference]: Without dead ends: 15137 [2021-06-12 20:30:57,630 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:30:57,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15137 states. [2021-06-12 20:30:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15137 to 14314. [2021-06-12 20:30:57,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14314 states, 14313 states have (on average 2.2051980716830855) internal successors, (31563), 14313 states have internal predecessors, (31563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14314 states to 14314 states and 31563 transitions. [2021-06-12 20:30:57,842 INFO L78 Accepts]: Start accepts. Automaton has 14314 states and 31563 transitions. Word has length 46 [2021-06-12 20:30:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:57,842 INFO L482 AbstractCegarLoop]: Abstraction has 14314 states and 31563 transitions. [2021-06-12 20:30:57,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-06-12 20:30:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 14314 states and 31563 transitions. [2021-06-12 20:30:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:30:57,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:57,854 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:58,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 20:30:58,069 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:58,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:58,069 INFO L82 PathProgramCache]: Analyzing trace with hash 443374363, now seen corresponding path program 27 times [2021-06-12 20:30:58,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:58,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592510435] [2021-06-12 20:30:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:58,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:30:58,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:58,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592510435] [2021-06-12 20:30:58,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592510435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:58,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2516478] [2021-06-12 20:30:58,104 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 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 [2021-06-12 20:30:58,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:30:58,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:30:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:30:58,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2516478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:58,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:58,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:30:58,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250482467] [2021-06-12 20:30:58,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:30:58,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:58,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:30:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:58,320 INFO L87 Difference]: Start difference. First operand 14314 states and 31563 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-06-12 20:30:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:58,452 INFO L93 Difference]: Finished difference Result 18333 states and 40131 transitions. [2021-06-12 20:30:58,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 20:30:58,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 46 [2021-06-12 20:30:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:58,478 INFO L225 Difference]: With dead ends: 18333 [2021-06-12 20:30:58,479 INFO L226 Difference]: Without dead ends: 18330 [2021-06-12 20:30:58,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:30:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18330 states. [2021-06-12 20:30:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18330 to 15498. [2021-06-12 20:30:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 15497 states have (on average 2.2112021681615794) internal successors, (34267), 15497 states have internal predecessors, (34267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 34267 transitions. [2021-06-12 20:30:58,766 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 34267 transitions. Word has length 46 [2021-06-12 20:30:58,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:58,766 INFO L482 AbstractCegarLoop]: Abstraction has 15498 states and 34267 transitions. [2021-06-12 20:30:58,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-06-12 20:30:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 34267 transitions. [2021-06-12 20:30:58,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:30:58,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:58,779 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:59,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 20:30:59,003 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:59,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:59,003 INFO L82 PathProgramCache]: Analyzing trace with hash 729697573, now seen corresponding path program 28 times [2021-06-12 20:30:59,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:59,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427913997] [2021-06-12 20:30:59,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:59,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:59,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427913997] [2021-06-12 20:30:59,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427913997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:59,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245558148] [2021-06-12 20:30:59,045 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 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 [2021-06-12 20:30:59,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:30:59,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:30:59,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:30:59,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:30:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:59,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245558148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:59,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:30:59,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:30:59,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142374509] [2021-06-12 20:30:59,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:30:59,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:30:59,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:30:59,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:30:59,185 INFO L87 Difference]: Start difference. First operand 15498 states and 34267 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:30:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:30:59,333 INFO L93 Difference]: Finished difference Result 20808 states and 45501 transitions. [2021-06-12 20:30:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:30:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-06-12 20:30:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:30:59,361 INFO L225 Difference]: With dead ends: 20808 [2021-06-12 20:30:59,362 INFO L226 Difference]: Without dead ends: 20808 [2021-06-12 20:30:59,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:30:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20808 states. [2021-06-12 20:30:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20808 to 19050. [2021-06-12 20:30:59,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19050 states, 19049 states have (on average 2.2252611685652792) internal successors, (42389), 19049 states have internal predecessors, (42389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:30:59,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19050 states to 19050 states and 42389 transitions. [2021-06-12 20:30:59,701 INFO L78 Accepts]: Start accepts. Automaton has 19050 states and 42389 transitions. Word has length 46 [2021-06-12 20:30:59,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:30:59,702 INFO L482 AbstractCegarLoop]: Abstraction has 19050 states and 42389 transitions. [2021-06-12 20:30:59,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:30:59,702 INFO L276 IsEmpty]: Start isEmpty. Operand 19050 states and 42389 transitions. [2021-06-12 20:30:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:30:59,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:30:59,719 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:30:59,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:30:59,943 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:30:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:30:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1899753573, now seen corresponding path program 29 times [2021-06-12 20:30:59,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:30:59,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737612487] [2021-06-12 20:30:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:30:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:30:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:30:59,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:30:59,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737612487] [2021-06-12 20:30:59,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737612487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:30:59,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072157610] [2021-06-12 20:30:59,982 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 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 [2021-06-12 20:31:00,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:31:00,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:31:00,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:00,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072157610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:00,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:00,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:31:00,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051603617] [2021-06-12 20:31:00,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:31:00,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:00,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:31:00,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:31:00,112 INFO L87 Difference]: Start difference. First operand 19050 states and 42389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:31:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:00,242 INFO L93 Difference]: Finished difference Result 20381 states and 44592 transitions. [2021-06-12 20:31:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:31:00,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-06-12 20:31:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:00,264 INFO L225 Difference]: With dead ends: 20381 [2021-06-12 20:31:00,264 INFO L226 Difference]: Without dead ends: 20349 [2021-06-12 20:31:00,264 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:31:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-06-12 20:31:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 19030. [2021-06-12 20:31:00,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.2227652530348414) internal successors, (42297), 19029 states have internal predecessors, (42297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42297 transitions. [2021-06-12 20:31:00,529 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42297 transitions. Word has length 46 [2021-06-12 20:31:00,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:00,530 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42297 transitions. [2021-06-12 20:31:00,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:31:00,530 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42297 transitions. [2021-06-12 20:31:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:31:00,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:00,541 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:00,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-12 20:31:00,742 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:00,744 INFO L82 PathProgramCache]: Analyzing trace with hash -636986293, now seen corresponding path program 30 times [2021-06-12 20:31:00,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:00,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410586074] [2021-06-12 20:31:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:00,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410586074] [2021-06-12 20:31:00,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410586074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:00,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902487767] [2021-06-12 20:31:00,794 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 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 [2021-06-12 20:31:00,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:31:00,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:00,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:31:00,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:00,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902487767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:00,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:00,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:00,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257701734] [2021-06-12 20:31:00,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:00,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:00,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:00,891 INFO L87 Difference]: Start difference. First operand 19030 states and 42297 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-06-12 20:31:01,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:01,042 INFO L93 Difference]: Finished difference Result 20409 states and 44584 transitions. [2021-06-12 20:31:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:31:01,043 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 46 [2021-06-12 20:31:01,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:01,069 INFO L225 Difference]: With dead ends: 20409 [2021-06-12 20:31:01,069 INFO L226 Difference]: Without dead ends: 20337 [2021-06-12 20:31:01,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:01,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20337 states. [2021-06-12 20:31:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20337 to 19030. [2021-06-12 20:31:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.216459088759262) internal successors, (42177), 19029 states have internal predecessors, (42177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42177 transitions. [2021-06-12 20:31:01,425 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42177 transitions. Word has length 46 [2021-06-12 20:31:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:01,426 INFO L482 AbstractCegarLoop]: Abstraction has 19030 states and 42177 transitions. [2021-06-12 20:31:01,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-06-12 20:31:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42177 transitions. [2021-06-12 20:31:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:31:01,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:01,443 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:01,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 20:31:01,666 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:01,666 INFO L82 PathProgramCache]: Analyzing trace with hash 725045157, now seen corresponding path program 31 times [2021-06-12 20:31:01,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:01,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546442530] [2021-06-12 20:31:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:01,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546442530] [2021-06-12 20:31:01,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546442530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:01,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373668494] [2021-06-12 20:31:01,716 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 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 [2021-06-12 20:31:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:31:01,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:01,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373668494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:01,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:01,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:01,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008876607] [2021-06-12 20:31:01,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:01,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:01,815 INFO L87 Difference]: Start difference. First operand 19030 states and 42177 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) [2021-06-12 20:31:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:01,983 INFO L93 Difference]: Finished difference Result 20155 states and 44063 transitions. [2021-06-12 20:31:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:01,983 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 46 [2021-06-12 20:31:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:02,009 INFO L225 Difference]: With dead ends: 20155 [2021-06-12 20:31:02,010 INFO L226 Difference]: Without dead ends: 20027 [2021-06-12 20:31:02,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:02,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-06-12 20:31:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 19078. [2021-06-12 20:31:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 2.210043507889081) internal successors, (42161), 19077 states have internal predecessors, (42161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:02,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 42161 transitions. [2021-06-12 20:31:02,296 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 42161 transitions. Word has length 46 [2021-06-12 20:31:02,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:02,296 INFO L482 AbstractCegarLoop]: Abstraction has 19078 states and 42161 transitions. [2021-06-12 20:31:02,296 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) [2021-06-12 20:31:02,296 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 42161 transitions. [2021-06-12 20:31:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:31:02,308 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:02,308 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:02,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:02,508 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:02,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash -876630137, now seen corresponding path program 32 times [2021-06-12 20:31:02,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:02,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4206137] [2021-06-12 20:31:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:02,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:02,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4206137] [2021-06-12 20:31:02,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4206137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:02,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031237760] [2021-06-12 20:31:02,551 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 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 [2021-06-12 20:31:02,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:02,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:02,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:31:02,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:02,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031237760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:02,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:02,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506094248] [2021-06-12 20:31:02,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:02,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:02,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:02,655 INFO L87 Difference]: Start difference. First operand 19078 states and 42161 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-06-12 20:31:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:02,822 INFO L93 Difference]: Finished difference Result 20680 states and 45191 transitions. [2021-06-12 20:31:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:31:02,822 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 46 [2021-06-12 20:31:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:02,847 INFO L225 Difference]: With dead ends: 20680 [2021-06-12 20:31:02,847 INFO L226 Difference]: Without dead ends: 20680 [2021-06-12 20:31:02,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:02,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-06-12 20:31:03,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 17730. [2021-06-12 20:31:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17729 states have (on average 2.2009701618816626) internal successors, (39021), 17729 states have internal predecessors, (39021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:03,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 39021 transitions. [2021-06-12 20:31:03,065 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 39021 transitions. Word has length 46 [2021-06-12 20:31:03,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:03,065 INFO L482 AbstractCegarLoop]: Abstraction has 17730 states and 39021 transitions. [2021-06-12 20:31:03,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-06-12 20:31:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 39021 transitions. [2021-06-12 20:31:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:31:03,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:03,076 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:03,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 20:31:03,278 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:03,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1293149669, now seen corresponding path program 33 times [2021-06-12 20:31:03,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:03,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700568950] [2021-06-12 20:31:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:03,311 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:31:03,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:03,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700568950] [2021-06-12 20:31:03,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700568950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:03,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814371178] [2021-06-12 20:31:03,312 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 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 [2021-06-12 20:31:03,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:31:03,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:03,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:31:03,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:31:03,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814371178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:03,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:03,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:03,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807566760] [2021-06-12 20:31:03,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:03,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:03,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:03,409 INFO L87 Difference]: Start difference. First operand 17730 states and 39021 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) [2021-06-12 20:31:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:03,526 INFO L93 Difference]: Finished difference Result 19104 states and 41588 transitions. [2021-06-12 20:31:03,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:31:03,527 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 46 [2021-06-12 20:31:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:03,545 INFO L225 Difference]: With dead ends: 19104 [2021-06-12 20:31:03,545 INFO L226 Difference]: Without dead ends: 19104 [2021-06-12 20:31:03,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19104 states. [2021-06-12 20:31:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19104 to 17742. [2021-06-12 20:31:03,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17742 states, 17741 states have (on average 2.200834225804633) internal successors, (39045), 17741 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 39045 transitions. [2021-06-12 20:31:03,742 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 39045 transitions. Word has length 46 [2021-06-12 20:31:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:03,742 INFO L482 AbstractCegarLoop]: Abstraction has 17742 states and 39045 transitions. [2021-06-12 20:31:03,742 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) [2021-06-12 20:31:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 39045 transitions. [2021-06-12 20:31:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:31:03,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:03,753 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:03,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:03,954 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:03,954 INFO L82 PathProgramCache]: Analyzing trace with hash -731848889, now seen corresponding path program 34 times [2021-06-12 20:31:03,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:03,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179263691] [2021-06-12 20:31:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:03,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:03,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179263691] [2021-06-12 20:31:03,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179263691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:03,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43445479] [2021-06-12 20:31:03,981 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 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 [2021-06-12 20:31:04,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:04,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:04,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:31:04,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:04,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43445479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:04,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:04,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:31:04,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523227272] [2021-06-12 20:31:04,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:31:04,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:04,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:31:04,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:31:04,101 INFO L87 Difference]: Start difference. First operand 17742 states and 39045 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:31:04,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:04,262 INFO L93 Difference]: Finished difference Result 21829 states and 47682 transitions. [2021-06-12 20:31:04,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:31:04,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-06-12 20:31:04,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:04,279 INFO L225 Difference]: With dead ends: 21829 [2021-06-12 20:31:04,279 INFO L226 Difference]: Without dead ends: 21829 [2021-06-12 20:31:04,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:31:04,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21829 states. [2021-06-12 20:31:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21829 to 20406. [2021-06-12 20:31:04,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 2.2182308257779955) internal successors, (45263), 20405 states have internal predecessors, (45263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 45263 transitions. [2021-06-12 20:31:04,490 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 45263 transitions. Word has length 46 [2021-06-12 20:31:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:04,490 INFO L482 AbstractCegarLoop]: Abstraction has 20406 states and 45263 transitions. [2021-06-12 20:31:04,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:31:04,490 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 45263 transitions. [2021-06-12 20:31:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:31:04,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:04,503 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:04,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 20:31:04,703 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:04,703 INFO L82 PathProgramCache]: Analyzing trace with hash 438207111, now seen corresponding path program 35 times [2021-06-12 20:31:04,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:04,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142520374] [2021-06-12 20:31:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:04,738 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:04,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:04,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142520374] [2021-06-12 20:31:04,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142520374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:04,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360665228] [2021-06-12 20:31:04,738 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:04,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:31:04,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:04,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:31:04,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:04,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360665228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:04,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:04,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:31:04,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684798246] [2021-06-12 20:31:04,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:31:04,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:04,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:31:04,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:31:04,822 INFO L87 Difference]: Start difference. First operand 20406 states and 45263 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:31:04,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:04,942 INFO L93 Difference]: Finished difference Result 21712 states and 47427 transitions. [2021-06-12 20:31:04,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:31:04,942 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-06-12 20:31:04,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:04,962 INFO L225 Difference]: With dead ends: 21712 [2021-06-12 20:31:04,963 INFO L226 Difference]: Without dead ends: 21704 [2021-06-12 20:31:04,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:31:04,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21704 states. [2021-06-12 20:31:05,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21704 to 20402. [2021-06-12 20:31:05,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.21768540757806) internal successors, (45243), 20401 states have internal predecessors, (45243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45243 transitions. [2021-06-12 20:31:05,187 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45243 transitions. Word has length 46 [2021-06-12 20:31:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:05,187 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45243 transitions. [2021-06-12 20:31:05,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-06-12 20:31:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45243 transitions. [2021-06-12 20:31:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-12 20:31:05,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:05,199 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:05,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:05,400 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2098532755, now seen corresponding path program 36 times [2021-06-12 20:31:05,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:05,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162529326] [2021-06-12 20:31:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:05,438 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:05,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:05,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162529326] [2021-06-12 20:31:05,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162529326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:05,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580015317] [2021-06-12 20:31:05,439 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 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 [2021-06-12 20:31:05,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:31:05,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:05,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:31:05,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:31:05,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580015317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:05,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:05,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-12 20:31:05,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047659385] [2021-06-12 20:31:05,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:31:05,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:05,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:31:05,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:05,566 INFO L87 Difference]: Start difference. First operand 20402 states and 45243 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 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) [2021-06-12 20:31:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:06,052 INFO L93 Difference]: Finished difference Result 28400 states and 61628 transitions. [2021-06-12 20:31:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:31:06,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 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 46 [2021-06-12 20:31:06,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:06,082 INFO L225 Difference]: With dead ends: 28400 [2021-06-12 20:31:06,083 INFO L226 Difference]: Without dead ends: 28376 [2021-06-12 20:31:06,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:31:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28376 states. [2021-06-12 20:31:06,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28376 to 20402. [2021-06-12 20:31:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.212979755894319) internal successors, (45147), 20401 states have internal predecessors, (45147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45147 transitions. [2021-06-12 20:31:06,330 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45147 transitions. Word has length 46 [2021-06-12 20:31:06,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:06,330 INFO L482 AbstractCegarLoop]: Abstraction has 20402 states and 45147 transitions. [2021-06-12 20:31:06,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 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) [2021-06-12 20:31:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45147 transitions. [2021-06-12 20:31:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:06,348 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:06,348 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:06,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 20:31:06,561 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:06,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:06,561 INFO L82 PathProgramCache]: Analyzing trace with hash -676350810, now seen corresponding path program 37 times [2021-06-12 20:31:06,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:06,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457426728] [2021-06-12 20:31:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:06,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:06,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457426728] [2021-06-12 20:31:06,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457426728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:06,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754545096] [2021-06-12 20:31:06,632 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 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 [2021-06-12 20:31:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:06,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:06,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:06,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754545096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:06,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:06,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:31:06,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351905528] [2021-06-12 20:31:06,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:31:06,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:06,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:31:06,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:31:06,766 INFO L87 Difference]: Start difference. First operand 20402 states and 45147 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) [2021-06-12 20:31:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:07,079 INFO L93 Difference]: Finished difference Result 25889 states and 56595 transitions. [2021-06-12 20:31:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:07,080 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 56 [2021-06-12 20:31:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:07,117 INFO L225 Difference]: With dead ends: 25889 [2021-06-12 20:31:07,118 INFO L226 Difference]: Without dead ends: 25889 [2021-06-12 20:31:07,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:31:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2021-06-12 20:31:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 21836. [2021-06-12 20:31:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21836 states, 21835 states have (on average 2.216762079230593) internal successors, (48403), 21835 states have internal predecessors, (48403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 48403 transitions. [2021-06-12 20:31:07,441 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 48403 transitions. Word has length 56 [2021-06-12 20:31:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:07,441 INFO L482 AbstractCegarLoop]: Abstraction has 21836 states and 48403 transitions. [2021-06-12 20:31:07,441 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) [2021-06-12 20:31:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 48403 transitions. [2021-06-12 20:31:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:07,460 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:07,460 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:07,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 20:31:07,661 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:07,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1178558949, now seen corresponding path program 38 times [2021-06-12 20:31:07,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:07,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291913571] [2021-06-12 20:31:07,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:07,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:07,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291913571] [2021-06-12 20:31:07,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291913571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:07,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244216270] [2021-06-12 20:31:07,728 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 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 [2021-06-12 20:31:07,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:07,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:07,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:07,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:07,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244216270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:07,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:07,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:31:07,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024703963] [2021-06-12 20:31:07,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:31:07,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:07,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:31:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:31:07,861 INFO L87 Difference]: Start difference. First operand 21836 states and 48403 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) [2021-06-12 20:31:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:08,082 INFO L93 Difference]: Finished difference Result 31481 states and 69778 transitions. [2021-06-12 20:31:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:31:08,082 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 56 [2021-06-12 20:31:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:08,116 INFO L225 Difference]: With dead ends: 31481 [2021-06-12 20:31:08,116 INFO L226 Difference]: Without dead ends: 31323 [2021-06-12 20:31:08,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:31:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-06-12 20:31:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 30212. [2021-06-12 20:31:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 30211 states have (on average 2.2320015888252622) internal successors, (67431), 30211 states have internal predecessors, (67431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:08,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 67431 transitions. [2021-06-12 20:31:08,548 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 67431 transitions. Word has length 56 [2021-06-12 20:31:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:08,548 INFO L482 AbstractCegarLoop]: Abstraction has 30212 states and 67431 transitions. [2021-06-12 20:31:08,548 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) [2021-06-12 20:31:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 67431 transitions. [2021-06-12 20:31:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:08,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:08,571 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:08,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:08,772 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:08,772 INFO L82 PathProgramCache]: Analyzing trace with hash 153461775, now seen corresponding path program 39 times [2021-06-12 20:31:08,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:08,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582431439] [2021-06-12 20:31:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:08,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:08,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582431439] [2021-06-12 20:31:08,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582431439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:08,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637553196] [2021-06-12 20:31:08,810 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 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 [2021-06-12 20:31:08,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:31:08,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:08,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:08,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:08,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637553196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:08,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:08,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:08,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69247800] [2021-06-12 20:31:08,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:08,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:08,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:08,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:08,932 INFO L87 Difference]: Start difference. First operand 30212 states and 67431 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:09,096 INFO L93 Difference]: Finished difference Result 31139 states and 68850 transitions. [2021-06-12 20:31:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:09,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:09,132 INFO L225 Difference]: With dead ends: 31139 [2021-06-12 20:31:09,132 INFO L226 Difference]: Without dead ends: 31139 [2021-06-12 20:31:09,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31139 states. [2021-06-12 20:31:09,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31139 to 28244. [2021-06-12 20:31:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 2.2232411571008743) internal successors, (62791), 28243 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 62791 transitions. [2021-06-12 20:31:09,588 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 62791 transitions. Word has length 56 [2021-06-12 20:31:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:09,589 INFO L482 AbstractCegarLoop]: Abstraction has 28244 states and 62791 transitions. [2021-06-12 20:31:09,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 62791 transitions. [2021-06-12 20:31:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:09,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:09,611 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:09,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 20:31:09,812 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:09,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:09,812 INFO L82 PathProgramCache]: Analyzing trace with hash 359936614, now seen corresponding path program 40 times [2021-06-12 20:31:09,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:09,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866392507] [2021-06-12 20:31:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:09,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:09,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866392507] [2021-06-12 20:31:09,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866392507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:09,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276341193] [2021-06-12 20:31:09,854 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 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 [2021-06-12 20:31:09,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:09,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:09,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:09,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276341193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:09,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:09,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:09,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703751040] [2021-06-12 20:31:09,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:09,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:09,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:09,993 INFO L87 Difference]: Start difference. First operand 28244 states and 62791 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:10,162 INFO L93 Difference]: Finished difference Result 29356 states and 64669 transitions. [2021-06-12 20:31:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:10,162 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:10,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:10,193 INFO L225 Difference]: With dead ends: 29356 [2021-06-12 20:31:10,193 INFO L226 Difference]: Without dead ends: 29352 [2021-06-12 20:31:10,193 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29352 states. [2021-06-12 20:31:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29352 to 27360. [2021-06-12 20:31:10,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27360 states, 27359 states have (on average 2.2246061625059395) internal successors, (60863), 27359 states have internal predecessors, (60863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 60863 transitions. [2021-06-12 20:31:10,567 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 60863 transitions. Word has length 56 [2021-06-12 20:31:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:10,567 INFO L482 AbstractCegarLoop]: Abstraction has 27360 states and 60863 transitions. [2021-06-12 20:31:10,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 60863 transitions. [2021-06-12 20:31:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:10,586 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:10,586 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:10,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:10,786 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:10,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1412824282, now seen corresponding path program 41 times [2021-06-12 20:31:10,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:10,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567657] [2021-06-12 20:31:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:10,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:10,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567657] [2021-06-12 20:31:10,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:10,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153415692] [2021-06-12 20:31:10,823 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 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 [2021-06-12 20:31:10,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:31:10,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:10,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:10,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153415692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:10,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:10,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:10,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593433599] [2021-06-12 20:31:10,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:10,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:10,954 INFO L87 Difference]: Start difference. First operand 27360 states and 60863 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:11,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:11,147 INFO L93 Difference]: Finished difference Result 35236 states and 77241 transitions. [2021-06-12 20:31:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:11,196 INFO L225 Difference]: With dead ends: 35236 [2021-06-12 20:31:11,196 INFO L226 Difference]: Without dead ends: 35236 [2021-06-12 20:31:11,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:11,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2021-06-12 20:31:11,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 31608. [2021-06-12 20:31:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31608 states, 31607 states have (on average 2.2330180023412534) internal successors, (70579), 31607 states have internal predecessors, (70579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 70579 transitions. [2021-06-12 20:31:11,591 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 70579 transitions. Word has length 56 [2021-06-12 20:31:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:11,591 INFO L482 AbstractCegarLoop]: Abstraction has 31608 states and 70579 transitions. [2021-06-12 20:31:11,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 70579 transitions. [2021-06-12 20:31:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:11,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:11,611 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:11,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:11,812 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:11,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:11,812 INFO L82 PathProgramCache]: Analyzing trace with hash -417869413, now seen corresponding path program 42 times [2021-06-12 20:31:11,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:11,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481036437] [2021-06-12 20:31:11,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:11,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:11,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481036437] [2021-06-12 20:31:11,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481036437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:11,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230244063] [2021-06-12 20:31:11,846 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 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 [2021-06-12 20:31:11,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:31:11,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:11,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:11,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:11,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230244063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:11,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:11,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:11,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823781157] [2021-06-12 20:31:11,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:11,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:11,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:11,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:11,953 INFO L87 Difference]: Start difference. First operand 31608 states and 70579 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:12,112 INFO L93 Difference]: Finished difference Result 34730 states and 77163 transitions. [2021-06-12 20:31:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:12,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:12,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:12,149 INFO L225 Difference]: With dead ends: 34730 [2021-06-12 20:31:12,149 INFO L226 Difference]: Without dead ends: 34724 [2021-06-12 20:31:12,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34724 states. [2021-06-12 20:31:12,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34724 to 33620. [2021-06-12 20:31:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33620 states, 33619 states have (on average 2.240013087837235) internal successors, (75307), 33619 states have internal predecessors, (75307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:12,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 75307 transitions. [2021-06-12 20:31:12,636 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 75307 transitions. Word has length 56 [2021-06-12 20:31:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:12,637 INFO L482 AbstractCegarLoop]: Abstraction has 33620 states and 75307 transitions. [2021-06-12 20:31:12,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:12,637 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 75307 transitions. [2021-06-12 20:31:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:12,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:12,657 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:12,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 20:31:12,861 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:12,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:12,861 INFO L82 PathProgramCache]: Analyzing trace with hash -113143793, now seen corresponding path program 43 times [2021-06-12 20:31:12,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:12,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331340060] [2021-06-12 20:31:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:12,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331340060] [2021-06-12 20:31:12,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331340060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:12,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019587639] [2021-06-12 20:31:12,898 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 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 [2021-06-12 20:31:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:12,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:12,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:13,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019587639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:13,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:13,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:13,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800432718] [2021-06-12 20:31:13,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:13,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:13,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:13,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:13,008 INFO L87 Difference]: Start difference. First operand 33620 states and 75307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:13,159 INFO L93 Difference]: Finished difference Result 35642 states and 78991 transitions. [2021-06-12 20:31:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:13,160 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:13,196 INFO L225 Difference]: With dead ends: 35642 [2021-06-12 20:31:13,196 INFO L226 Difference]: Without dead ends: 35640 [2021-06-12 20:31:13,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:13,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35640 states. [2021-06-12 20:31:13,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35640 to 33704. [2021-06-12 20:31:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33704 states, 33703 states have (on average 2.237159896745097) internal successors, (75399), 33703 states have internal predecessors, (75399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 75399 transitions. [2021-06-12 20:31:13,582 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 75399 transitions. Word has length 56 [2021-06-12 20:31:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:13,582 INFO L482 AbstractCegarLoop]: Abstraction has 33704 states and 75399 transitions. [2021-06-12 20:31:13,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 75399 transitions. [2021-06-12 20:31:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:13,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:13,603 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:13,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:13,803 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash 93331046, now seen corresponding path program 44 times [2021-06-12 20:31:13,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:13,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549036880] [2021-06-12 20:31:13,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:13,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:13,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549036880] [2021-06-12 20:31:13,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549036880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:13,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881037948] [2021-06-12 20:31:13,847 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 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 [2021-06-12 20:31:13,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:13,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:13,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:13,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:13,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881037948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:13,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:13,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:13,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983484345] [2021-06-12 20:31:13,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:13,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:13,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:13,953 INFO L87 Difference]: Start difference. First operand 33704 states and 75399 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:14,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:14,136 INFO L93 Difference]: Finished difference Result 35791 states and 78899 transitions. [2021-06-12 20:31:14,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:14,137 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:14,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:14,174 INFO L225 Difference]: With dead ends: 35791 [2021-06-12 20:31:14,175 INFO L226 Difference]: Without dead ends: 35723 [2021-06-12 20:31:14,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2021-06-12 20:31:14,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 33624. [2021-06-12 20:31:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33624 states, 33623 states have (on average 2.2343931237545727) internal successors, (75127), 33623 states have internal predecessors, (75127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33624 states to 33624 states and 75127 transitions. [2021-06-12 20:31:14,563 INFO L78 Accepts]: Start accepts. Automaton has 33624 states and 75127 transitions. Word has length 56 [2021-06-12 20:31:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:14,563 INFO L482 AbstractCegarLoop]: Abstraction has 33624 states and 75127 transitions. [2021-06-12 20:31:14,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 33624 states and 75127 transitions. [2021-06-12 20:31:14,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:14,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:14,730 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:14,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 20:31:14,930 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:14,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash 277060133, now seen corresponding path program 45 times [2021-06-12 20:31:14,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:14,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758684943] [2021-06-12 20:31:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:14,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:14,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758684943] [2021-06-12 20:31:14,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758684943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:14,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160535886] [2021-06-12 20:31:14,969 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 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 [2021-06-12 20:31:15,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:31:15,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:15,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:15,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:15,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160535886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:15,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:15,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:15,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165945572] [2021-06-12 20:31:15,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:15,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:15,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:15,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:15,102 INFO L87 Difference]: Start difference. First operand 33624 states and 75127 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:15,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:15,266 INFO L93 Difference]: Finished difference Result 35258 states and 78007 transitions. [2021-06-12 20:31:15,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:15,267 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-06-12 20:31:15,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:15,301 INFO L225 Difference]: With dead ends: 35258 [2021-06-12 20:31:15,301 INFO L226 Difference]: Without dead ends: 35256 [2021-06-12 20:31:15,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2021-06-12 20:31:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 33208. [2021-06-12 20:31:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2308248260908843) internal successors, (74079), 33207 states have internal predecessors, (74079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:15,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74079 transitions. [2021-06-12 20:31:15,665 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74079 transitions. Word has length 56 [2021-06-12 20:31:15,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:15,665 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74079 transitions. [2021-06-12 20:31:15,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74079 transitions. [2021-06-12 20:31:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:15,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:15,684 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:15,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 20:31:15,885 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:15,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:15,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1851558476, now seen corresponding path program 46 times [2021-06-12 20:31:15,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:15,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358526803] [2021-06-12 20:31:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:15,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:15,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358526803] [2021-06-12 20:31:15,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358526803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:15,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937208183] [2021-06-12 20:31:15,925 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 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 [2021-06-12 20:31:15,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:15,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:15,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:15,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:16,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937208183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:16,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:16,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:16,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429828209] [2021-06-12 20:31:16,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:16,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:16,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:16,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:16,051 INFO L87 Difference]: Start difference. First operand 33208 states and 74079 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:16,238 INFO L93 Difference]: Finished difference Result 34889 states and 76950 transitions. [2021-06-12 20:31:16,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:31:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-06-12 20:31:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:16,275 INFO L225 Difference]: With dead ends: 34889 [2021-06-12 20:31:16,275 INFO L226 Difference]: Without dead ends: 34865 [2021-06-12 20:31:16,275 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34865 states. [2021-06-12 20:31:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34865 to 33208. [2021-06-12 20:31:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2297407173186374) internal successors, (74043), 33207 states have internal predecessors, (74043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74043 transitions. [2021-06-12 20:31:16,688 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74043 transitions. Word has length 56 [2021-06-12 20:31:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:16,688 INFO L482 AbstractCegarLoop]: Abstraction has 33208 states and 74043 transitions. [2021-06-12 20:31:16,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74043 transitions. [2021-06-12 20:31:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:16,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:16,710 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:16,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 20:31:16,910 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1633200633, now seen corresponding path program 47 times [2021-06-12 20:31:16,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:16,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237959017] [2021-06-12 20:31:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:31:16,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:16,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237959017] [2021-06-12 20:31:16,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237959017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:16,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919848514] [2021-06-12 20:31:16,945 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 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 [2021-06-12 20:31:16,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:31:16,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:16,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:16,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:31:17,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919848514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:17,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:17,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:17,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430953886] [2021-06-12 20:31:17,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:17,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:17,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:17,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:17,077 INFO L87 Difference]: Start difference. First operand 33208 states and 74043 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 20:31:17,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:17,240 INFO L93 Difference]: Finished difference Result 35848 states and 79532 transitions. [2021-06-12 20:31:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:31:17,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-06-12 20:31:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:17,280 INFO L225 Difference]: With dead ends: 35848 [2021-06-12 20:31:17,280 INFO L226 Difference]: Without dead ends: 35812 [2021-06-12 20:31:17,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-06-12 20:31:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 32944. [2021-06-12 20:31:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32944 states, 32943 states have (on average 2.231581823149076) internal successors, (73515), 32943 states have internal predecessors, (73515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32944 states to 32944 states and 73515 transitions. [2021-06-12 20:31:17,767 INFO L78 Accepts]: Start accepts. Automaton has 32944 states and 73515 transitions. Word has length 56 [2021-06-12 20:31:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:17,767 INFO L482 AbstractCegarLoop]: Abstraction has 32944 states and 73515 transitions. [2021-06-12 20:31:17,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 20:31:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 32944 states and 73515 transitions. [2021-06-12 20:31:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:17,787 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:17,787 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:17,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 20:31:17,988 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:17,988 INFO L82 PathProgramCache]: Analyzing trace with hash -916831962, now seen corresponding path program 48 times [2021-06-12 20:31:17,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:17,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045025976] [2021-06-12 20:31:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:18,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:18,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045025976] [2021-06-12 20:31:18,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045025976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:18,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130680228] [2021-06-12 20:31:18,016 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 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 [2021-06-12 20:31:18,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 20:31:18,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:18,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130680228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:18,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:18,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:18,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322720415] [2021-06-12 20:31:18,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:18,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:18,124 INFO L87 Difference]: Start difference. First operand 32944 states and 73515 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:18,346 INFO L93 Difference]: Finished difference Result 40718 states and 89870 transitions. [2021-06-12 20:31:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:18,407 INFO L225 Difference]: With dead ends: 40718 [2021-06-12 20:31:18,407 INFO L226 Difference]: Without dead ends: 40718 [2021-06-12 20:31:18,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2021-06-12 20:31:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 37152. [2021-06-12 20:31:18,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37152 states, 37151 states have (on average 2.2417431563080403) internal successors, (83283), 37151 states have internal predecessors, (83283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 83283 transitions. [2021-06-12 20:31:19,006 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 83283 transitions. Word has length 56 [2021-06-12 20:31:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:19,006 INFO L482 AbstractCegarLoop]: Abstraction has 37152 states and 83283 transitions. [2021-06-12 20:31:19,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 83283 transitions. [2021-06-12 20:31:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:19,027 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:19,027 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:19,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:19,241 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash 78122907, now seen corresponding path program 49 times [2021-06-12 20:31:19,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:19,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449375697] [2021-06-12 20:31:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:19,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:19,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449375697] [2021-06-12 20:31:19,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449375697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:19,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465973443] [2021-06-12 20:31:19,272 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 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 [2021-06-12 20:31:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:19,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:19,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:19,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465973443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:19,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:19,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:19,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134168179] [2021-06-12 20:31:19,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:19,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:19,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:19,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:19,369 INFO L87 Difference]: Start difference. First operand 37152 states and 83283 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:19,550 INFO L93 Difference]: Finished difference Result 40524 states and 90274 transitions. [2021-06-12 20:31:19,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:19,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:19,596 INFO L225 Difference]: With dead ends: 40524 [2021-06-12 20:31:19,596 INFO L226 Difference]: Without dead ends: 40488 [2021-06-12 20:31:19,596 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40488 states. [2021-06-12 20:31:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40488 to 36712. [2021-06-12 20:31:20,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36712 states, 36711 states have (on average 2.242025550924791) internal successors, (82307), 36711 states have internal predecessors, (82307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36712 states to 36712 states and 82307 transitions. [2021-06-12 20:31:20,262 INFO L78 Accepts]: Start accepts. Automaton has 36712 states and 82307 transitions. Word has length 56 [2021-06-12 20:31:20,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:20,262 INFO L482 AbstractCegarLoop]: Abstraction has 36712 states and 82307 transitions. [2021-06-12 20:31:20,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:20,262 INFO L276 IsEmpty]: Start isEmpty. Operand 36712 states and 82307 transitions. [2021-06-12 20:31:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:20,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:20,282 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:20,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:20,482 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash 382848527, now seen corresponding path program 50 times [2021-06-12 20:31:20,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:20,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773278155] [2021-06-12 20:31:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:20,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773278155] [2021-06-12 20:31:20,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773278155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940885458] [2021-06-12 20:31:20,523 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 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 [2021-06-12 20:31:20,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:20,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:20,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:20,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:20,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940885458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:20,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:20,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:20,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633045671] [2021-06-12 20:31:20,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:20,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:20,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:20,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:20,647 INFO L87 Difference]: Start difference. First operand 36712 states and 82307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:20,818 INFO L93 Difference]: Finished difference Result 39280 states and 87158 transitions. [2021-06-12 20:31:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:20,862 INFO L225 Difference]: With dead ends: 39280 [2021-06-12 20:31:20,862 INFO L226 Difference]: Without dead ends: 39278 [2021-06-12 20:31:20,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39278 states. [2021-06-12 20:31:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39278 to 36836. [2021-06-12 20:31:21,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36836 states, 36835 states have (on average 2.2415365820551107) internal successors, (82567), 36835 states have internal predecessors, (82567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36836 states to 36836 states and 82567 transitions. [2021-06-12 20:31:21,447 INFO L78 Accepts]: Start accepts. Automaton has 36836 states and 82567 transitions. Word has length 56 [2021-06-12 20:31:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:21,448 INFO L482 AbstractCegarLoop]: Abstraction has 36836 states and 82567 transitions. [2021-06-12 20:31:21,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 36836 states and 82567 transitions. [2021-06-12 20:31:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:21,468 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:21,468 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:21,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:21,668 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:21,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:21,669 INFO L82 PathProgramCache]: Analyzing trace with hash 589323366, now seen corresponding path program 51 times [2021-06-12 20:31:21,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:21,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230268911] [2021-06-12 20:31:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:21,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:21,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230268911] [2021-06-12 20:31:21,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230268911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:21,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56636607] [2021-06-12 20:31:21,718 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 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 [2021-06-12 20:31:21,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:31:21,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:21,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:31:21,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 20:31:21,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56636607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:21,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:21,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-12 20:31:21,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161735190] [2021-06-12 20:31:21,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:31:21,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:21,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:31:21,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:21,880 INFO L87 Difference]: Start difference. First operand 36836 states and 82567 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 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) [2021-06-12 20:31:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:22,818 INFO L93 Difference]: Finished difference Result 65704 states and 142418 transitions. [2021-06-12 20:31:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 20:31:22,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 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 56 [2021-06-12 20:31:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:22,890 INFO L225 Difference]: With dead ends: 65704 [2021-06-12 20:31:22,890 INFO L226 Difference]: Without dead ends: 65560 [2021-06-12 20:31:22,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 20:31:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65560 states. [2021-06-12 20:31:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65560 to 50470. [2021-06-12 20:31:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50470 states, 50469 states have (on average 2.2044225167924867) internal successors, (111255), 50469 states have internal predecessors, (111255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:23,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 111255 transitions. [2021-06-12 20:31:23,752 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 111255 transitions. Word has length 56 [2021-06-12 20:31:23,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:23,752 INFO L482 AbstractCegarLoop]: Abstraction has 50470 states and 111255 transitions. [2021-06-12 20:31:23,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 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) [2021-06-12 20:31:23,753 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 111255 transitions. [2021-06-12 20:31:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:23,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:23,780 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:23,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 20:31:23,980 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:23,981 INFO L82 PathProgramCache]: Analyzing trace with hash 773052453, now seen corresponding path program 52 times [2021-06-12 20:31:23,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:23,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415479049] [2021-06-12 20:31:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:24,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:24,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415479049] [2021-06-12 20:31:24,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415479049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:24,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387946898] [2021-06-12 20:31:24,018 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 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 [2021-06-12 20:31:24,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:24,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:24,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:24,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:24,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387946898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:24,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:24,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:24,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539438557] [2021-06-12 20:31:24,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:24,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:24,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:24,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:24,138 INFO L87 Difference]: Start difference. First operand 50470 states and 111255 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:24,722 INFO L93 Difference]: Finished difference Result 57450 states and 125218 transitions. [2021-06-12 20:31:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:31:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-06-12 20:31:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:24,791 INFO L225 Difference]: With dead ends: 57450 [2021-06-12 20:31:24,792 INFO L226 Difference]: Without dead ends: 57432 [2021-06-12 20:31:24,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:31:24,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2021-06-12 20:31:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 50730. [2021-06-12 20:31:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50730 states, 50729 states have (on average 2.2019554889708055) internal successors, (111703), 50729 states have internal predecessors, (111703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50730 states to 50730 states and 111703 transitions. [2021-06-12 20:31:25,635 INFO L78 Accepts]: Start accepts. Automaton has 50730 states and 111703 transitions. Word has length 56 [2021-06-12 20:31:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:25,636 INFO L482 AbstractCegarLoop]: Abstraction has 50730 states and 111703 transitions. [2021-06-12 20:31:25,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 50730 states and 111703 transitions. [2021-06-12 20:31:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:25,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:25,662 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:25,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:25,863 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:25,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:25,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2069049913, now seen corresponding path program 53 times [2021-06-12 20:31:25,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:25,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708113475] [2021-06-12 20:31:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:25,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708113475] [2021-06-12 20:31:25,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708113475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750920348] [2021-06-12 20:31:25,902 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 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 [2021-06-12 20:31:25,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:31:25,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:25,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:25,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:26,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750920348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:26,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:26,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:31:26,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352576308] [2021-06-12 20:31:26,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:31:26,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:26,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:31:26,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:31:26,007 INFO L87 Difference]: Start difference. First operand 50730 states and 111703 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2021-06-12 20:31:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:26,371 INFO L93 Difference]: Finished difference Result 53406 states and 116710 transitions. [2021-06-12 20:31:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:26,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 56 [2021-06-12 20:31:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:26,432 INFO L225 Difference]: With dead ends: 53406 [2021-06-12 20:31:26,432 INFO L226 Difference]: Without dead ends: 53388 [2021-06-12 20:31:26,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:31:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2021-06-12 20:31:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 45578. [2021-06-12 20:31:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45578 states, 45577 states have (on average 2.197402198477302) internal successors, (100151), 45577 states have internal predecessors, (100151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:27,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45578 states to 45578 states and 100151 transitions. [2021-06-12 20:31:27,252 INFO L78 Accepts]: Start accepts. Automaton has 45578 states and 100151 transitions. Word has length 56 [2021-06-12 20:31:27,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:27,252 INFO L482 AbstractCegarLoop]: Abstraction has 45578 states and 100151 transitions. [2021-06-12 20:31:27,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2021-06-12 20:31:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 45578 states and 100151 transitions. [2021-06-12 20:31:27,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:27,275 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:27,275 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:27,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 20:31:27,475 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:27,476 INFO L82 PathProgramCache]: Analyzing trace with hash -361343013, now seen corresponding path program 54 times [2021-06-12 20:31:27,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:27,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576708361] [2021-06-12 20:31:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:31:27,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:27,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576708361] [2021-06-12 20:31:27,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576708361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:27,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053747502] [2021-06-12 20:31:27,516 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 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 [2021-06-12 20:31:27,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:31:27,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:27,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:31:27,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053747502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:27,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:27,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:27,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053344642] [2021-06-12 20:31:27,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:27,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:27,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:27,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:27,626 INFO L87 Difference]: Start difference. First operand 45578 states and 100151 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2021-06-12 20:31:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:27,964 INFO L93 Difference]: Finished difference Result 49711 states and 108806 transitions. [2021-06-12 20:31:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:27,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 56 [2021-06-12 20:31:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:28,025 INFO L225 Difference]: With dead ends: 49711 [2021-06-12 20:31:28,025 INFO L226 Difference]: Without dead ends: 49645 [2021-06-12 20:31:28,025 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:28,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-06-12 20:31:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 48590. [2021-06-12 20:31:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48590 states, 48589 states have (on average 2.2018769680380332) internal successors, (106987), 48589 states have internal predecessors, (106987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48590 states to 48590 states and 106987 transitions. [2021-06-12 20:31:28,816 INFO L78 Accepts]: Start accepts. Automaton has 48590 states and 106987 transitions. Word has length 56 [2021-06-12 20:31:28,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:28,817 INFO L482 AbstractCegarLoop]: Abstraction has 48590 states and 106987 transitions. [2021-06-12 20:31:28,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2021-06-12 20:31:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 48590 states and 106987 transitions. [2021-06-12 20:31:28,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:28,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:28,837 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:29,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:29,038 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash -378550939, now seen corresponding path program 55 times [2021-06-12 20:31:29,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:29,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985989705] [2021-06-12 20:31:29,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:31:29,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:29,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985989705] [2021-06-12 20:31:29,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985989705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:29,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739471797] [2021-06-12 20:31:29,072 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 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 [2021-06-12 20:31:29,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:29,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:31:29,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739471797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:29,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:29,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:29,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505840901] [2021-06-12 20:31:29,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:29,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:29,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:29,195 INFO L87 Difference]: Start difference. First operand 48590 states and 106987 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 20:31:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:29,730 INFO L93 Difference]: Finished difference Result 51903 states and 113860 transitions. [2021-06-12 20:31:29,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:31:29,731 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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 56 [2021-06-12 20:31:29,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:29,793 INFO L225 Difference]: With dead ends: 51903 [2021-06-12 20:31:29,794 INFO L226 Difference]: Without dead ends: 51867 [2021-06-12 20:31:29,794 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:29,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-06-12 20:31:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 50962. [2021-06-12 20:31:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 2.2042542336296385) internal successors, (112331), 50961 states have internal predecessors, (112331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 112331 transitions. [2021-06-12 20:31:30,566 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 112331 transitions. Word has length 56 [2021-06-12 20:31:30,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:30,566 INFO L482 AbstractCegarLoop]: Abstraction has 50962 states and 112331 transitions. [2021-06-12 20:31:30,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 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) [2021-06-12 20:31:30,566 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 112331 transitions. [2021-06-12 20:31:30,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:30,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:30,590 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:30,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 20:31:30,791 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:30,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1368047205, now seen corresponding path program 56 times [2021-06-12 20:31:30,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:30,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996165733] [2021-06-12 20:31:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:30,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:30,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996165733] [2021-06-12 20:31:30,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996165733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:30,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703415377] [2021-06-12 20:31:30,824 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:30,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:30,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:30,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:30,931 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:30,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703415377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:30,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:30,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:30,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627836423] [2021-06-12 20:31:30,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:30,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:30,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:30,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:30,932 INFO L87 Difference]: Start difference. First operand 50962 states and 112331 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:31,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:31,278 INFO L93 Difference]: Finished difference Result 54564 states and 119631 transitions. [2021-06-12 20:31:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:31,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:31,339 INFO L225 Difference]: With dead ends: 54564 [2021-06-12 20:31:31,339 INFO L226 Difference]: Without dead ends: 54522 [2021-06-12 20:31:31,340 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-06-12 20:31:32,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 50922. [2021-06-12 20:31:32,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50922 states, 50921 states have (on average 2.2044932346183304) internal successors, (112255), 50921 states have internal predecessors, (112255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 112255 transitions. [2021-06-12 20:31:32,169 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 112255 transitions. Word has length 56 [2021-06-12 20:31:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:32,169 INFO L482 AbstractCegarLoop]: Abstraction has 50922 states and 112255 transitions. [2021-06-12 20:31:32,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 112255 transitions. [2021-06-12 20:31:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:32,194 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:32,194 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:32,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:32,394 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:32,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:32,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1063321585, now seen corresponding path program 57 times [2021-06-12 20:31:32,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:32,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264922631] [2021-06-12 20:31:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:32,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:32,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264922631] [2021-06-12 20:31:32,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264922631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:32,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292412433] [2021-06-12 20:31:32,428 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 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 [2021-06-12 20:31:32,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 20:31:32,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:32,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:32,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:32,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292412433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:32,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:32,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:32,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263409092] [2021-06-12 20:31:32,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:32,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:32,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:32,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:32,559 INFO L87 Difference]: Start difference. First operand 50922 states and 112255 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:32,942 INFO L93 Difference]: Finished difference Result 54000 states and 117977 transitions. [2021-06-12 20:31:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:33,000 INFO L225 Difference]: With dead ends: 54000 [2021-06-12 20:31:33,000 INFO L226 Difference]: Without dead ends: 53998 [2021-06-12 20:31:33,000 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:33,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-06-12 20:31:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 51006. [2021-06-12 20:31:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51006 states, 51005 states have (on average 2.203842760513675) internal successors, (112407), 51005 states have internal predecessors, (112407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51006 states to 51006 states and 112407 transitions. [2021-06-12 20:31:33,820 INFO L78 Accepts]: Start accepts. Automaton has 51006 states and 112407 transitions. Word has length 56 [2021-06-12 20:31:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:33,820 INFO L482 AbstractCegarLoop]: Abstraction has 51006 states and 112407 transitions. [2021-06-12 20:31:33,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:33,820 INFO L276 IsEmpty]: Start isEmpty. Operand 51006 states and 112407 transitions. [2021-06-12 20:31:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:33,847 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:33,847 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:34,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 20:31:34,047 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash -673117659, now seen corresponding path program 58 times [2021-06-12 20:31:34,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:34,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881726528] [2021-06-12 20:31:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:34,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:34,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881726528] [2021-06-12 20:31:34,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881726528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:34,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995745027] [2021-06-12 20:31:34,089 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 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 [2021-06-12 20:31:34,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:34,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:34,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:34,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:34,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995745027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:34,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:34,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:34,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734129810] [2021-06-12 20:31:34,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:34,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:34,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:34,232 INFO L87 Difference]: Start difference. First operand 51006 states and 112407 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:34,639 INFO L93 Difference]: Finished difference Result 57784 states and 125981 transitions. [2021-06-12 20:31:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:31:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-06-12 20:31:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:34,700 INFO L225 Difference]: With dead ends: 57784 [2021-06-12 20:31:34,700 INFO L226 Difference]: Without dead ends: 57782 [2021-06-12 20:31:34,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:31:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57782 states. [2021-06-12 20:31:35,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57782 to 51426. [2021-06-12 20:31:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51426 states, 51425 states have (on average 2.202566844919786) internal successors, (113267), 51425 states have internal predecessors, (113267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51426 states to 51426 states and 113267 transitions. [2021-06-12 20:31:35,533 INFO L78 Accepts]: Start accepts. Automaton has 51426 states and 113267 transitions. Word has length 56 [2021-06-12 20:31:35,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:35,533 INFO L482 AbstractCegarLoop]: Abstraction has 51426 states and 113267 transitions. [2021-06-12 20:31:35,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 51426 states and 113267 transitions. [2021-06-12 20:31:35,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:35,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:35,570 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:35,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-12 20:31:35,770 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash 779747271, now seen corresponding path program 59 times [2021-06-12 20:31:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:35,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225132339] [2021-06-12 20:31:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:35,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:35,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225132339] [2021-06-12 20:31:35,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225132339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:35,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127426443] [2021-06-12 20:31:35,817 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 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 [2021-06-12 20:31:35,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:31:35,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:35,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127426443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:35,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:35,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:31:35,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431365699] [2021-06-12 20:31:35,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:31:35,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:35,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:31:35,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:31:35,931 INFO L87 Difference]: Start difference. First operand 51426 states and 113267 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2021-06-12 20:31:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:36,191 INFO L93 Difference]: Finished difference Result 56504 states and 123265 transitions. [2021-06-12 20:31:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:31:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 56 [2021-06-12 20:31:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:36,254 INFO L225 Difference]: With dead ends: 56504 [2021-06-12 20:31:36,255 INFO L226 Difference]: Without dead ends: 56502 [2021-06-12 20:31:36,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:31:36,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56502 states. [2021-06-12 20:31:37,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56502 to 51506. [2021-06-12 20:31:37,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51506 states, 51505 states have (on average 2.2005436365401416) internal successors, (113339), 51505 states have internal predecessors, (113339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:37,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51506 states to 51506 states and 113339 transitions. [2021-06-12 20:31:37,171 INFO L78 Accepts]: Start accepts. Automaton has 51506 states and 113339 transitions. Word has length 56 [2021-06-12 20:31:37,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:37,171 INFO L482 AbstractCegarLoop]: Abstraction has 51506 states and 113339 transitions. [2021-06-12 20:31:37,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2021-06-12 20:31:37,171 INFO L276 IsEmpty]: Start isEmpty. Operand 51506 states and 113339 transitions. [2021-06-12 20:31:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:37,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:37,196 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:37,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:37,401 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:37,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:37,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1081723995, now seen corresponding path program 60 times [2021-06-12 20:31:37,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:37,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918901341] [2021-06-12 20:31:37,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:37,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:37,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918901341] [2021-06-12 20:31:37,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918901341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:37,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205715705] [2021-06-12 20:31:37,446 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 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 [2021-06-12 20:31:37,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 20:31:37,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:37,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:37,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205715705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:37,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:37,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:31:37,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031255973] [2021-06-12 20:31:37,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:31:37,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:37,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:31:37,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:31:37,563 INFO L87 Difference]: Start difference. First operand 51506 states and 113339 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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) [2021-06-12 20:31:37,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:37,998 INFO L93 Difference]: Finished difference Result 53832 states and 117559 transitions. [2021-06-12 20:31:37,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:37,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 56 [2021-06-12 20:31:37,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:38,053 INFO L225 Difference]: With dead ends: 53832 [2021-06-12 20:31:38,053 INFO L226 Difference]: Without dead ends: 53830 [2021-06-12 20:31:38,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:31:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2021-06-12 20:31:38,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 49874. [2021-06-12 20:31:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49874 states, 49873 states have (on average 2.2004892426763982) internal successors, (109745), 49873 states have internal predecessors, (109745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49874 states to 49874 states and 109745 transitions. [2021-06-12 20:31:38,715 INFO L78 Accepts]: Start accepts. Automaton has 49874 states and 109745 transitions. Word has length 56 [2021-06-12 20:31:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:38,715 INFO L482 AbstractCegarLoop]: Abstraction has 49874 states and 109745 transitions. [2021-06-12 20:31:38,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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) [2021-06-12 20:31:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 49874 states and 109745 transitions. [2021-06-12 20:31:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:38,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:38,743 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:38,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:38,943 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash 2020283719, now seen corresponding path program 61 times [2021-06-12 20:31:38,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:38,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453815180] [2021-06-12 20:31:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:38,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:38,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453815180] [2021-06-12 20:31:38,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453815180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:38,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156081904] [2021-06-12 20:31:38,993 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 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 [2021-06-12 20:31:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:39,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:39,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156081904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:39,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:39,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:31:39,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103406509] [2021-06-12 20:31:39,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:31:39,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:39,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:31:39,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:31:39,276 INFO L87 Difference]: Start difference. First operand 49874 states and 109745 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) [2021-06-12 20:31:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:39,536 INFO L93 Difference]: Finished difference Result 51331 states and 112086 transitions. [2021-06-12 20:31:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:31:39,536 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 56 [2021-06-12 20:31:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:39,595 INFO L225 Difference]: With dead ends: 51331 [2021-06-12 20:31:39,595 INFO L226 Difference]: Without dead ends: 51235 [2021-06-12 20:31:39,596 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:31:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51235 states. [2021-06-12 20:31:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51235 to 47230. [2021-06-12 20:31:40,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.193673378644477) internal successors, (103605), 47229 states have internal predecessors, (103605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103605 transitions. [2021-06-12 20:31:40,454 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103605 transitions. Word has length 56 [2021-06-12 20:31:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:40,454 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103605 transitions. [2021-06-12 20:31:40,454 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) [2021-06-12 20:31:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103605 transitions. [2021-06-12 20:31:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:40,482 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:40,482 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:40,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 20:31:40,697 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:40,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:40,698 INFO L82 PathProgramCache]: Analyzing trace with hash 517101275, now seen corresponding path program 62 times [2021-06-12 20:31:40,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:40,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188018808] [2021-06-12 20:31:40,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:31:40,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:40,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188018808] [2021-06-12 20:31:40,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188018808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:40,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95895469] [2021-06-12 20:31:40,742 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 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 [2021-06-12 20:31:40,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:40,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:40,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:40,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:31:40,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95895469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:40,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:40,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:31:40,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828636030] [2021-06-12 20:31:40,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:31:40,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:40,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:31:40,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:31:40,843 INFO L87 Difference]: Start difference. First operand 47230 states and 103605 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) [2021-06-12 20:31:41,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:41,061 INFO L93 Difference]: Finished difference Result 48435 states and 105506 transitions. [2021-06-12 20:31:41,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:31:41,061 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 56 [2021-06-12 20:31:41,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:41,112 INFO L225 Difference]: With dead ends: 48435 [2021-06-12 20:31:41,112 INFO L226 Difference]: Without dead ends: 48369 [2021-06-12 20:31:41,112 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:31:41,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2021-06-12 20:31:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 47230. [2021-06-12 20:31:41,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1912172605814226) internal successors, (103489), 47229 states have internal predecessors, (103489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:41,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103489 transitions. [2021-06-12 20:31:41,892 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103489 transitions. Word has length 56 [2021-06-12 20:31:41,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:41,892 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103489 transitions. [2021-06-12 20:31:41,892 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) [2021-06-12 20:31:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103489 transitions. [2021-06-12 20:31:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:41,917 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:41,918 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:42,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:42,118 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:42,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:42,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1809607417, now seen corresponding path program 63 times [2021-06-12 20:31:42,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:42,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702613321] [2021-06-12 20:31:42,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:42,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:42,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702613321] [2021-06-12 20:31:42,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702613321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:42,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542140434] [2021-06-12 20:31:42,155 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 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 [2021-06-12 20:31:42,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 20:31:42,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:42,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:42,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:31:42,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542140434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:42,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:42,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:42,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655606094] [2021-06-12 20:31:42,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:42,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:42,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:42,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:42,266 INFO L87 Difference]: Start difference. First operand 47230 states and 103489 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-06-12 20:31:42,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:42,468 INFO L93 Difference]: Finished difference Result 48187 states and 104966 transitions. [2021-06-12 20:31:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:31:42,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 [2021-06-12 20:31:42,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:42,519 INFO L225 Difference]: With dead ends: 48187 [2021-06-12 20:31:42,519 INFO L226 Difference]: Without dead ends: 48151 [2021-06-12 20:31:42,519 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:42,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48151 states. [2021-06-12 20:31:43,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48151 to 47230. [2021-06-12 20:31:43,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1896927735078022) internal successors, (103417), 47229 states have internal predecessors, (103417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103417 transitions. [2021-06-12 20:31:43,376 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103417 transitions. Word has length 56 [2021-06-12 20:31:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:43,376 INFO L482 AbstractCegarLoop]: Abstraction has 47230 states and 103417 transitions. [2021-06-12 20:31:43,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-06-12 20:31:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103417 transitions. [2021-06-12 20:31:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:43,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:43,403 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:43,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 20:31:43,604 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:43,604 INFO L82 PathProgramCache]: Analyzing trace with hash 2068840347, now seen corresponding path program 64 times [2021-06-12 20:31:43,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:43,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208186152] [2021-06-12 20:31:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:43,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:43,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208186152] [2021-06-12 20:31:43,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208186152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:43,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322969701] [2021-06-12 20:31:43,645 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 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 [2021-06-12 20:31:43,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:43,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:43,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:43,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:43,743 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:43,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322969701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:43,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:43,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:43,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926341301] [2021-06-12 20:31:43,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:43,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:43,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:43,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:43,744 INFO L87 Difference]: Start difference. First operand 47230 states and 103417 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:43,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:43,958 INFO L93 Difference]: Finished difference Result 51250 states and 111816 transitions. [2021-06-12 20:31:43,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:43,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:43,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:44,013 INFO L225 Difference]: With dead ends: 51250 [2021-06-12 20:31:44,013 INFO L226 Difference]: Without dead ends: 51244 [2021-06-12 20:31:44,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51244 states. [2021-06-12 20:31:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51244 to 50262. [2021-06-12 20:31:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50262 states, 50261 states have (on average 2.194723543104992) internal successors, (110309), 50261 states have internal predecessors, (110309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50262 states to 50262 states and 110309 transitions. [2021-06-12 20:31:44,906 INFO L78 Accepts]: Start accepts. Automaton has 50262 states and 110309 transitions. Word has length 56 [2021-06-12 20:31:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:44,906 INFO L482 AbstractCegarLoop]: Abstraction has 50262 states and 110309 transitions. [2021-06-12 20:31:44,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 50262 states and 110309 transitions. [2021-06-12 20:31:44,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:44,936 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:44,936 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:45,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:45,137 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:45,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1921401329, now seen corresponding path program 65 times [2021-06-12 20:31:45,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:45,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282792529] [2021-06-12 20:31:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:45,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:45,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282792529] [2021-06-12 20:31:45,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282792529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:45,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88173434] [2021-06-12 20:31:45,177 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 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 [2021-06-12 20:31:45,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 20:31:45,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:45,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:45,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:45,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88173434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:45,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:45,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 20:31:45,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616813155] [2021-06-12 20:31:45,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:31:45,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:45,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:31:45,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:31:45,337 INFO L87 Difference]: Start difference. First operand 50262 states and 110309 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:45,543 INFO L93 Difference]: Finished difference Result 52650 states and 114688 transitions. [2021-06-12 20:31:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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 56 [2021-06-12 20:31:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:45,604 INFO L225 Difference]: With dead ends: 52650 [2021-06-12 20:31:45,604 INFO L226 Difference]: Without dead ends: 52650 [2021-06-12 20:31:45,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:31:45,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52650 states. [2021-06-12 20:31:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52650 to 50294. [2021-06-12 20:31:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50294 states, 50293 states have (on average 2.1945996460740065) internal successors, (110373), 50293 states have internal predecessors, (110373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 110373 transitions. [2021-06-12 20:31:46,499 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 110373 transitions. Word has length 56 [2021-06-12 20:31:46,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:46,499 INFO L482 AbstractCegarLoop]: Abstraction has 50294 states and 110373 transitions. [2021-06-12 20:31:46,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 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) [2021-06-12 20:31:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 110373 transitions. [2021-06-12 20:31:46,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:46,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:46,533 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:46,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 20:31:46,734 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:46,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1531197403, now seen corresponding path program 66 times [2021-06-12 20:31:46,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:46,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153040424] [2021-06-12 20:31:46,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:46,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:46,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153040424] [2021-06-12 20:31:46,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153040424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:46,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211260977] [2021-06-12 20:31:46,770 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 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 [2021-06-12 20:31:46,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 20:31:46,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:46,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211260977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:46,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:46,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:46,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937532646] [2021-06-12 20:31:46,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:46,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:46,890 INFO L87 Difference]: Start difference. First operand 50294 states and 110373 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:47,143 INFO L93 Difference]: Finished difference Result 56418 states and 122592 transitions. [2021-06-12 20:31:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:31:47,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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 56 [2021-06-12 20:31:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:47,213 INFO L225 Difference]: With dead ends: 56418 [2021-06-12 20:31:47,213 INFO L226 Difference]: Without dead ends: 56418 [2021-06-12 20:31:47,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:31:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2021-06-12 20:31:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 50454. [2021-06-12 20:31:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50454 states, 50453 states have (on average 2.193982518383446) internal successors, (110693), 50453 states have internal predecessors, (110693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50454 states to 50454 states and 110693 transitions. [2021-06-12 20:31:48,144 INFO L78 Accepts]: Start accepts. Automaton has 50454 states and 110693 transitions. Word has length 56 [2021-06-12 20:31:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:48,145 INFO L482 AbstractCegarLoop]: Abstraction has 50454 states and 110693 transitions. [2021-06-12 20:31:48,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 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) [2021-06-12 20:31:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 50454 states and 110693 transitions. [2021-06-12 20:31:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:48,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:48,174 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:48,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:48,385 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash -78332473, now seen corresponding path program 67 times [2021-06-12 20:31:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:48,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708839610] [2021-06-12 20:31:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:48,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:48,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708839610] [2021-06-12 20:31:48,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708839610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:48,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713516581] [2021-06-12 20:31:48,443 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 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 [2021-06-12 20:31:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:48,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:48,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713516581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:48,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:48,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:31:48,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278925321] [2021-06-12 20:31:48,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:31:48,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:48,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:31:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:31:48,574 INFO L87 Difference]: Start difference. First operand 50454 states and 110693 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2021-06-12 20:31:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:48,864 INFO L93 Difference]: Finished difference Result 56662 states and 123166 transitions. [2021-06-12 20:31:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:31:48,865 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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 56 [2021-06-12 20:31:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:49,133 INFO L225 Difference]: With dead ends: 56662 [2021-06-12 20:31:49,133 INFO L226 Difference]: Without dead ends: 56662 [2021-06-12 20:31:49,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:31:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56662 states. [2021-06-12 20:31:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56662 to 50614. [2021-06-12 20:31:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50614 states, 50613 states have (on average 2.1933692924742654) internal successors, (111013), 50613 states have internal predecessors, (111013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50614 states to 50614 states and 111013 transitions. [2021-06-12 20:31:49,849 INFO L78 Accepts]: Start accepts. Automaton has 50614 states and 111013 transitions. Word has length 56 [2021-06-12 20:31:49,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:49,849 INFO L482 AbstractCegarLoop]: Abstraction has 50614 states and 111013 transitions. [2021-06-12 20:31:49,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 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) [2021-06-12 20:31:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 50614 states and 111013 transitions. [2021-06-12 20:31:49,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:49,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:49,877 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:50,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 20:31:50,078 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:50,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1939803739, now seen corresponding path program 68 times [2021-06-12 20:31:50,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:50,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381226288] [2021-06-12 20:31:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:50,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:50,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381226288] [2021-06-12 20:31:50,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381226288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:50,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153671122] [2021-06-12 20:31:50,125 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 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 [2021-06-12 20:31:50,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:31:50,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:50,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:50,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:50,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153671122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:50,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:50,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:31:50,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915263619] [2021-06-12 20:31:50,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:31:50,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:50,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:31:50,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:31:50,224 INFO L87 Difference]: Start difference. First operand 50614 states and 111013 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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) [2021-06-12 20:31:50,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:50,526 INFO L93 Difference]: Finished difference Result 54674 states and 118916 transitions. [2021-06-12 20:31:50,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:31:50,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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 56 [2021-06-12 20:31:50,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:50,769 INFO L225 Difference]: With dead ends: 54674 [2021-06-12 20:31:50,769 INFO L226 Difference]: Without dead ends: 54674 [2021-06-12 20:31:50,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:31:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54674 states. [2021-06-12 20:31:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54674 to 50774. [2021-06-12 20:31:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50774 states, 50773 states have (on average 2.192759931459634) internal successors, (111333), 50773 states have internal predecessors, (111333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50774 states to 50774 states and 111333 transitions. [2021-06-12 20:31:51,540 INFO L78 Accepts]: Start accepts. Automaton has 50774 states and 111333 transitions. Word has length 56 [2021-06-12 20:31:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:51,540 INFO L482 AbstractCegarLoop]: Abstraction has 50774 states and 111333 transitions. [2021-06-12 20:31:51,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 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) [2021-06-12 20:31:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 50774 states and 111333 transitions. [2021-06-12 20:31:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 20:31:51,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:51,570 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:51,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:51,779 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:51,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1664826169, now seen corresponding path program 69 times [2021-06-12 20:31:51,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:51,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832882933] [2021-06-12 20:31:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:51,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:51,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832882933] [2021-06-12 20:31:51,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832882933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:51,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756328134] [2021-06-12 20:31:51,842 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 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 [2021-06-12 20:31:51,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 20:31:51,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:51,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:31:51,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:51,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756328134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:51,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:51,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:31:51,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594511704] [2021-06-12 20:31:51,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:31:51,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:51,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:31:51,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:31:51,969 INFO L87 Difference]: Start difference. First operand 50774 states and 111333 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) [2021-06-12 20:31:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:52,284 INFO L93 Difference]: Finished difference Result 52880 states and 115293 transitions. [2021-06-12 20:31:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:31:52,284 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 56 [2021-06-12 20:31:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:52,532 INFO L225 Difference]: With dead ends: 52880 [2021-06-12 20:31:52,532 INFO L226 Difference]: Without dead ends: 52880 [2021-06-12 20:31:52,532 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:31:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2021-06-12 20:31:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 49354. [2021-06-12 20:31:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49354 states, 49353 states have (on average 2.193686300731465) internal successors, (108265), 49353 states have internal predecessors, (108265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 108265 transitions. [2021-06-12 20:31:53,248 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 108265 transitions. Word has length 56 [2021-06-12 20:31:53,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:53,248 INFO L482 AbstractCegarLoop]: Abstraction has 49354 states and 108265 transitions. [2021-06-12 20:31:53,248 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) [2021-06-12 20:31:53,248 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 108265 transitions. [2021-06-12 20:31:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:31:53,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:53,284 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:53,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:53,485 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:53,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:53,485 INFO L82 PathProgramCache]: Analyzing trace with hash -418208773, now seen corresponding path program 70 times [2021-06-12 20:31:53,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:53,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704233051] [2021-06-12 20:31:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:53,580 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:53,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:53,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704233051] [2021-06-12 20:31:53,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704233051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:53,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36475127] [2021-06-12 20:31:53,581 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 [2021-06-12 20:31:53,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:31:53,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:53,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:31:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36475127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:53,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:53,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 20:31:53,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369347117] [2021-06-12 20:31:53,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:31:53,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:31:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:31:53,710 INFO L87 Difference]: Start difference. First operand 49354 states and 108265 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) [2021-06-12 20:31:54,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:54,316 INFO L93 Difference]: Finished difference Result 55302 states and 120443 transitions. [2021-06-12 20:31:54,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:31:54,319 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 66 [2021-06-12 20:31:54,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:54,394 INFO L225 Difference]: With dead ends: 55302 [2021-06-12 20:31:54,394 INFO L226 Difference]: Without dead ends: 55302 [2021-06-12 20:31:54,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 159.0ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:31:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-06-12 20:31:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 49998. [2021-06-12 20:31:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49998 states, 49997 states have (on average 2.195831749904994) internal successors, (109785), 49997 states have internal predecessors, (109785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49998 states to 49998 states and 109785 transitions. [2021-06-12 20:31:55,197 INFO L78 Accepts]: Start accepts. Automaton has 49998 states and 109785 transitions. Word has length 66 [2021-06-12 20:31:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:55,197 INFO L482 AbstractCegarLoop]: Abstraction has 49998 states and 109785 transitions. [2021-06-12 20:31:55,197 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) [2021-06-12 20:31:55,197 INFO L276 IsEmpty]: Start isEmpty. Operand 49998 states and 109785 transitions. [2021-06-12 20:31:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:31:55,237 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:55,237 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:55,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:55,437 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:55,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:55,438 INFO L82 PathProgramCache]: Analyzing trace with hash -12185795, now seen corresponding path program 71 times [2021-06-12 20:31:55,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:55,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664655486] [2021-06-12 20:31:55,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:55,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:55,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664655486] [2021-06-12 20:31:55,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664655486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:55,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798129397] [2021-06-12 20:31:55,482 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 [2021-06-12 20:31:55,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:31:55,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:55,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:31:55,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:31:55,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798129397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:55,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:55,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:55,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619908674] [2021-06-12 20:31:55,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:55,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:55,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:55,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:55,624 INFO L87 Difference]: Start difference. First operand 49998 states and 109785 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:31:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:55,883 INFO L93 Difference]: Finished difference Result 51084 states and 111615 transitions. [2021-06-12 20:31:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:31:55,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-06-12 20:31:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:55,964 INFO L225 Difference]: With dead ends: 51084 [2021-06-12 20:31:55,964 INFO L226 Difference]: Without dead ends: 51076 [2021-06-12 20:31:55,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51076 states. [2021-06-12 20:31:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51076 to 49894. [2021-06-12 20:31:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49894 states, 49893 states have (on average 2.193995149620187) internal successors, (109465), 49893 states have internal predecessors, (109465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49894 states to 49894 states and 109465 transitions. [2021-06-12 20:31:56,953 INFO L78 Accepts]: Start accepts. Automaton has 49894 states and 109465 transitions. Word has length 66 [2021-06-12 20:31:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:56,953 INFO L482 AbstractCegarLoop]: Abstraction has 49894 states and 109465 transitions. [2021-06-12 20:31:56,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:31:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 49894 states and 109465 transitions. [2021-06-12 20:31:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:31:56,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:56,990 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:57,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:57,190 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1308699737, now seen corresponding path program 72 times [2021-06-12 20:31:57,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:57,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330001341] [2021-06-12 20:31:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:57,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:57,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330001341] [2021-06-12 20:31:57,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330001341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:57,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583748993] [2021-06-12 20:31:57,241 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 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 [2021-06-12 20:31:57,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 20:31:57,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:31:57,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:31:57,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:57,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583748993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:57,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:57,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:57,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513213706] [2021-06-12 20:31:57,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:57,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:57,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:57,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:57,375 INFO L87 Difference]: Start difference. First operand 49894 states and 109465 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:31:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:57,663 INFO L93 Difference]: Finished difference Result 58739 states and 127815 transitions. [2021-06-12 20:31:57,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:31:57,663 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-06-12 20:31:57,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:57,727 INFO L225 Difference]: With dead ends: 58739 [2021-06-12 20:31:57,728 INFO L226 Difference]: Without dead ends: 58739 [2021-06-12 20:31:57,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58739 states. [2021-06-12 20:31:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58739 to 53954. [2021-06-12 20:31:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53954 states, 53953 states have (on average 2.204678145793561) internal successors, (118949), 53953 states have internal predecessors, (118949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:31:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53954 states to 53954 states and 118949 transitions. [2021-06-12 20:31:58,712 INFO L78 Accepts]: Start accepts. Automaton has 53954 states and 118949 transitions. Word has length 66 [2021-06-12 20:31:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:31:58,712 INFO L482 AbstractCegarLoop]: Abstraction has 53954 states and 118949 transitions. [2021-06-12 20:31:58,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:31:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 53954 states and 118949 transitions. [2021-06-12 20:31:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:31:58,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:31:58,750 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:31:58,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:31:58,952 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:31:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:31:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash -138643737, now seen corresponding path program 73 times [2021-06-12 20:31:58,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:31:58,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518209093] [2021-06-12 20:31:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:31:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:59,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:31:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518209093] [2021-06-12 20:31:59,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518209093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317477541] [2021-06-12 20:31:59,014 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 [2021-06-12 20:31:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:31:59,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:31:59,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:31:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:31:59,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317477541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:31:59,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:31:59,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:31:59,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010913038] [2021-06-12 20:31:59,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:31:59,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:31:59,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:31:59,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:31:59,154 INFO L87 Difference]: Start difference. First operand 53954 states and 118949 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:31:59,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:31:59,429 INFO L93 Difference]: Finished difference Result 56467 states and 123155 transitions. [2021-06-12 20:31:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:31:59,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-06-12 20:31:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:31:59,494 INFO L225 Difference]: With dead ends: 56467 [2021-06-12 20:31:59,494 INFO L226 Difference]: Without dead ends: 56375 [2021-06-12 20:31:59,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:31:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56375 states. [2021-06-12 20:32:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56375 to 51614. [2021-06-12 20:32:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.1976827543448354) internal successors, (113429), 51613 states have internal predecessors, (113429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113429 transitions. [2021-06-12 20:32:00,422 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113429 transitions. Word has length 66 [2021-06-12 20:32:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:00,422 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113429 transitions. [2021-06-12 20:32:00,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:00,422 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113429 transitions. [2021-06-12 20:32:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:00,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:00,459 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:00,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:00,660 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:00,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:00,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1619583693, now seen corresponding path program 74 times [2021-06-12 20:32:00,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:00,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517591808] [2021-06-12 20:32:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:00,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517591808] [2021-06-12 20:32:00,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517591808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:00,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344021937] [2021-06-12 20:32:00,704 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 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 [2021-06-12 20:32:00,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:32:00,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:00,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:00,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344021937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:00,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:00,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:32:00,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817084575] [2021-06-12 20:32:00,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:32:00,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:00,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:32:00,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:32:00,818 INFO L87 Difference]: Start difference. First operand 51614 states and 113429 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-06-12 20:32:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:01,088 INFO L93 Difference]: Finished difference Result 53573 states and 116784 transitions. [2021-06-12 20:32:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:32:01,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 66 [2021-06-12 20:32:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:01,156 INFO L225 Difference]: With dead ends: 53573 [2021-06-12 20:32:01,156 INFO L226 Difference]: Without dead ends: 53525 [2021-06-12 20:32:01,156 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:32:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53525 states. [2021-06-12 20:32:01,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53525 to 51614. [2021-06-12 20:32:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.196520256524519) internal successors, (113369), 51613 states have internal predecessors, (113369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113369 transitions. [2021-06-12 20:32:02,062 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113369 transitions. Word has length 66 [2021-06-12 20:32:02,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:02,062 INFO L482 AbstractCegarLoop]: Abstraction has 51614 states and 113369 transitions. [2021-06-12 20:32:02,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-06-12 20:32:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113369 transitions. [2021-06-12 20:32:02,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:02,099 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:02,099 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:02,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:02,300 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:02,300 INFO L82 PathProgramCache]: Analyzing trace with hash -607697029, now seen corresponding path program 75 times [2021-06-12 20:32:02,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:02,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183368326] [2021-06-12 20:32:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:32:02,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:02,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183368326] [2021-06-12 20:32:02,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183368326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:02,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599423484] [2021-06-12 20:32:02,341 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 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 [2021-06-12 20:32:02,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 20:32:02,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:32:02,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599423484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:02,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:02,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:32:02,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833965016] [2021-06-12 20:32:02,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:32:02,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:02,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:32:02,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:02,456 INFO L87 Difference]: Start difference. First operand 51614 states and 113369 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-06-12 20:32:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:02,695 INFO L93 Difference]: Finished difference Result 66038 states and 143412 transitions. [2021-06-12 20:32:02,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:32:02,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 66 [2021-06-12 20:32:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:02,967 INFO L225 Difference]: With dead ends: 66038 [2021-06-12 20:32:02,967 INFO L226 Difference]: Without dead ends: 66011 [2021-06-12 20:32:02,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:32:03,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66011 states. [2021-06-12 20:32:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66011 to 55054. [2021-06-12 20:32:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55054 states, 55053 states have (on average 2.1976822334840973) internal successors, (120989), 55053 states have internal predecessors, (120989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55054 states to 55054 states and 120989 transitions. [2021-06-12 20:32:03,705 INFO L78 Accepts]: Start accepts. Automaton has 55054 states and 120989 transitions. Word has length 66 [2021-06-12 20:32:03,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:03,705 INFO L482 AbstractCegarLoop]: Abstraction has 55054 states and 120989 transitions. [2021-06-12 20:32:03,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-06-12 20:32:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 55054 states and 120989 transitions. [2021-06-12 20:32:03,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:03,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:03,742 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:03,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 20:32:03,943 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:03,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:03,943 INFO L82 PathProgramCache]: Analyzing trace with hash -321373819, now seen corresponding path program 76 times [2021-06-12 20:32:03,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:03,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939263833] [2021-06-12 20:32:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:03,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:03,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939263833] [2021-06-12 20:32:03,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939263833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:03,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281893889] [2021-06-12 20:32:03,982 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 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 [2021-06-12 20:32:04,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:32:04,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:04,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:04,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:04,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281893889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:04,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:04,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:32:04,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152531893] [2021-06-12 20:32:04,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:32:04,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:04,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:32:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:04,107 INFO L87 Difference]: Start difference. First operand 55054 states and 120989 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:04,582 INFO L93 Difference]: Finished difference Result 64613 states and 140751 transitions. [2021-06-12 20:32:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:32:04,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-06-12 20:32:04,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:04,666 INFO L225 Difference]: With dead ends: 64613 [2021-06-12 20:32:04,666 INFO L226 Difference]: Without dead ends: 64613 [2021-06-12 20:32:04,666 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:32:04,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64613 states. [2021-06-12 20:32:05,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64613 to 59214. [2021-06-12 20:32:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59214 states, 59213 states have (on average 2.2070322395419923) internal successors, (130685), 59213 states have internal predecessors, (130685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59214 states to 59214 states and 130685 transitions. [2021-06-12 20:32:05,513 INFO L78 Accepts]: Start accepts. Automaton has 59214 states and 130685 transitions. Word has length 66 [2021-06-12 20:32:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:05,513 INFO L482 AbstractCegarLoop]: Abstraction has 59214 states and 130685 transitions. [2021-06-12 20:32:05,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 59214 states and 130685 transitions. [2021-06-12 20:32:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:05,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:05,552 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:05,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:05,752 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash 848682181, now seen corresponding path program 77 times [2021-06-12 20:32:05,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:05,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876894509] [2021-06-12 20:32:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:05,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:05,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876894509] [2021-06-12 20:32:05,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876894509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:05,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331335665] [2021-06-12 20:32:05,800 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 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 [2021-06-12 20:32:05,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 20:32:05,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:05,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:05,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:06,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331335665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:06,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:06,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:32:06,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425769605] [2021-06-12 20:32:06,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:32:06,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:06,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:32:06,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:06,096 INFO L87 Difference]: Start difference. First operand 59214 states and 130685 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:06,358 INFO L93 Difference]: Finished difference Result 61966 states and 135259 transitions. [2021-06-12 20:32:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:32:06,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-06-12 20:32:06,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:06,432 INFO L225 Difference]: With dead ends: 61966 [2021-06-12 20:32:06,432 INFO L226 Difference]: Without dead ends: 61870 [2021-06-12 20:32:06,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:32:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61870 states. [2021-06-12 20:32:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61870 to 56914. [2021-06-12 20:32:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56914 states, 56913 states have (on average 2.2002178764078506) internal successors, (125221), 56913 states have internal predecessors, (125221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56914 states to 56914 states and 125221 transitions. [2021-06-12 20:32:07,493 INFO L78 Accepts]: Start accepts. Automaton has 56914 states and 125221 transitions. Word has length 66 [2021-06-12 20:32:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:07,494 INFO L482 AbstractCegarLoop]: Abstraction has 56914 states and 125221 transitions. [2021-06-12 20:32:07,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 56914 states and 125221 transitions. [2021-06-12 20:32:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:07,528 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:07,529 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:07,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 20:32:07,729 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1688057685, now seen corresponding path program 78 times [2021-06-12 20:32:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:07,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658901474] [2021-06-12 20:32:07,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:07,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:07,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:07,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658901474] [2021-06-12 20:32:07,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658901474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:07,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094741564] [2021-06-12 20:32:07,768 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 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 [2021-06-12 20:32:07,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 20:32:07,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:07,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:07,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:07,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094741564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:07,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:07,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:32:07,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518767685] [2021-06-12 20:32:07,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:32:07,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:07,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:32:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:32:07,887 INFO L87 Difference]: Start difference. First operand 56914 states and 125221 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-06-12 20:32:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:08,153 INFO L93 Difference]: Finished difference Result 59554 states and 129655 transitions. [2021-06-12 20:32:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:32:08,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 66 [2021-06-12 20:32:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:08,224 INFO L225 Difference]: With dead ends: 59554 [2021-06-12 20:32:08,224 INFO L226 Difference]: Without dead ends: 59458 [2021-06-12 20:32:08,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:32:08,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59458 states. [2021-06-12 20:32:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59458 to 56894. [2021-06-12 20:32:09,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56894 states, 56893 states have (on average 2.1983548063909444) internal successors, (125071), 56893 states have internal predecessors, (125071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:09,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56894 states to 56894 states and 125071 transitions. [2021-06-12 20:32:09,194 INFO L78 Accepts]: Start accepts. Automaton has 56894 states and 125071 transitions. Word has length 66 [2021-06-12 20:32:09,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:09,194 INFO L482 AbstractCegarLoop]: Abstraction has 56894 states and 125071 transitions. [2021-06-12 20:32:09,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-06-12 20:32:09,194 INFO L276 IsEmpty]: Start isEmpty. Operand 56894 states and 125071 transitions. [2021-06-12 20:32:09,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:09,231 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:09,231 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:09,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:09,432 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:09,432 INFO L82 PathProgramCache]: Analyzing trace with hash -326026235, now seen corresponding path program 79 times [2021-06-12 20:32:09,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:09,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208749841] [2021-06-12 20:32:09,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:09,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208749841] [2021-06-12 20:32:09,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208749841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948930780] [2021-06-12 20:32:09,485 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 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 [2021-06-12 20:32:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:09,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:09,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948930780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:09,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:09,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:32:09,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597422726] [2021-06-12 20:32:09,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:32:09,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:09,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:32:09,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:32:09,595 INFO L87 Difference]: Start difference. First operand 56894 states and 125071 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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) [2021-06-12 20:32:09,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:09,893 INFO L93 Difference]: Finished difference Result 59114 states and 128843 transitions. [2021-06-12 20:32:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:32:09,894 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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 66 [2021-06-12 20:32:09,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:09,970 INFO L225 Difference]: With dead ends: 59114 [2021-06-12 20:32:09,970 INFO L226 Difference]: Without dead ends: 58982 [2021-06-12 20:32:09,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58982 states. [2021-06-12 20:32:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58982 to 56922. [2021-06-12 20:32:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56922 states, 56921 states have (on average 2.1963950036014825) internal successors, (125021), 56921 states have internal predecessors, (125021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:10,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56922 states to 56922 states and 125021 transitions. [2021-06-12 20:32:10,978 INFO L78 Accepts]: Start accepts. Automaton has 56922 states and 125021 transitions. Word has length 66 [2021-06-12 20:32:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:10,978 INFO L482 AbstractCegarLoop]: Abstraction has 56922 states and 125021 transitions. [2021-06-12 20:32:10,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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) [2021-06-12 20:32:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 56922 states and 125021 transitions. [2021-06-12 20:32:11,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:11,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:11,015 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:11,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:11,216 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:11,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1465776773, now seen corresponding path program 80 times [2021-06-12 20:32:11,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:11,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468740471] [2021-06-12 20:32:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:32:11,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:11,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468740471] [2021-06-12 20:32:11,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468740471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:11,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947170585] [2021-06-12 20:32:11,249 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 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 [2021-06-12 20:32:11,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:32:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:11,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:11,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:32:11,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947170585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:11,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:11,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:32:11,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559934280] [2021-06-12 20:32:11,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:32:11,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:11,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:32:11,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:11,371 INFO L87 Difference]: Start difference. First operand 56922 states and 125021 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-06-12 20:32:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:11,840 INFO L93 Difference]: Finished difference Result 69297 states and 150869 transitions. [2021-06-12 20:32:11,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:32:11,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 66 [2021-06-12 20:32:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:11,934 INFO L225 Difference]: With dead ends: 69297 [2021-06-12 20:32:11,934 INFO L226 Difference]: Without dead ends: 69270 [2021-06-12 20:32:11,934 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:32:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-06-12 20:32:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 56622. [2021-06-12 20:32:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56622 states, 56621 states have (on average 2.1971529997704033) internal successors, (124405), 56621 states have internal predecessors, (124405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:12,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56622 states to 56622 states and 124405 transitions. [2021-06-12 20:32:12,722 INFO L78 Accepts]: Start accepts. Automaton has 56622 states and 124405 transitions. Word has length 66 [2021-06-12 20:32:12,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:12,722 INFO L482 AbstractCegarLoop]: Abstraction has 56622 states and 124405 transitions. [2021-06-12 20:32:12,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-06-12 20:32:12,723 INFO L276 IsEmpty]: Start isEmpty. Operand 56622 states and 124405 transitions. [2021-06-12 20:32:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:12,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:12,760 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:12,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:12,960 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash -904475993, now seen corresponding path program 81 times [2021-06-12 20:32:12,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:12,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333828604] [2021-06-12 20:32:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:12,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:12,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333828604] [2021-06-12 20:32:12,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333828604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:12,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187839979] [2021-06-12 20:32:12,994 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 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 [2021-06-12 20:32:13,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 20:32:13,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:13,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:13,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:13,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187839979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:13,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:13,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:32:13,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283356300] [2021-06-12 20:32:13,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:32:13,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:13,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:32:13,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:13,111 INFO L87 Difference]: Start difference. First operand 56622 states and 124405 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:13,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:13,526 INFO L93 Difference]: Finished difference Result 67026 states and 146165 transitions. [2021-06-12 20:32:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:32:13,527 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-06-12 20:32:13,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:13,600 INFO L225 Difference]: With dead ends: 67026 [2021-06-12 20:32:13,600 INFO L226 Difference]: Without dead ends: 67023 [2021-06-12 20:32:13,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:32:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67023 states. [2021-06-12 20:32:14,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67023 to 62354. [2021-06-12 20:32:14,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62354 states, 62353 states have (on average 2.206229050727311) internal successors, (137565), 62353 states have internal predecessors, (137565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62354 states to 62354 states and 137565 transitions. [2021-06-12 20:32:14,713 INFO L78 Accepts]: Start accepts. Automaton has 62354 states and 137565 transitions. Word has length 66 [2021-06-12 20:32:14,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:14,714 INFO L482 AbstractCegarLoop]: Abstraction has 62354 states and 137565 transitions. [2021-06-12 20:32:14,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 62354 states and 137565 transitions. [2021-06-12 20:32:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:14,755 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:14,755 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:14,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:14,979 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:14,979 INFO L82 PathProgramCache]: Analyzing trace with hash 265580007, now seen corresponding path program 82 times [2021-06-12 20:32:14,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:14,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505565103] [2021-06-12 20:32:14,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:15,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:15,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505565103] [2021-06-12 20:32:15,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505565103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:15,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843458858] [2021-06-12 20:32:15,015 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 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 [2021-06-12 20:32:15,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:32:15,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:15,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:15,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:15,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843458858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:15,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:15,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:32:15,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625334333] [2021-06-12 20:32:15,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:32:15,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:15,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:32:15,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:15,125 INFO L87 Difference]: Start difference. First operand 62354 states and 137565 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:15,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:15,369 INFO L93 Difference]: Finished difference Result 65089 states and 142128 transitions. [2021-06-12 20:32:15,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:32:15,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-06-12 20:32:15,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:15,437 INFO L225 Difference]: With dead ends: 65089 [2021-06-12 20:32:15,437 INFO L226 Difference]: Without dead ends: 65029 [2021-06-12 20:32:15,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:32:15,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65029 states. [2021-06-12 20:32:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65029 to 59590. [2021-06-12 20:32:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.20163117353874) internal successors, (131193), 59589 states have internal predecessors, (131193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131193 transitions. [2021-06-12 20:32:16,461 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131193 transitions. Word has length 66 [2021-06-12 20:32:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:16,461 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131193 transitions. [2021-06-12 20:32:16,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:16,461 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131193 transitions. [2021-06-12 20:32:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:16,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:16,498 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:16,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:16,699 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:16,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:16,700 INFO L82 PathProgramCache]: Analyzing trace with hash 2023807437, now seen corresponding path program 83 times [2021-06-12 20:32:16,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:16,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523773507] [2021-06-12 20:32:16,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:16,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523773507] [2021-06-12 20:32:16,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523773507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:16,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544647443] [2021-06-12 20:32:16,739 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 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 [2021-06-12 20:32:16,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 20:32:16,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:16,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:16,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544647443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:16,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:16,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:32:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837838489] [2021-06-12 20:32:16,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:32:16,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:16,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:32:16,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:32:16,851 INFO L87 Difference]: Start difference. First operand 59590 states and 131193 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-06-12 20:32:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:17,115 INFO L93 Difference]: Finished difference Result 62315 states and 135765 transitions. [2021-06-12 20:32:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:32:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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 66 [2021-06-12 20:32:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:17,398 INFO L225 Difference]: With dead ends: 62315 [2021-06-12 20:32:17,398 INFO L226 Difference]: Without dead ends: 62243 [2021-06-12 20:32:17,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:32:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62243 states. [2021-06-12 20:32:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62243 to 59590. [2021-06-12 20:32:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1996173790464684) internal successors, (131073), 59589 states have internal predecessors, (131073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:18,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131073 transitions. [2021-06-12 20:32:18,158 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131073 transitions. Word has length 66 [2021-06-12 20:32:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:18,159 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 131073 transitions. [2021-06-12 20:32:18,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 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) [2021-06-12 20:32:18,159 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131073 transitions. [2021-06-12 20:32:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:18,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:18,196 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:18,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:18,397 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:18,397 INFO L82 PathProgramCache]: Analyzing trace with hash -909128409, now seen corresponding path program 84 times [2021-06-12 20:32:18,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:18,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24783178] [2021-06-12 20:32:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:18,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:18,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24783178] [2021-06-12 20:32:18,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24783178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:18,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695656175] [2021-06-12 20:32:18,449 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 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 [2021-06-12 20:32:18,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 20:32:18,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:18,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695656175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:18,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:18,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:32:18,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075620566] [2021-06-12 20:32:18,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:32:18,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:18,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:32:18,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:32:18,573 INFO L87 Difference]: Start difference. First operand 59590 states and 131073 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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) [2021-06-12 20:32:19,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:19,054 INFO L93 Difference]: Finished difference Result 62467 states and 135889 transitions. [2021-06-12 20:32:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:32:19,054 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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 66 [2021-06-12 20:32:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:19,125 INFO L225 Difference]: With dead ends: 62467 [2021-06-12 20:32:19,125 INFO L226 Difference]: Without dead ends: 62335 [2021-06-12 20:32:19,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-06-12 20:32:19,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 59590. [2021-06-12 20:32:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1969323197234387) internal successors, (130913), 59589 states have internal predecessors, (130913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:20,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 130913 transitions. [2021-06-12 20:32:20,011 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 130913 transitions. Word has length 66 [2021-06-12 20:32:20,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:20,011 INFO L482 AbstractCegarLoop]: Abstraction has 59590 states and 130913 transitions. [2021-06-12 20:32:20,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 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) [2021-06-12 20:32:20,011 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 130913 transitions. [2021-06-12 20:32:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:20,269 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:20,269 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:20,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 20:32:20,470 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:20,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:20,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1791126029, now seen corresponding path program 85 times [2021-06-12 20:32:20,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:20,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440809060] [2021-06-12 20:32:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:20,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440809060] [2021-06-12 20:32:20,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440809060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:20,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296182586] [2021-06-12 20:32:20,523 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 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 [2021-06-12 20:32:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:20,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:20,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296182586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:20,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:20,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:32:20,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631791637] [2021-06-12 20:32:20,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:32:20,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:20,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:32:20,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:32:20,651 INFO L87 Difference]: Start difference. First operand 59590 states and 130913 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 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) [2021-06-12 20:32:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:20,954 INFO L93 Difference]: Finished difference Result 62011 states and 135009 transitions. [2021-06-12 20:32:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:32:20,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 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 66 [2021-06-12 20:32:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:21,030 INFO L225 Difference]: With dead ends: 62011 [2021-06-12 20:32:21,030 INFO L226 Difference]: Without dead ends: 61819 [2021-06-12 20:32:21,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:32:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61819 states. [2021-06-12 20:32:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61819 to 59670. [2021-06-12 20:32:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59670 states, 59669 states have (on average 2.193383498969314) internal successors, (130877), 59669 states have internal predecessors, (130877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59670 states to 59670 states and 130877 transitions. [2021-06-12 20:32:22,055 INFO L78 Accepts]: Start accepts. Automaton has 59670 states and 130877 transitions. Word has length 66 [2021-06-12 20:32:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:22,055 INFO L482 AbstractCegarLoop]: Abstraction has 59670 states and 130877 transitions. [2021-06-12 20:32:22,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 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) [2021-06-12 20:32:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 59670 states and 130877 transitions. [2021-06-12 20:32:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:22,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:22,090 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:22,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:22,290 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:22,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:22,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1714547269, now seen corresponding path program 86 times [2021-06-12 20:32:22,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:22,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136108512] [2021-06-12 20:32:22,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:32:22,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:22,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136108512] [2021-06-12 20:32:22,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136108512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:22,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388196266] [2021-06-12 20:32:22,337 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 [2021-06-12 20:32:22,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:32:22,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:22,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:22,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:32:22,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388196266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:22,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:22,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:32:22,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14631277] [2021-06-12 20:32:22,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:32:22,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:22,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:32:22,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:32:22,452 INFO L87 Difference]: Start difference. First operand 59670 states and 130877 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) [2021-06-12 20:32:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:22,733 INFO L93 Difference]: Finished difference Result 65831 states and 143283 transitions. [2021-06-12 20:32:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:32:22,734 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 66 [2021-06-12 20:32:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:22,807 INFO L225 Difference]: With dead ends: 65831 [2021-06-12 20:32:22,807 INFO L226 Difference]: Without dead ends: 65774 [2021-06-12 20:32:22,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65774 states. [2021-06-12 20:32:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65774 to 55516. [2021-06-12 20:32:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55516 states, 55515 states have (on average 2.1908132937044043) internal successors, (121623), 55515 states have internal predecessors, (121623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:23,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55516 states to 55516 states and 121623 transitions. [2021-06-12 20:32:23,805 INFO L78 Accepts]: Start accepts. Automaton has 55516 states and 121623 transitions. Word has length 66 [2021-06-12 20:32:23,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:23,805 INFO L482 AbstractCegarLoop]: Abstraction has 55516 states and 121623 transitions. [2021-06-12 20:32:23,805 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) [2021-06-12 20:32:23,806 INFO L276 IsEmpty]: Start isEmpty. Operand 55516 states and 121623 transitions. [2021-06-12 20:32:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:23,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:23,841 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:24,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-12 20:32:24,042 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:24,042 INFO L82 PathProgramCache]: Analyzing trace with hash 129559749, now seen corresponding path program 87 times [2021-06-12 20:32:24,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:24,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602478887] [2021-06-12 20:32:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:32:24,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602478887] [2021-06-12 20:32:24,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602478887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711505373] [2021-06-12 20:32:24,088 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 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 [2021-06-12 20:32:24,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 20:32:24,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:24,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:32:24,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711505373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:24,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:24,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:32:24,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022735367] [2021-06-12 20:32:24,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:32:24,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:24,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:32:24,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:32:24,220 INFO L87 Difference]: Start difference. First operand 55516 states and 121623 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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) [2021-06-12 20:32:24,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:24,459 INFO L93 Difference]: Finished difference Result 61581 states and 133847 transitions. [2021-06-12 20:32:24,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:32:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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 66 [2021-06-12 20:32:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:24,724 INFO L225 Difference]: With dead ends: 61581 [2021-06-12 20:32:24,724 INFO L226 Difference]: Without dead ends: 61554 [2021-06-12 20:32:24,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:32:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61554 states. [2021-06-12 20:32:25,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61554 to 54860. [2021-06-12 20:32:25,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54860 states, 54859 states have (on average 2.1912721704733955) internal successors, (120211), 54859 states have internal predecessors, (120211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:25,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54860 states to 54860 states and 120211 transitions. [2021-06-12 20:32:25,483 INFO L78 Accepts]: Start accepts. Automaton has 54860 states and 120211 transitions. Word has length 66 [2021-06-12 20:32:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:25,483 INFO L482 AbstractCegarLoop]: Abstraction has 54860 states and 120211 transitions. [2021-06-12 20:32:25,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 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) [2021-06-12 20:32:25,483 INFO L276 IsEmpty]: Start isEmpty. Operand 54860 states and 120211 transitions. [2021-06-12 20:32:25,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:25,521 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:25,521 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:25,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:25,721 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash -518473861, now seen corresponding path program 88 times [2021-06-12 20:32:25,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:25,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115005418] [2021-06-12 20:32:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:32:25,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115005418] [2021-06-12 20:32:25,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115005418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210008845] [2021-06-12 20:32:25,761 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 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 [2021-06-12 20:32:25,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:32:25,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:25,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:25,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:32:25,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210008845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:25,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:25,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:32:25,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161576279] [2021-06-12 20:32:25,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:32:25,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:25,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:32:25,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:25,896 INFO L87 Difference]: Start difference. First operand 54860 states and 120211 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-06-12 20:32:26,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:26,145 INFO L93 Difference]: Finished difference Result 62633 states and 136579 transitions. [2021-06-12 20:32:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:32:26,145 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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 66 [2021-06-12 20:32:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:26,562 INFO L225 Difference]: With dead ends: 62633 [2021-06-12 20:32:26,562 INFO L226 Difference]: Without dead ends: 62630 [2021-06-12 20:32:26,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:32:26,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62630 states. [2021-06-12 20:32:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62630 to 56940. [2021-06-12 20:32:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56940 states, 56939 states have (on average 2.195525035564376) internal successors, (125011), 56939 states have internal predecessors, (125011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56940 states to 56940 states and 125011 transitions. [2021-06-12 20:32:27,435 INFO L78 Accepts]: Start accepts. Automaton has 56940 states and 125011 transitions. Word has length 66 [2021-06-12 20:32:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:27,435 INFO L482 AbstractCegarLoop]: Abstraction has 56940 states and 125011 transitions. [2021-06-12 20:32:27,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 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) [2021-06-12 20:32:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 56940 states and 125011 transitions. [2021-06-12 20:32:27,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:27,472 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:27,472 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:27,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 20:32:27,673 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1653142277, now seen corresponding path program 89 times [2021-06-12 20:32:27,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:27,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829102174] [2021-06-12 20:32:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:27,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:27,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829102174] [2021-06-12 20:32:27,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829102174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:27,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913322731] [2021-06-12 20:32:27,713 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 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 [2021-06-12 20:32:27,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 20:32:27,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:27,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 20:32:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:27,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913322731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:27,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:27,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 20:32:27,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846065495] [2021-06-12 20:32:27,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:32:27,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:32:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:32:27,831 INFO L87 Difference]: Start difference. First operand 56940 states and 125011 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:28,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:28,082 INFO L93 Difference]: Finished difference Result 66890 states and 145747 transitions. [2021-06-12 20:32:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:32:28,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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 66 [2021-06-12 20:32:28,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:28,382 INFO L225 Difference]: With dead ends: 66890 [2021-06-12 20:32:28,382 INFO L226 Difference]: Without dead ends: 66890 [2021-06-12 20:32:28,382 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:32:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66890 states. [2021-06-12 20:32:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66890 to 62652. [2021-06-12 20:32:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62652 states, 62651 states have (on average 2.2049288917974175) internal successors, (138141), 62651 states have internal predecessors, (138141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62652 states to 62652 states and 138141 transitions. [2021-06-12 20:32:29,212 INFO L78 Accepts]: Start accepts. Automaton has 62652 states and 138141 transitions. Word has length 66 [2021-06-12 20:32:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:29,212 INFO L482 AbstractCegarLoop]: Abstraction has 62652 states and 138141 transitions. [2021-06-12 20:32:29,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 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) [2021-06-12 20:32:29,212 INFO L276 IsEmpty]: Start isEmpty. Operand 62652 states and 138141 transitions. [2021-06-12 20:32:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:29,250 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:29,250 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:29,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 20:32:29,452 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:29,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1471769019, now seen corresponding path program 90 times [2021-06-12 20:32:29,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:29,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289829404] [2021-06-12 20:32:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:29,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:29,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289829404] [2021-06-12 20:32:29,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289829404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:29,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32046363] [2021-06-12 20:32:29,486 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 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 [2021-06-12 20:32:29,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 20:32:29,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:29,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 20:32:29,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 27 proven. 74 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-12 20:32:29,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32046363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:29,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:29,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-12 20:32:29,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913736260] [2021-06-12 20:32:29,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:32:29,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:29,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:32:29,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:32:29,639 INFO L87 Difference]: Start difference. First operand 62652 states and 138141 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 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) [2021-06-12 20:32:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:31,007 INFO L93 Difference]: Finished difference Result 90468 states and 195554 transitions. [2021-06-12 20:32:31,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 20:32:31,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 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 66 [2021-06-12 20:32:31,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:31,272 INFO L225 Difference]: With dead ends: 90468 [2021-06-12 20:32:31,272 INFO L226 Difference]: Without dead ends: 90440 [2021-06-12 20:32:31,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 780.4ms TimeCoverageRelationStatistics Valid=788, Invalid=4182, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 20:32:31,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90440 states. [2021-06-12 20:32:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90440 to 64804. [2021-06-12 20:32:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2016727620634846) internal successors, (142675), 64803 states have internal predecessors, (142675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142675 transitions. [2021-06-12 20:32:32,380 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142675 transitions. Word has length 66 [2021-06-12 20:32:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:32,380 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142675 transitions. [2021-06-12 20:32:32,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 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) [2021-06-12 20:32:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142675 transitions. [2021-06-12 20:32:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:32,415 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:32,415 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:32,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 20:32:32,629 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:32,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:32,629 INFO L82 PathProgramCache]: Analyzing trace with hash 47459948, now seen corresponding path program 91 times [2021-06-12 20:32:32,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:32,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861618620] [2021-06-12 20:32:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:32,684 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:32,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:32,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861618620] [2021-06-12 20:32:32,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861618620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:32,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369934249] [2021-06-12 20:32:32,684 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 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 [2021-06-12 20:32:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:32,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:32:32,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:32,801 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-12 20:32:32,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369934249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:32,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:32,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-12 20:32:32,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111699111] [2021-06-12 20:32:32,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:32:32,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:32,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:32:32,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:32:32,802 INFO L87 Difference]: Start difference. First operand 64804 states and 142675 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 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) [2021-06-12 20:32:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:33,053 INFO L93 Difference]: Finished difference Result 71842 states and 157251 transitions. [2021-06-12 20:32:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:32:33,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 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 66 [2021-06-12 20:32:33,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:33,132 INFO L225 Difference]: With dead ends: 71842 [2021-06-12 20:32:33,132 INFO L226 Difference]: Without dead ends: 71794 [2021-06-12 20:32:33,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:32:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2021-06-12 20:32:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 64804. [2021-06-12 20:32:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2010555066895052) internal successors, (142635), 64803 states have internal predecessors, (142635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142635 transitions. [2021-06-12 20:32:34,244 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142635 transitions. Word has length 66 [2021-06-12 20:32:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:34,244 INFO L482 AbstractCegarLoop]: Abstraction has 64804 states and 142635 transitions. [2021-06-12 20:32:34,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 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) [2021-06-12 20:32:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142635 transitions. [2021-06-12 20:32:34,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:34,279 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:34,279 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:34,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:34,480 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:34,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:34,480 INFO L82 PathProgramCache]: Analyzing trace with hash -442650298, now seen corresponding path program 92 times [2021-06-12 20:32:34,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:34,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532008105] [2021-06-12 20:32:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 52 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:34,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:34,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532008105] [2021-06-12 20:32:34,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532008105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:34,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987800506] [2021-06-12 20:32:34,537 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 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 [2021-06-12 20:32:34,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:32:34,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:34,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:32:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-12 20:32:34,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987800506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:34,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:34,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-12 20:32:34,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698258486] [2021-06-12 20:32:34,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:32:34,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:34,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:32:34,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:32:34,649 INFO L87 Difference]: Start difference. First operand 64804 states and 142635 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 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) [2021-06-12 20:32:35,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:35,124 INFO L93 Difference]: Finished difference Result 72032 states and 157512 transitions. [2021-06-12 20:32:35,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:32:35,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 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 66 [2021-06-12 20:32:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:35,205 INFO L225 Difference]: With dead ends: 72032 [2021-06-12 20:32:35,205 INFO L226 Difference]: Without dead ends: 71944 [2021-06-12 20:32:35,205 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-06-12 20:32:36,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 66864. [2021-06-12 20:32:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66864 states, 66863 states have (on average 2.2050910069844307) internal successors, (147439), 66863 states have internal predecessors, (147439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66864 states to 66864 states and 147439 transitions. [2021-06-12 20:32:36,360 INFO L78 Accepts]: Start accepts. Automaton has 66864 states and 147439 transitions. Word has length 66 [2021-06-12 20:32:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:36,361 INFO L482 AbstractCegarLoop]: Abstraction has 66864 states and 147439 transitions. [2021-06-12 20:32:36,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 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) [2021-06-12 20:32:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 66864 states and 147439 transitions. [2021-06-12 20:32:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-06-12 20:32:36,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:36,399 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:36,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 20:32:36,609 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash 361914028, now seen corresponding path program 93 times [2021-06-12 20:32:36,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:36,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448345192] [2021-06-12 20:32:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:36,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:36,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448345192] [2021-06-12 20:32:36,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448345192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:36,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234350183] [2021-06-12 20:32:36,671 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 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 [2021-06-12 20:32:36,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:32:36,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:32:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-06-12 20:32:36,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234350183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:36,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:36,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-06-12 20:32:36,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64079937] [2021-06-12 20:32:36,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:32:36,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:36,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:32:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:32:36,857 INFO L87 Difference]: Start difference. First operand 66864 states and 147439 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:38,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:38,826 INFO L93 Difference]: Finished difference Result 139029 states and 299640 transitions. [2021-06-12 20:32:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-12 20:32:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-06-12 20:32:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:38,976 INFO L225 Difference]: With dead ends: 139029 [2021-06-12 20:32:38,977 INFO L226 Difference]: Without dead ends: 138261 [2021-06-12 20:32:38,977 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 905.7ms TimeCoverageRelationStatistics Valid=961, Invalid=9139, Unknown=0, NotChecked=0, Total=10100 [2021-06-12 20:32:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138261 states. [2021-06-12 20:32:40,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138261 to 102720. [2021-06-12 20:32:40,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102720 states, 102719 states have (on average 2.1767637924824035) internal successors, (223595), 102719 states have internal predecessors, (223595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102720 states to 102720 states and 223595 transitions. [2021-06-12 20:32:40,816 INFO L78 Accepts]: Start accepts. Automaton has 102720 states and 223595 transitions. Word has length 66 [2021-06-12 20:32:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:40,816 INFO L482 AbstractCegarLoop]: Abstraction has 102720 states and 223595 transitions. [2021-06-12 20:32:40,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 102720 states and 223595 transitions. [2021-06-12 20:32:40,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:32:40,888 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:40,888 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:41,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:41,089 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:41,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:41,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2025977669, now seen corresponding path program 94 times [2021-06-12 20:32:41,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:41,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115281940] [2021-06-12 20:32:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:41,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:41,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:41,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115281940] [2021-06-12 20:32:41,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115281940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:41,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137926854] [2021-06-12 20:32:41,493 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 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 [2021-06-12 20:32:41,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:32:41,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:41,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:32:41,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:41,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137926854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:41,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:41,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 20:32:41,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337984115] [2021-06-12 20:32:41,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:32:41,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:41,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:32:41,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:32:41,667 INFO L87 Difference]: Start difference. First operand 102720 states and 223595 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 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) [2021-06-12 20:32:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:42,224 INFO L93 Difference]: Finished difference Result 133769 states and 293050 transitions. [2021-06-12 20:32:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:32:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 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 76 [2021-06-12 20:32:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:42,390 INFO L225 Difference]: With dead ends: 133769 [2021-06-12 20:32:42,390 INFO L226 Difference]: Without dead ends: 133551 [2021-06-12 20:32:42,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 495.7ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:32:42,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133551 states. [2021-06-12 20:32:44,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133551 to 130358. [2021-06-12 20:32:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130358 states, 130357 states have (on average 2.1991991224099974) internal successors, (286681), 130357 states have internal predecessors, (286681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130358 states to 130358 states and 286681 transitions. [2021-06-12 20:32:44,637 INFO L78 Accepts]: Start accepts. Automaton has 130358 states and 286681 transitions. Word has length 76 [2021-06-12 20:32:44,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:44,637 INFO L482 AbstractCegarLoop]: Abstraction has 130358 states and 286681 transitions. [2021-06-12 20:32:44,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 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) [2021-06-12 20:32:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 130358 states and 286681 transitions. [2021-06-12 20:32:45,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:32:45,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:45,063 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:45,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 20:32:45,285 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:45,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1940313489, now seen corresponding path program 95 times [2021-06-12 20:32:45,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:45,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933192476] [2021-06-12 20:32:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:45,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933192476] [2021-06-12 20:32:45,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933192476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:45,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453779577] [2021-06-12 20:32:45,336 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 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 [2021-06-12 20:32:45,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 20:32:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:32:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:45,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453779577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:45,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:45,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:32:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487255789] [2021-06-12 20:32:45,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:32:45,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:45,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:32:45,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:32:45,467 INFO L87 Difference]: Start difference. First operand 130358 states and 286681 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:32:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:45,874 INFO L93 Difference]: Finished difference Result 133389 states and 291682 transitions. [2021-06-12 20:32:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:32:45,875 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-06-12 20:32:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:46,030 INFO L225 Difference]: With dead ends: 133389 [2021-06-12 20:32:46,031 INFO L226 Difference]: Without dead ends: 133389 [2021-06-12 20:32:46,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 81.9ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:32:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133389 states. [2021-06-12 20:32:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133389 to 125674. [2021-06-12 20:32:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125674 states, 125673 states have (on average 2.193892085014283) internal successors, (275713), 125673 states have internal predecessors, (275713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125674 states to 125674 states and 275713 transitions. [2021-06-12 20:32:48,300 INFO L78 Accepts]: Start accepts. Automaton has 125674 states and 275713 transitions. Word has length 76 [2021-06-12 20:32:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:48,300 INFO L482 AbstractCegarLoop]: Abstraction has 125674 states and 275713 transitions. [2021-06-12 20:32:48,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:32:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 125674 states and 275713 transitions. [2021-06-12 20:32:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:32:48,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:48,385 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:48,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:48,585 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:48,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:48,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1246228997, now seen corresponding path program 96 times [2021-06-12 20:32:48,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:48,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028347984] [2021-06-12 20:32:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:48,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:48,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028347984] [2021-06-12 20:32:48,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028347984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:48,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614101713] [2021-06-12 20:32:48,659 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 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 [2021-06-12 20:32:48,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 20:32:48,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:32:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:48,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614101713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:48,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:48,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:32:48,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876969172] [2021-06-12 20:32:48,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:32:48,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:48,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:32:48,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:32:48,814 INFO L87 Difference]: Start difference. First operand 125674 states and 275713 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:32:49,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:49,558 INFO L93 Difference]: Finished difference Result 131872 states and 288047 transitions. [2021-06-12 20:32:49,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:32:49,558 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-06-12 20:32:49,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:49,713 INFO L225 Difference]: With dead ends: 131872 [2021-06-12 20:32:49,713 INFO L226 Difference]: Without dead ends: 131866 [2021-06-12 20:32:49,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:32:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-06-12 20:32:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 128726. [2021-06-12 20:32:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128726 states, 128725 states have (on average 2.197374247426685) internal successors, (282857), 128725 states have internal predecessors, (282857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:52,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128726 states to 128726 states and 282857 transitions. [2021-06-12 20:32:52,066 INFO L78 Accepts]: Start accepts. Automaton has 128726 states and 282857 transitions. Word has length 76 [2021-06-12 20:32:52,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:52,067 INFO L482 AbstractCegarLoop]: Abstraction has 128726 states and 282857 transitions. [2021-06-12 20:32:52,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:32:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 128726 states and 282857 transitions. [2021-06-12 20:32:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:32:52,131 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:52,132 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:52,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:52,332 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:52,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:52,332 INFO L82 PathProgramCache]: Analyzing trace with hash -941503377, now seen corresponding path program 97 times [2021-06-12 20:32:52,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:52,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949827802] [2021-06-12 20:32:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:52,380 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:52,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:52,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949827802] [2021-06-12 20:32:52,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949827802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:52,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822752386] [2021-06-12 20:32:52,381 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 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 [2021-06-12 20:32:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:52,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:32:52,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:32:52,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822752386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:52,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:52,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:32:52,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980568005] [2021-06-12 20:32:52,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:32:52,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:52,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:32:52,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:32:52,551 INFO L87 Difference]: Start difference. First operand 128726 states and 282857 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:32:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:53,303 INFO L93 Difference]: Finished difference Result 134932 states and 294145 transitions. [2021-06-12 20:32:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:32:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-06-12 20:32:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:53,462 INFO L225 Difference]: With dead ends: 134932 [2021-06-12 20:32:53,462 INFO L226 Difference]: Without dead ends: 134930 [2021-06-12 20:32:53,463 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:32:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134930 states. [2021-06-12 20:32:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134930 to 128702. [2021-06-12 20:32:55,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128702 states, 128701 states have (on average 2.1954841065725983) internal successors, (282561), 128701 states have internal predecessors, (282561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128702 states to 128702 states and 282561 transitions. [2021-06-12 20:32:55,725 INFO L78 Accepts]: Start accepts. Automaton has 128702 states and 282561 transitions. Word has length 76 [2021-06-12 20:32:55,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:55,725 INFO L482 AbstractCegarLoop]: Abstraction has 128702 states and 282561 transitions. [2021-06-12 20:32:55,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:32:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 128702 states and 282561 transitions. [2021-06-12 20:32:55,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:32:55,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:55,795 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:55,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-12 20:32:55,996 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:55,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:55,996 INFO L82 PathProgramCache]: Analyzing trace with hash -551299451, now seen corresponding path program 98 times [2021-06-12 20:32:55,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:55,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344058389] [2021-06-12 20:32:55,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:56,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:56,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344058389] [2021-06-12 20:32:56,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344058389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:56,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015827174] [2021-06-12 20:32:56,042 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 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 [2021-06-12 20:32:56,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:32:56,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:56,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:32:56,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:32:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:32:56,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015827174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:56,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:32:56,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:32:56,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8619675] [2021-06-12 20:32:56,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:32:56,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:32:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:32:56,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:32:56,192 INFO L87 Difference]: Start difference. First operand 128702 states and 282561 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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) [2021-06-12 20:32:57,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:32:57,061 INFO L93 Difference]: Finished difference Result 134144 states and 292817 transitions. [2021-06-12 20:32:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:32:57,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 76 [2021-06-12 20:32:57,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:32:57,360 INFO L225 Difference]: With dead ends: 134144 [2021-06-12 20:32:57,360 INFO L226 Difference]: Without dead ends: 134142 [2021-06-12 20:32:57,360 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:32:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134142 states. [2021-06-12 20:32:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134142 to 128026. [2021-06-12 20:32:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128026 states, 128025 states have (on average 2.1946260495996874) internal successors, (280967), 128025 states have internal predecessors, (280967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:32:59,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128026 states to 128026 states and 280967 transitions. [2021-06-12 20:32:59,547 INFO L78 Accepts]: Start accepts. Automaton has 128026 states and 280967 transitions. Word has length 76 [2021-06-12 20:32:59,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:32:59,548 INFO L482 AbstractCegarLoop]: Abstraction has 128026 states and 280967 transitions. [2021-06-12 20:32:59,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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) [2021-06-12 20:32:59,548 INFO L276 IsEmpty]: Start isEmpty. Operand 128026 states and 280967 transitions. [2021-06-12 20:32:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:32:59,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:32:59,623 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:32:59,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:32:59,823 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:32:59,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:32:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1583115929, now seen corresponding path program 99 times [2021-06-12 20:32:59,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:32:59,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90805279] [2021-06-12 20:32:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:32:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:32:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:32:59,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:32:59,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90805279] [2021-06-12 20:32:59,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90805279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:32:59,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845886480] [2021-06-12 20:32:59,872 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 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 [2021-06-12 20:32:59,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 20:32:59,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:32:59,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:32:59,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:33:00,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845886480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:00,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:00,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:33:00,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955476430] [2021-06-12 20:33:00,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:33:00,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:00,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:33:00,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:33:00,372 INFO L87 Difference]: Start difference. First operand 128026 states and 280967 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-06-12 20:33:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:00,860 INFO L93 Difference]: Finished difference Result 134843 states and 294803 transitions. [2021-06-12 20:33:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:33:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-06-12 20:33:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:01,028 INFO L225 Difference]: With dead ends: 134843 [2021-06-12 20:33:01,028 INFO L226 Difference]: Without dead ends: 134807 [2021-06-12 20:33:01,029 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:33:01,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134807 states. [2021-06-12 20:33:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134807 to 131862. [2021-06-12 20:33:03,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131862 states, 131861 states have (on average 2.1977916138964515) internal successors, (289803), 131861 states have internal predecessors, (289803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131862 states to 131862 states and 289803 transitions. [2021-06-12 20:33:03,346 INFO L78 Accepts]: Start accepts. Automaton has 131862 states and 289803 transitions. Word has length 76 [2021-06-12 20:33:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:03,346 INFO L482 AbstractCegarLoop]: Abstraction has 131862 states and 289803 transitions. [2021-06-12 20:33:03,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-06-12 20:33:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 131862 states and 289803 transitions. [2021-06-12 20:33:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:03,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:03,421 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:03,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:03,621 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:03,622 INFO L82 PathProgramCache]: Analyzing trace with hash 128207611, now seen corresponding path program 100 times [2021-06-12 20:33:03,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:03,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718265177] [2021-06-12 20:33:03,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:03,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:03,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718265177] [2021-06-12 20:33:03,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718265177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:03,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222469717] [2021-06-12 20:33:03,663 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 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 [2021-06-12 20:33:03,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:33:03,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:03,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:03,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:03,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222469717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:03,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:03,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:33:03,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189879959] [2021-06-12 20:33:03,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:33:03,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:03,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:33:03,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:33:03,806 INFO L87 Difference]: Start difference. First operand 131862 states and 289803 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:04,561 INFO L93 Difference]: Finished difference Result 138462 states and 302796 transitions. [2021-06-12 20:33:04,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:33:04,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-06-12 20:33:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:04,714 INFO L225 Difference]: With dead ends: 138462 [2021-06-12 20:33:04,715 INFO L226 Difference]: Without dead ends: 138426 [2021-06-12 20:33:04,715 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:33:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138426 states. [2021-06-12 20:33:06,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138426 to 131338. [2021-06-12 20:33:06,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131338 states, 131337 states have (on average 2.1961747260863276) internal successors, (288439), 131337 states have internal predecessors, (288439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131338 states to 131338 states and 288439 transitions. [2021-06-12 20:33:07,127 INFO L78 Accepts]: Start accepts. Automaton has 131338 states and 288439 transitions. Word has length 76 [2021-06-12 20:33:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:07,127 INFO L482 AbstractCegarLoop]: Abstraction has 131338 states and 288439 transitions. [2021-06-12 20:33:07,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 131338 states and 288439 transitions. [2021-06-12 20:33:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:07,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:07,212 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:07,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 20:33:07,413 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:07,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:07,413 INFO L82 PathProgramCache]: Analyzing trace with hash 432933231, now seen corresponding path program 101 times [2021-06-12 20:33:07,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:07,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928835558] [2021-06-12 20:33:07,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:07,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:07,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928835558] [2021-06-12 20:33:07,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928835558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:07,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931973909] [2021-06-12 20:33:07,462 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 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 [2021-06-12 20:33:07,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:33:07,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:07,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:07,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:07,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931973909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:07,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:07,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:33:07,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947248817] [2021-06-12 20:33:07,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:33:07,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:07,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:33:07,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:33:07,620 INFO L87 Difference]: Start difference. First operand 131338 states and 288439 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:08,409 INFO L93 Difference]: Finished difference Result 140394 states and 305750 transitions. [2021-06-12 20:33:08,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:33:08,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-06-12 20:33:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:08,584 INFO L225 Difference]: With dead ends: 140394 [2021-06-12 20:33:08,585 INFO L226 Difference]: Without dead ends: 140392 [2021-06-12 20:33:08,585 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:33:08,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140392 states. [2021-06-12 20:33:10,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140392 to 131550. [2021-06-12 20:33:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131550 states, 131549 states have (on average 2.1950679974762255) internal successors, (288759), 131549 states have internal predecessors, (288759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131550 states to 131550 states and 288759 transitions. [2021-06-12 20:33:10,971 INFO L78 Accepts]: Start accepts. Automaton has 131550 states and 288759 transitions. Word has length 76 [2021-06-12 20:33:10,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:10,971 INFO L482 AbstractCegarLoop]: Abstraction has 131550 states and 288759 transitions. [2021-06-12 20:33:10,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 131550 states and 288759 transitions. [2021-06-12 20:33:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:11,038 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:11,038 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:11,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 20:33:11,239 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash 823137157, now seen corresponding path program 102 times [2021-06-12 20:33:11,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:11,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951100164] [2021-06-12 20:33:11,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:11,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951100164] [2021-06-12 20:33:11,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951100164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193095039] [2021-06-12 20:33:11,283 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 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 [2021-06-12 20:33:11,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 20:33:11,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:11,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:11,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193095039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:11,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:11,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:33:11,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616291110] [2021-06-12 20:33:11,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:33:11,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:11,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:33:11,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:33:11,409 INFO L87 Difference]: Start difference. First operand 131550 states and 288759 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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) [2021-06-12 20:33:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:12,198 INFO L93 Difference]: Finished difference Result 148818 states and 323300 transitions. [2021-06-12 20:33:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:33:12,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 76 [2021-06-12 20:33:12,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:12,390 INFO L225 Difference]: With dead ends: 148818 [2021-06-12 20:33:12,390 INFO L226 Difference]: Without dead ends: 148800 [2021-06-12 20:33:12,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:33:12,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148800 states. [2021-06-12 20:33:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148800 to 131506. [2021-06-12 20:33:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131506 states, 131505 states have (on average 2.19297365119197) internal successors, (288387), 131505 states have internal predecessors, (288387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:14,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131506 states to 131506 states and 288387 transitions. [2021-06-12 20:33:14,742 INFO L78 Accepts]: Start accepts. Automaton has 131506 states and 288387 transitions. Word has length 76 [2021-06-12 20:33:14,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:14,742 INFO L482 AbstractCegarLoop]: Abstraction has 131506 states and 288387 transitions. [2021-06-12 20:33:14,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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) [2021-06-12 20:33:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 131506 states and 288387 transitions. [2021-06-12 20:33:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:14,816 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:14,816 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:15,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 20:33:15,017 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2018965209, now seen corresponding path program 103 times [2021-06-12 20:33:15,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:15,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50750350] [2021-06-12 20:33:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:15,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:15,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50750350] [2021-06-12 20:33:15,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50750350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:15,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226207712] [2021-06-12 20:33:15,068 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 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 [2021-06-12 20:33:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:15,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:15,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:15,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226207712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:15,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:15,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:33:15,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196311705] [2021-06-12 20:33:15,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:33:15,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:33:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:33:15,193 INFO L87 Difference]: Start difference. First operand 131506 states and 288387 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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) [2021-06-12 20:33:15,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:15,970 INFO L93 Difference]: Finished difference Result 138086 states and 301358 transitions. [2021-06-12 20:33:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:33:15,971 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 76 [2021-06-12 20:33:15,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:16,124 INFO L225 Difference]: With dead ends: 138086 [2021-06-12 20:33:16,124 INFO L226 Difference]: Without dead ends: 138068 [2021-06-12 20:33:16,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:33:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138068 states. [2021-06-12 20:33:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138068 to 129102. [2021-06-12 20:33:17,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129102 states, 129101 states have (on average 2.1923222902998427) internal successors, (283031), 129101 states have internal predecessors, (283031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129102 states to 129102 states and 283031 transitions. [2021-06-12 20:33:18,435 INFO L78 Accepts]: Start accepts. Automaton has 129102 states and 283031 transitions. Word has length 76 [2021-06-12 20:33:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:18,435 INFO L482 AbstractCegarLoop]: Abstraction has 129102 states and 283031 transitions. [2021-06-12 20:33:18,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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) [2021-06-12 20:33:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 129102 states and 283031 transitions. [2021-06-12 20:33:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:18,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:18,503 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:18,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:18,703 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:18,703 INFO L82 PathProgramCache]: Analyzing trace with hash 974502341, now seen corresponding path program 104 times [2021-06-12 20:33:18,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:18,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229561598] [2021-06-12 20:33:18,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:33:18,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:18,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229561598] [2021-06-12 20:33:18,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229561598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:18,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708537052] [2021-06-12 20:33:18,762 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 [2021-06-12 20:33:18,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:33:18,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:18,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:33:18,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708537052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:18,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:18,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:33:18,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607558675] [2021-06-12 20:33:18,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:33:18,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:18,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:33:18,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:33:18,905 INFO L87 Difference]: Start difference. First operand 129102 states and 283031 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-06-12 20:33:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:19,734 INFO L93 Difference]: Finished difference Result 135547 states and 296050 transitions. [2021-06-12 20:33:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:33:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-06-12 20:33:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:19,907 INFO L225 Difference]: With dead ends: 135547 [2021-06-12 20:33:19,907 INFO L226 Difference]: Without dead ends: 135511 [2021-06-12 20:33:19,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:33:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135511 states. [2021-06-12 20:33:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135511 to 132734. [2021-06-12 20:33:21,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132734 states, 132733 states have (on average 2.194322436771564) internal successors, (291259), 132733 states have internal predecessors, (291259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132734 states to 132734 states and 291259 transitions. [2021-06-12 20:33:22,146 INFO L78 Accepts]: Start accepts. Automaton has 132734 states and 291259 transitions. Word has length 76 [2021-06-12 20:33:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:22,146 INFO L482 AbstractCegarLoop]: Abstraction has 132734 states and 291259 transitions. [2021-06-12 20:33:22,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-06-12 20:33:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 132734 states and 291259 transitions. [2021-06-12 20:33:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:22,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:22,454 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:22,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 20:33:22,678 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:22,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:22,678 INFO L82 PathProgramCache]: Analyzing trace with hash -14993925, now seen corresponding path program 105 times [2021-06-12 20:33:22,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:22,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509234254] [2021-06-12 20:33:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:22,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:22,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509234254] [2021-06-12 20:33:22,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509234254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:22,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953830254] [2021-06-12 20:33:22,764 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 [2021-06-12 20:33:22,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 20:33:22,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:22,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:23,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953830254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:23,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:23,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:33:23,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090440690] [2021-06-12 20:33:23,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:33:23,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:23,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:33:23,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:33:23,038 INFO L87 Difference]: Start difference. First operand 132734 states and 291259 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:23,628 INFO L93 Difference]: Finished difference Result 139258 states and 304121 transitions. [2021-06-12 20:33:23,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:33:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-06-12 20:33:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:23,832 INFO L225 Difference]: With dead ends: 139258 [2021-06-12 20:33:23,832 INFO L226 Difference]: Without dead ends: 139216 [2021-06-12 20:33:23,832 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:33:24,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139216 states. [2021-06-12 20:33:25,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139216 to 132450. [2021-06-12 20:33:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132450 states, 132449 states have (on average 2.193168691345348) internal successors, (290483), 132449 states have internal predecessors, (290483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132450 states to 132450 states and 290483 transitions. [2021-06-12 20:33:26,056 INFO L78 Accepts]: Start accepts. Automaton has 132450 states and 290483 transitions. Word has length 76 [2021-06-12 20:33:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:26,056 INFO L482 AbstractCegarLoop]: Abstraction has 132450 states and 290483 transitions. [2021-06-12 20:33:26,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 132450 states and 290483 transitions. [2021-06-12 20:33:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:26,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:26,135 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:26,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 20:33:26,336 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:26,336 INFO L82 PathProgramCache]: Analyzing trace with hash 289731695, now seen corresponding path program 106 times [2021-06-12 20:33:26,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:26,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713185951] [2021-06-12 20:33:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:26,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713185951] [2021-06-12 20:33:26,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713185951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:26,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776781611] [2021-06-12 20:33:26,375 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 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 [2021-06-12 20:33:26,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:33:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:26,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776781611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:26,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:26,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:33:26,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954002708] [2021-06-12 20:33:26,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:33:26,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:26,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:33:26,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:33:26,902 INFO L87 Difference]: Start difference. First operand 132450 states and 290483 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:27,318 INFO L93 Difference]: Finished difference Result 142694 states and 310513 transitions. [2021-06-12 20:33:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:33:27,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-06-12 20:33:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:27,490 INFO L225 Difference]: With dead ends: 142694 [2021-06-12 20:33:27,490 INFO L226 Difference]: Without dead ends: 142692 [2021-06-12 20:33:27,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:33:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142692 states. [2021-06-12 20:33:29,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142692 to 132698. [2021-06-12 20:33:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132698 states, 132697 states have (on average 2.1928076746271583) internal successors, (290979), 132697 states have internal predecessors, (290979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132698 states to 132698 states and 290979 transitions. [2021-06-12 20:33:29,783 INFO L78 Accepts]: Start accepts. Automaton has 132698 states and 290979 transitions. Word has length 76 [2021-06-12 20:33:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:29,783 INFO L482 AbstractCegarLoop]: Abstraction has 132698 states and 290979 transitions. [2021-06-12 20:33:29,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 132698 states and 290979 transitions. [2021-06-12 20:33:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:29,860 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:29,860 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:30,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 20:33:30,065 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:30,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:30,065 INFO L82 PathProgramCache]: Analyzing trace with hash 679935621, now seen corresponding path program 107 times [2021-06-12 20:33:30,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:30,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134335528] [2021-06-12 20:33:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:30,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134335528] [2021-06-12 20:33:30,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134335528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:30,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205190353] [2021-06-12 20:33:30,110 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 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 [2021-06-12 20:33:30,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 20:33:30,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:30,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:30,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:30,553 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-12 20:33:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:30,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205190353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:30,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:30,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:33:30,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019679757] [2021-06-12 20:33:30,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:33:30,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:30,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:33:30,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:33:30,621 INFO L87 Difference]: Start difference. First operand 132698 states and 290979 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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) [2021-06-12 20:33:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:31,102 INFO L93 Difference]: Finished difference Result 159426 states and 345883 transitions. [2021-06-12 20:33:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:33:31,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 76 [2021-06-12 20:33:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:31,288 INFO L225 Difference]: With dead ends: 159426 [2021-06-12 20:33:31,288 INFO L226 Difference]: Without dead ends: 159408 [2021-06-12 20:33:31,288 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:33:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159408 states. [2021-06-12 20:33:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159408 to 133538. [2021-06-12 20:33:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133538 states, 133537 states have (on average 2.1909957539857867) internal successors, (292579), 133537 states have internal predecessors, (292579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133538 states to 133538 states and 292579 transitions. [2021-06-12 20:33:33,693 INFO L78 Accepts]: Start accepts. Automaton has 133538 states and 292579 transitions. Word has length 76 [2021-06-12 20:33:33,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:33,693 INFO L482 AbstractCegarLoop]: Abstraction has 133538 states and 292579 transitions. [2021-06-12 20:33:33,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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) [2021-06-12 20:33:33,693 INFO L276 IsEmpty]: Start isEmpty. Operand 133538 states and 292579 transitions. [2021-06-12 20:33:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:33,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:33,780 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:33,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:33,980 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:33,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:33,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2132800551, now seen corresponding path program 108 times [2021-06-12 20:33:33,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:33,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426839208] [2021-06-12 20:33:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:33,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:34,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:34,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426839208] [2021-06-12 20:33:34,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426839208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:34,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270188438] [2021-06-12 20:33:34,033 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 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 [2021-06-12 20:33:34,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 20:33:34,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:34,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:34,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270188438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:34,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:34,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:33:34,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749182973] [2021-06-12 20:33:34,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:33:34,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:34,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:33:34,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:33:34,569 INFO L87 Difference]: Start difference. First operand 133538 states and 292579 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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) [2021-06-12 20:33:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:35,047 INFO L93 Difference]: Finished difference Result 154174 states and 334665 transitions. [2021-06-12 20:33:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:33:35,047 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 76 [2021-06-12 20:33:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:35,222 INFO L225 Difference]: With dead ends: 154174 [2021-06-12 20:33:35,222 INFO L226 Difference]: Without dead ends: 154136 [2021-06-12 20:33:35,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:33:35,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154136 states. [2021-06-12 20:33:37,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154136 to 133478. [2021-06-12 20:33:37,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133478 states, 133477 states have (on average 2.1892535792683385) internal successors, (292215), 133477 states have internal predecessors, (292215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133478 states to 133478 states and 292215 transitions. [2021-06-12 20:33:37,549 INFO L78 Accepts]: Start accepts. Automaton has 133478 states and 292215 transitions. Word has length 76 [2021-06-12 20:33:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:37,549 INFO L482 AbstractCegarLoop]: Abstraction has 133478 states and 292215 transitions. [2021-06-12 20:33:37,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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) [2021-06-12 20:33:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 133478 states and 292215 transitions. [2021-06-12 20:33:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:37,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:37,628 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:37,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:37,828 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash 271329285, now seen corresponding path program 109 times [2021-06-12 20:33:37,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:37,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095265341] [2021-06-12 20:33:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:37,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:37,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:37,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095265341] [2021-06-12 20:33:37,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095265341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:37,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540099216] [2021-06-12 20:33:37,900 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 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 [2021-06-12 20:33:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:38,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:38,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:33:38,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540099216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:38,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:38,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 20:33:38,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757150165] [2021-06-12 20:33:38,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:33:38,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:38,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:33:38,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:33:38,418 INFO L87 Difference]: Start difference. First operand 133478 states and 292215 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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) [2021-06-12 20:33:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:38,902 INFO L93 Difference]: Finished difference Result 139982 states and 305517 transitions. [2021-06-12 20:33:38,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:33:38,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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 76 [2021-06-12 20:33:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:39,071 INFO L225 Difference]: With dead ends: 139982 [2021-06-12 20:33:39,071 INFO L226 Difference]: Without dead ends: 139944 [2021-06-12 20:33:39,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:33:39,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139944 states. [2021-06-12 20:33:40,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139944 to 129634. [2021-06-12 20:33:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129634 states, 129633 states have (on average 2.1887250931475783) internal successors, (283731), 129633 states have internal predecessors, (283731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:41,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129634 states to 129634 states and 283731 transitions. [2021-06-12 20:33:41,312 INFO L78 Accepts]: Start accepts. Automaton has 129634 states and 283731 transitions. Word has length 76 [2021-06-12 20:33:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:41,312 INFO L482 AbstractCegarLoop]: Abstraction has 129634 states and 283731 transitions. [2021-06-12 20:33:41,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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) [2021-06-12 20:33:41,312 INFO L276 IsEmpty]: Start isEmpty. Operand 129634 states and 283731 transitions. [2021-06-12 20:33:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:41,382 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:41,382 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:41,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:33:41,582 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1903347815, now seen corresponding path program 110 times [2021-06-12 20:33:41,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:41,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084747136] [2021-06-12 20:33:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:33:41,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:41,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084747136] [2021-06-12 20:33:41,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084747136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:41,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295326499] [2021-06-12 20:33:41,628 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 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 [2021-06-12 20:33:41,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:33:41,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:41,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:41,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:33:41,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295326499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:41,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:41,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:33:41,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93430430] [2021-06-12 20:33:41,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:33:41,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:41,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:33:41,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:33:41,750 INFO L87 Difference]: Start difference. First operand 129634 states and 283731 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-06-12 20:33:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:42,474 INFO L93 Difference]: Finished difference Result 135321 states and 295193 transitions. [2021-06-12 20:33:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 20:33:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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 76 [2021-06-12 20:33:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:42,642 INFO L225 Difference]: With dead ends: 135321 [2021-06-12 20:33:42,642 INFO L226 Difference]: Without dead ends: 135249 [2021-06-12 20:33:42,642 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:33:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135249 states. [2021-06-12 20:33:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135249 to 123270. [2021-06-12 20:33:44,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123270 states, 123269 states have (on average 2.185910488443972) internal successors, (269455), 123269 states have internal predecessors, (269455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123270 states to 123270 states and 269455 transitions. [2021-06-12 20:33:44,505 INFO L78 Accepts]: Start accepts. Automaton has 123270 states and 269455 transitions. Word has length 76 [2021-06-12 20:33:44,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:44,505 INFO L482 AbstractCegarLoop]: Abstraction has 123270 states and 269455 transitions. [2021-06-12 20:33:44,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 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) [2021-06-12 20:33:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 123270 states and 269455 transitions. [2021-06-12 20:33:45,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:45,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:45,064 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:45,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 20:33:45,286 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:45,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1486828283, now seen corresponding path program 111 times [2021-06-12 20:33:45,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:45,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446673037] [2021-06-12 20:33:45,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:45,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:45,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446673037] [2021-06-12 20:33:45,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446673037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:45,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460672013] [2021-06-12 20:33:45,342 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 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 [2021-06-12 20:33:45,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 20:33:45,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:45,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:45,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:45,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460672013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:45,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:45,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:33:45,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789237823] [2021-06-12 20:33:45,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:33:45,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:45,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:33:45,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:33:45,503 INFO L87 Difference]: Start difference. First operand 123270 states and 269455 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:46,038 INFO L93 Difference]: Finished difference Result 128955 states and 280766 transitions. [2021-06-12 20:33:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:33:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-06-12 20:33:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:46,225 INFO L225 Difference]: With dead ends: 128955 [2021-06-12 20:33:46,225 INFO L226 Difference]: Without dead ends: 128913 [2021-06-12 20:33:46,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:33:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128913 states. [2021-06-12 20:33:47,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128913 to 122990. [2021-06-12 20:33:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122990 states, 122989 states have (on average 2.185553179552643) internal successors, (268799), 122989 states have internal predecessors, (268799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122990 states to 122990 states and 268799 transitions. [2021-06-12 20:33:48,413 INFO L78 Accepts]: Start accepts. Automaton has 122990 states and 268799 transitions. Word has length 76 [2021-06-12 20:33:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:48,414 INFO L482 AbstractCegarLoop]: Abstraction has 122990 states and 268799 transitions. [2021-06-12 20:33:48,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 122990 states and 268799 transitions. [2021-06-12 20:33:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:48,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:48,487 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:48,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-12 20:33:48,687 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:48,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:48,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1791553903, now seen corresponding path program 112 times [2021-06-12 20:33:48,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:48,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558472621] [2021-06-12 20:33:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:48,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:48,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558472621] [2021-06-12 20:33:48,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558472621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:48,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262237859] [2021-06-12 20:33:48,740 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 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 [2021-06-12 20:33:48,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:33:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:48,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:48,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262237859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:48,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:48,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:33:48,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220324267] [2021-06-12 20:33:48,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:33:48,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:33:48,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:33:48,882 INFO L87 Difference]: Start difference. First operand 122990 states and 268799 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:49,601 INFO L93 Difference]: Finished difference Result 130997 states and 284211 transitions. [2021-06-12 20:33:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:33:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 76 [2021-06-12 20:33:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:49,741 INFO L225 Difference]: With dead ends: 130997 [2021-06-12 20:33:49,742 INFO L226 Difference]: Without dead ends: 130997 [2021-06-12 20:33:49,742 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:33:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130997 states. [2021-06-12 20:33:51,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130997 to 123134. [2021-06-12 20:33:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123134 states, 123133 states have (on average 2.1853036960035084) internal successors, (269083), 123133 states have internal predecessors, (269083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:51,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123134 states to 123134 states and 269083 transitions. [2021-06-12 20:33:51,589 INFO L78 Accepts]: Start accepts. Automaton has 123134 states and 269083 transitions. Word has length 76 [2021-06-12 20:33:51,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:51,589 INFO L482 AbstractCegarLoop]: Abstraction has 123134 states and 269083 transitions. [2021-06-12 20:33:51,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:33:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 123134 states and 269083 transitions. [2021-06-12 20:33:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:51,654 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:51,655 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:51,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 20:33:51,855 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:51,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:51,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2113209467, now seen corresponding path program 113 times [2021-06-12 20:33:51,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:51,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731307573] [2021-06-12 20:33:51,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:51,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:51,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731307573] [2021-06-12 20:33:51,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731307573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:51,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601011093] [2021-06-12 20:33:51,908 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 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 [2021-06-12 20:33:51,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 20:33:51,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:51,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:52,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601011093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:52,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:52,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:33:52,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136282194] [2021-06-12 20:33:52,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:33:52,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:33:52,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:33:52,055 INFO L87 Difference]: Start difference. First operand 123134 states and 269083 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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) [2021-06-12 20:33:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:52,819 INFO L93 Difference]: Finished difference Result 145897 states and 315475 transitions. [2021-06-12 20:33:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:33:52,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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 76 [2021-06-12 20:33:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:52,987 INFO L225 Difference]: With dead ends: 145897 [2021-06-12 20:33:52,987 INFO L226 Difference]: Without dead ends: 145897 [2021-06-12 20:33:52,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:33:53,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145897 states. [2021-06-12 20:33:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145897 to 123934. [2021-06-12 20:33:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123934 states, 123933 states have (on average 2.184720776548619) internal successors, (270759), 123933 states have internal predecessors, (270759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:55,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123934 states to 123934 states and 270759 transitions. [2021-06-12 20:33:55,173 INFO L78 Accepts]: Start accepts. Automaton has 123934 states and 270759 transitions. Word has length 76 [2021-06-12 20:33:55,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:55,173 INFO L482 AbstractCegarLoop]: Abstraction has 123934 states and 270759 transitions. [2021-06-12 20:33:55,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 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) [2021-06-12 20:33:55,173 INFO L276 IsEmpty]: Start isEmpty. Operand 123934 states and 270759 transitions. [2021-06-12 20:33:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:55,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:55,272 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:55,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 20:33:55,473 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:55,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:55,473 INFO L82 PathProgramCache]: Analyzing trace with hash -660344537, now seen corresponding path program 114 times [2021-06-12 20:33:55,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:55,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721432668] [2021-06-12 20:33:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:55,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:55,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721432668] [2021-06-12 20:33:55,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721432668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:55,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336377888] [2021-06-12 20:33:55,521 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 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 [2021-06-12 20:33:55,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 20:33:55,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:33:55,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:55,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:55,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336377888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:55,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:55,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:33:55,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556693027] [2021-06-12 20:33:55,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:33:55,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:33:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:33:55,647 INFO L87 Difference]: Start difference. First operand 123934 states and 270759 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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) [2021-06-12 20:33:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:56,118 INFO L93 Difference]: Finished difference Result 146309 states and 316555 transitions. [2021-06-12 20:33:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:33:56,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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 76 [2021-06-12 20:33:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:56,566 INFO L225 Difference]: With dead ends: 146309 [2021-06-12 20:33:56,566 INFO L226 Difference]: Without dead ends: 146309 [2021-06-12 20:33:56,566 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:33:56,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146309 states. [2021-06-12 20:33:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146309 to 124414. [2021-06-12 20:33:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124414 states, 124413 states have (on average 2.1839438000852) internal successors, (271711), 124413 states have internal predecessors, (271711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:33:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124414 states to 124414 states and 271711 transitions. [2021-06-12 20:33:58,416 INFO L78 Accepts]: Start accepts. Automaton has 124414 states and 271711 transitions. Word has length 76 [2021-06-12 20:33:58,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:33:58,416 INFO L482 AbstractCegarLoop]: Abstraction has 124414 states and 271711 transitions. [2021-06-12 20:33:58,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 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) [2021-06-12 20:33:58,416 INFO L276 IsEmpty]: Start isEmpty. Operand 124414 states and 271711 transitions. [2021-06-12 20:33:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:33:58,485 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:33:58,485 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:33:58,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 20:33:58,689 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:33:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:33:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1773151493, now seen corresponding path program 115 times [2021-06-12 20:33:58,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:33:58,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869195331] [2021-06-12 20:33:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:33:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:58,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:33:58,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869195331] [2021-06-12 20:33:58,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869195331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:58,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888864766] [2021-06-12 20:33:58,749 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 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 [2021-06-12 20:33:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:33:58,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:33:58,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:33:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:33:58,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888864766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:33:58,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:33:58,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 20:33:58,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072421310] [2021-06-12 20:33:58,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:33:58,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:33:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:33:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:33:58,904 INFO L87 Difference]: Start difference. First operand 124414 states and 271711 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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) [2021-06-12 20:33:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:33:59,705 INFO L93 Difference]: Finished difference Result 138029 states and 299093 transitions. [2021-06-12 20:33:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:33:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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 76 [2021-06-12 20:33:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:33:59,871 INFO L225 Difference]: With dead ends: 138029 [2021-06-12 20:33:59,871 INFO L226 Difference]: Without dead ends: 138029 [2021-06-12 20:33:59,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:34:00,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138029 states. [2021-06-12 20:34:01,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138029 to 123854. [2021-06-12 20:34:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123854 states, 123853 states have (on average 2.1827085335034275) internal successors, (270335), 123853 states have internal predecessors, (270335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123854 states to 123854 states and 270335 transitions. [2021-06-12 20:34:01,847 INFO L78 Accepts]: Start accepts. Automaton has 123854 states and 270335 transitions. Word has length 76 [2021-06-12 20:34:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:01,847 INFO L482 AbstractCegarLoop]: Abstraction has 123854 states and 270335 transitions. [2021-06-12 20:34:01,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 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) [2021-06-12 20:34:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 123854 states and 270335 transitions. [2021-06-12 20:34:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:34:02,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:02,292 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:02,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:02,494 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:02,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2048129063, now seen corresponding path program 116 times [2021-06-12 20:34:02,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:02,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499561972] [2021-06-12 20:34:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:02,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:02,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499561972] [2021-06-12 20:34:02,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499561972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:02,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407085729] [2021-06-12 20:34:02,558 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 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 [2021-06-12 20:34:02,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:02,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:02,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:34:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:02,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407085729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:02,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:02,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 20:34:02,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153839091] [2021-06-12 20:34:02,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:34:02,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:02,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:34:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:34:02,690 INFO L87 Difference]: Start difference. First operand 123854 states and 270335 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 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) [2021-06-12 20:34:03,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:03,146 INFO L93 Difference]: Finished difference Result 128519 states and 279224 transitions. [2021-06-12 20:34:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:34:03,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 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 76 [2021-06-12 20:34:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:03,608 INFO L225 Difference]: With dead ends: 128519 [2021-06-12 20:34:03,608 INFO L226 Difference]: Without dead ends: 128519 [2021-06-12 20:34:03,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:34:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128519 states. [2021-06-12 20:34:04,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128519 to 117206. [2021-06-12 20:34:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117206 states, 117205 states have (on average 2.179659570837422) internal successors, (255467), 117205 states have internal predecessors, (255467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:05,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117206 states to 117206 states and 255467 transitions. [2021-06-12 20:34:05,384 INFO L78 Accepts]: Start accepts. Automaton has 117206 states and 255467 transitions. Word has length 76 [2021-06-12 20:34:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:05,384 INFO L482 AbstractCegarLoop]: Abstraction has 117206 states and 255467 transitions. [2021-06-12 20:34:05,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 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) [2021-06-12 20:34:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 117206 states and 255467 transitions. [2021-06-12 20:34:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:34:05,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:05,445 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:05,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 20:34:05,649 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:05,649 INFO L82 PathProgramCache]: Analyzing trace with hash -358200709, now seen corresponding path program 117 times [2021-06-12 20:34:05,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:05,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013767348] [2021-06-12 20:34:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:34:05,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:05,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013767348] [2021-06-12 20:34:05,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013767348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:05,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533544508] [2021-06-12 20:34:05,707 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 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 [2021-06-12 20:34:05,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 20:34:05,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:34:05,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:05,835 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:34:05,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533544508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:05,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:05,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 20:34:05,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890899130] [2021-06-12 20:34:05,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:34:05,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:34:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:34:05,836 INFO L87 Difference]: Start difference. First operand 117206 states and 255467 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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) [2021-06-12 20:34:06,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:06,621 INFO L93 Difference]: Finished difference Result 128191 states and 279004 transitions. [2021-06-12 20:34:06,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:34:06,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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 76 [2021-06-12 20:34:06,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:06,904 INFO L225 Difference]: With dead ends: 128191 [2021-06-12 20:34:06,904 INFO L226 Difference]: Without dead ends: 128065 [2021-06-12 20:34:06,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:34:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128065 states. [2021-06-12 20:34:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128065 to 122126. [2021-06-12 20:34:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.1861780962128967) internal successors, (266987), 122125 states have internal predecessors, (266987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266987 transitions. [2021-06-12 20:34:09,018 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266987 transitions. Word has length 76 [2021-06-12 20:34:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:09,018 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266987 transitions. [2021-06-12 20:34:09,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 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) [2021-06-12 20:34:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266987 transitions. [2021-06-12 20:34:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:34:09,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:09,081 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:09,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 20:34:09,281 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:09,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1595890949, now seen corresponding path program 118 times [2021-06-12 20:34:09,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:09,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630455443] [2021-06-12 20:34:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:34:09,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:09,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630455443] [2021-06-12 20:34:09,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630455443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:09,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582817231] [2021-06-12 20:34:09,333 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 [2021-06-12 20:34:09,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:34:09,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:09,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:34:09,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:34:09,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582817231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:09,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:09,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:34:09,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624229097] [2021-06-12 20:34:09,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:09,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:09,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:09,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:09,454 INFO L87 Difference]: Start difference. First operand 122126 states and 266987 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 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) [2021-06-12 20:34:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:10,203 INFO L93 Difference]: Finished difference Result 124343 states and 270490 transitions. [2021-06-12 20:34:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:34:10,203 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 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 76 [2021-06-12 20:34:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:10,340 INFO L225 Difference]: With dead ends: 124343 [2021-06-12 20:34:10,340 INFO L226 Difference]: Without dead ends: 124247 [2021-06-12 20:34:10,341 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:34:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124247 states. [2021-06-12 20:34:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124247 to 122126. [2021-06-12 20:34:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185523029682702) internal successors, (266907), 122125 states have internal predecessors, (266907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266907 transitions. [2021-06-12 20:34:12,195 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266907 transitions. Word has length 76 [2021-06-12 20:34:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:12,195 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266907 transitions. [2021-06-12 20:34:12,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 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) [2021-06-12 20:34:12,195 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266907 transitions. [2021-06-12 20:34:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:34:12,273 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:12,273 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:12,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:12,476 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1654539205, now seen corresponding path program 119 times [2021-06-12 20:34:12,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:12,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043296887] [2021-06-12 20:34:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:34:12,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:12,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043296887] [2021-06-12 20:34:12,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043296887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:12,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783362813] [2021-06-12 20:34:12,519 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 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 [2021-06-12 20:34:12,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 20:34:12,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:34:12,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-12 20:34:12,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783362813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:12,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:12,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:34:12,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647685979] [2021-06-12 20:34:12,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:34:12,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:12,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:34:12,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:34:12,969 INFO L87 Difference]: Start difference. First operand 122126 states and 266907 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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) [2021-06-12 20:34:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:13,398 INFO L93 Difference]: Finished difference Result 123893 states and 269670 transitions. [2021-06-12 20:34:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:34:13,398 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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 76 [2021-06-12 20:34:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:13,545 INFO L225 Difference]: With dead ends: 123893 [2021-06-12 20:34:13,545 INFO L226 Difference]: Without dead ends: 123827 [2021-06-12 20:34:13,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:34:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123827 states. [2021-06-12 20:34:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123827 to 122126. [2021-06-12 20:34:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185195496417605) internal successors, (266867), 122125 states have internal predecessors, (266867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266867 transitions. [2021-06-12 20:34:15,445 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266867 transitions. Word has length 76 [2021-06-12 20:34:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:15,446 INFO L482 AbstractCegarLoop]: Abstraction has 122126 states and 266867 transitions. [2021-06-12 20:34:15,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 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) [2021-06-12 20:34:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266867 transitions. [2021-06-12 20:34:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:34:15,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:15,820 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:16,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:16,044 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash 189567813, now seen corresponding path program 120 times [2021-06-12 20:34:16,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:16,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810298451] [2021-06-12 20:34:16,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:34:16,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810298451] [2021-06-12 20:34:16,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810298451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:16,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003722238] [2021-06-12 20:34:16,087 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 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 [2021-06-12 20:34:16,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 20:34:16,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:16,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 20:34:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-06-12 20:34:16,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003722238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:16,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:16,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-12 20:34:16,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700376471] [2021-06-12 20:34:16,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:34:16,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:16,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:34:16,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:34:16,273 INFO L87 Difference]: Start difference. First operand 122126 states and 266867 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:17,960 INFO L93 Difference]: Finished difference Result 203383 states and 440408 transitions. [2021-06-12 20:34:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 20:34:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-06-12 20:34:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:18,235 INFO L225 Difference]: With dead ends: 203383 [2021-06-12 20:34:18,235 INFO L226 Difference]: Without dead ends: 203092 [2021-06-12 20:34:18,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 897.3ms TimeCoverageRelationStatistics Valid=782, Invalid=6190, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 20:34:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203092 states. [2021-06-12 20:34:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203092 to 153026. [2021-06-12 20:34:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153026 states, 153025 states have (on average 2.1853487992158143) internal successors, (334413), 153025 states have internal predecessors, (334413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:21,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153026 states to 153026 states and 334413 transitions. [2021-06-12 20:34:21,192 INFO L78 Accepts]: Start accepts. Automaton has 153026 states and 334413 transitions. Word has length 76 [2021-06-12 20:34:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:21,192 INFO L482 AbstractCegarLoop]: Abstraction has 153026 states and 334413 transitions. [2021-06-12 20:34:21,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:21,192 INFO L276 IsEmpty]: Start isEmpty. Operand 153026 states and 334413 transitions. [2021-06-12 20:34:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-06-12 20:34:21,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:21,266 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:21,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:21,475 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:21,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1785917094, now seen corresponding path program 121 times [2021-06-12 20:34:21,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:21,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504173443] [2021-06-12 20:34:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 144 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:21,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:21,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504173443] [2021-06-12 20:34:21,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504173443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:21,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328195645] [2021-06-12 20:34:21,569 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 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 [2021-06-12 20:34:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:21,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:34:21,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 114 proven. 41 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-06-12 20:34:21,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328195645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:21,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:21,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 15 [2021-06-12 20:34:21,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158111917] [2021-06-12 20:34:21,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:34:21,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:21,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:34:21,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:34:21,683 INFO L87 Difference]: Start difference. First operand 153026 states and 334413 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 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) [2021-06-12 20:34:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:22,553 INFO L93 Difference]: Finished difference Result 163078 states and 354025 transitions. [2021-06-12 20:34:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 20:34:22,553 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 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 76 [2021-06-12 20:34:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:22,748 INFO L225 Difference]: With dead ends: 163078 [2021-06-12 20:34:22,748 INFO L226 Difference]: Without dead ends: 162830 [2021-06-12 20:34:22,749 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:34:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162830 states. [2021-06-12 20:34:24,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162830 to 153130. [2021-06-12 20:34:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153130 states, 153129 states have (on average 2.1844392636273993) internal successors, (334501), 153129 states have internal predecessors, (334501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153130 states to 153130 states and 334501 transitions. [2021-06-12 20:34:25,142 INFO L78 Accepts]: Start accepts. Automaton has 153130 states and 334501 transitions. Word has length 76 [2021-06-12 20:34:25,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:25,142 INFO L482 AbstractCegarLoop]: Abstraction has 153130 states and 334501 transitions. [2021-06-12 20:34:25,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 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) [2021-06-12 20:34:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 153130 states and 334501 transitions. [2021-06-12 20:34:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:34:25,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:25,272 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:25,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-12 20:34:25,473 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash -316262490, now seen corresponding path program 122 times [2021-06-12 20:34:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:25,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881595539] [2021-06-12 20:34:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:25,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:25,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881595539] [2021-06-12 20:34:25,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881595539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:25,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92103105] [2021-06-12 20:34:25,592 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 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 [2021-06-12 20:34:26,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:26,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:34:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:26,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92103105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:26,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:26,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 20:34:26,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335694437] [2021-06-12 20:34:26,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:34:26,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:26,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:34:26,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:34:26,145 INFO L87 Difference]: Start difference. First operand 153130 states and 334501 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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) [2021-06-12 20:34:26,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:26,818 INFO L93 Difference]: Finished difference Result 169486 states and 368744 transitions. [2021-06-12 20:34:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:34:26,818 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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 86 [2021-06-12 20:34:26,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:27,263 INFO L225 Difference]: With dead ends: 169486 [2021-06-12 20:34:27,263 INFO L226 Difference]: Without dead ends: 169486 [2021-06-12 20:34:27,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:34:27,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169486 states. [2021-06-12 20:34:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169486 to 157008. [2021-06-12 20:34:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157008 states, 157007 states have (on average 2.18660951422548) internal successors, (343313), 157007 states have internal predecessors, (343313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157008 states to 157008 states and 343313 transitions. [2021-06-12 20:34:29,780 INFO L78 Accepts]: Start accepts. Automaton has 157008 states and 343313 transitions. Word has length 86 [2021-06-12 20:34:29,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:29,780 INFO L482 AbstractCegarLoop]: Abstraction has 157008 states and 343313 transitions. [2021-06-12 20:34:29,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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) [2021-06-12 20:34:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 157008 states and 343313 transitions. [2021-06-12 20:34:29,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:34:29,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:29,908 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:30,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 20:34:30,109 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:30,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:30,109 INFO L82 PathProgramCache]: Analyzing trace with hash -342094170, now seen corresponding path program 123 times [2021-06-12 20:34:30,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:30,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287804533] [2021-06-12 20:34:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:30,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:30,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287804533] [2021-06-12 20:34:30,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287804533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:30,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210338584] [2021-06-12 20:34:30,171 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 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 [2021-06-12 20:34:30,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 20:34:30,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:30,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:34:30,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:30,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210338584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:30,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:30,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:34:30,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794418081] [2021-06-12 20:34:30,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:30,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:30,310 INFO L87 Difference]: Start difference. First operand 157008 states and 343313 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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) [2021-06-12 20:34:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:31,116 INFO L93 Difference]: Finished difference Result 159720 states and 347802 transitions. [2021-06-12 20:34:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 20:34:31,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 86 [2021-06-12 20:34:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:31,300 INFO L225 Difference]: With dead ends: 159720 [2021-06-12 20:34:31,301 INFO L226 Difference]: Without dead ends: 159716 [2021-06-12 20:34:31,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:34:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159716 states. [2021-06-12 20:34:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159716 to 154858. [2021-06-12 20:34:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154858 states, 154857 states have (on average 2.1844734174109015) internal successors, (338281), 154857 states have internal predecessors, (338281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154858 states to 154858 states and 338281 transitions. [2021-06-12 20:34:34,563 INFO L78 Accepts]: Start accepts. Automaton has 154858 states and 338281 transitions. Word has length 86 [2021-06-12 20:34:34,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:34,563 INFO L482 AbstractCegarLoop]: Abstraction has 154858 states and 338281 transitions. [2021-06-12 20:34:34,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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) [2021-06-12 20:34:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 154858 states and 338281 transitions. [2021-06-12 20:34:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:34:34,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:34,730 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:34,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:34,931 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:34,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1880023924, now seen corresponding path program 124 times [2021-06-12 20:34:34,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:34,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290556032] [2021-06-12 20:34:34,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 154 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:34,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:34,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290556032] [2021-06-12 20:34:34,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290556032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:34,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342940678] [2021-06-12 20:34:34,990 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 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 [2021-06-12 20:34:35,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:34:35,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:35,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:34:35,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 150 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:34:35,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342940678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:35,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:35,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-06-12 20:34:35,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635740753] [2021-06-12 20:34:35,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:34:35,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:34:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:34:35,181 INFO L87 Difference]: Start difference. First operand 154858 states and 338281 transitions. Second operand has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 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) [2021-06-12 20:34:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:36,110 INFO L93 Difference]: Finished difference Result 164918 states and 359351 transitions. [2021-06-12 20:34:36,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:34:36,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 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 86 [2021-06-12 20:34:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:36,316 INFO L225 Difference]: With dead ends: 164918 [2021-06-12 20:34:36,317 INFO L226 Difference]: Without dead ends: 164914 [2021-06-12 20:34:36,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:34:36,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164914 states. [2021-06-12 20:34:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164914 to 155138. [2021-06-12 20:34:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155138 states, 155137 states have (on average 2.1851718158788684) internal successors, (339001), 155137 states have internal predecessors, (339001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155138 states to 155138 states and 339001 transitions. [2021-06-12 20:34:38,759 INFO L78 Accepts]: Start accepts. Automaton has 155138 states and 339001 transitions. Word has length 86 [2021-06-12 20:34:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:38,759 INFO L482 AbstractCegarLoop]: Abstraction has 155138 states and 339001 transitions. [2021-06-12 20:34:38,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 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) [2021-06-12 20:34:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 155138 states and 339001 transitions. [2021-06-12 20:34:38,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:34:38,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:38,885 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:39,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 20:34:39,086 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:39,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:39,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1015661798, now seen corresponding path program 125 times [2021-06-12 20:34:39,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:39,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412443471] [2021-06-12 20:34:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:34:39,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:39,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412443471] [2021-06-12 20:34:39,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412443471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:39,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050558357] [2021-06-12 20:34:39,147 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 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 [2021-06-12 20:34:39,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 20:34:39,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:39,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:34:39,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 146 proven. 87 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-12 20:34:39,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050558357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:39,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:39,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2021-06-12 20:34:39,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779388052] [2021-06-12 20:34:39,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:34:39,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:39,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:34:39,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:34:39,723 INFO L87 Difference]: Start difference. First operand 155138 states and 339001 transitions. Second operand has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:40,513 INFO L93 Difference]: Finished difference Result 162401 states and 354857 transitions. [2021-06-12 20:34:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:34:40,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-12 20:34:40,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:40,944 INFO L225 Difference]: With dead ends: 162401 [2021-06-12 20:34:40,944 INFO L226 Difference]: Without dead ends: 162246 [2021-06-12 20:34:40,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 701.7ms TimeCoverageRelationStatistics Valid=458, Invalid=1102, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:34:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162246 states. [2021-06-12 20:34:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162246 to 154498. [2021-06-12 20:34:42,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154498 states, 154497 states have (on average 2.185110390493019) internal successors, (337593), 154497 states have internal predecessors, (337593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154498 states to 154498 states and 337593 transitions. [2021-06-12 20:34:43,376 INFO L78 Accepts]: Start accepts. Automaton has 154498 states and 337593 transitions. Word has length 86 [2021-06-12 20:34:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:43,376 INFO L482 AbstractCegarLoop]: Abstraction has 154498 states and 337593 transitions. [2021-06-12 20:34:43,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 154498 states and 337593 transitions. [2021-06-12 20:34:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:34:43,490 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:43,490 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:43,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-12 20:34:43,690 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:43,691 INFO L82 PathProgramCache]: Analyzing trace with hash 381795686, now seen corresponding path program 126 times [2021-06-12 20:34:43,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:43,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542503916] [2021-06-12 20:34:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 20:34:43,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:43,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542503916] [2021-06-12 20:34:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542503916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:43,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512832928] [2021-06-12 20:34:43,731 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 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 [2021-06-12 20:34:43,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 20:34:43,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:43,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:34:43,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 20:34:43,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512832928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:43,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:43,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 20:34:43,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197794866] [2021-06-12 20:34:43,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 20:34:43,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:43,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 20:34:43,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 20:34:43,876 INFO L87 Difference]: Start difference. First operand 154498 states and 337593 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:34:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:44,702 INFO L93 Difference]: Finished difference Result 187447 states and 406719 transitions. [2021-06-12 20:34:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 20:34:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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 86 [2021-06-12 20:34:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:44,929 INFO L225 Difference]: With dead ends: 187447 [2021-06-12 20:34:44,929 INFO L226 Difference]: Without dead ends: 187447 [2021-06-12 20:34:44,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:34:45,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187447 states. [2021-06-12 20:34:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187447 to 159330. [2021-06-12 20:34:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159330 states, 159329 states have (on average 2.1893126800519678) internal successors, (348821), 159329 states have internal predecessors, (348821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159330 states to 159330 states and 348821 transitions. [2021-06-12 20:34:47,426 INFO L78 Accepts]: Start accepts. Automaton has 159330 states and 348821 transitions. Word has length 86 [2021-06-12 20:34:47,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:47,426 INFO L482 AbstractCegarLoop]: Abstraction has 159330 states and 348821 transitions. [2021-06-12 20:34:47,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 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) [2021-06-12 20:34:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 159330 states and 348821 transitions. [2021-06-12 20:34:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:34:47,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:47,951 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:48,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 20:34:48,152 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:48,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1887951014, now seen corresponding path program 127 times [2021-06-12 20:34:48,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:48,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966110249] [2021-06-12 20:34:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 110 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 20:34:48,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966110249] [2021-06-12 20:34:48,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966110249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:48,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756052924] [2021-06-12 20:34:48,204 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 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 [2021-06-12 20:34:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:34:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:48,341 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:34:48,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756052924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:48,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:48,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 20:34:48,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229602474] [2021-06-12 20:34:48,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:34:48,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:34:48,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:34:48,342 INFO L87 Difference]: Start difference. First operand 159330 states and 348821 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 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) [2021-06-12 20:34:49,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:49,229 INFO L93 Difference]: Finished difference Result 195387 states and 423182 transitions. [2021-06-12 20:34:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:34:49,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 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 86 [2021-06-12 20:34:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:49,449 INFO L225 Difference]: With dead ends: 195387 [2021-06-12 20:34:49,449 INFO L226 Difference]: Without dead ends: 195323 [2021-06-12 20:34:49,449 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:34:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195323 states. [2021-06-12 20:34:51,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195323 to 159302. [2021-06-12 20:34:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159302 states, 159301 states have (on average 2.1885926642017313) internal successors, (348645), 159301 states have internal predecessors, (348645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:52,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159302 states to 159302 states and 348645 transitions. [2021-06-12 20:34:52,407 INFO L78 Accepts]: Start accepts. Automaton has 159302 states and 348645 transitions. Word has length 86 [2021-06-12 20:34:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:52,407 INFO L482 AbstractCegarLoop]: Abstraction has 159302 states and 348645 transitions. [2021-06-12 20:34:52,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 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) [2021-06-12 20:34:52,408 INFO L276 IsEmpty]: Start isEmpty. Operand 159302 states and 348645 transitions. [2021-06-12 20:34:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:34:52,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:52,536 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:52,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:52,737 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:52,737 INFO L82 PathProgramCache]: Analyzing trace with hash -565732340, now seen corresponding path program 128 times [2021-06-12 20:34:52,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:52,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295966282] [2021-06-12 20:34:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 101 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 20:34:52,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:52,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295966282] [2021-06-12 20:34:52,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295966282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:52,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871139535] [2021-06-12 20:34:52,786 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 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 [2021-06-12 20:34:52,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:34:52,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:52,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:34:52,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 131 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 20:34:52,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871139535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:52,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:52,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-12 20:34:52,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719084633] [2021-06-12 20:34:52,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:34:52,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:52,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:34:52,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:34:52,922 INFO L87 Difference]: Start difference. First operand 159302 states and 348645 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 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) [2021-06-12 20:34:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:34:53,782 INFO L93 Difference]: Finished difference Result 177150 states and 384101 transitions. [2021-06-12 20:34:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:34:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 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 86 [2021-06-12 20:34:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:34:53,980 INFO L225 Difference]: With dead ends: 177150 [2021-06-12 20:34:53,981 INFO L226 Difference]: Without dead ends: 177126 [2021-06-12 20:34:53,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:34:54,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177126 states. [2021-06-12 20:34:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177126 to 159386. [2021-06-12 20:34:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159386 states, 159385 states have (on average 2.1882674028296263) internal successors, (348777), 159385 states have internal predecessors, (348777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159386 states to 159386 states and 348777 transitions. [2021-06-12 20:34:57,328 INFO L78 Accepts]: Start accepts. Automaton has 159386 states and 348777 transitions. Word has length 86 [2021-06-12 20:34:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:34:57,328 INFO L482 AbstractCegarLoop]: Abstraction has 159386 states and 348777 transitions. [2021-06-12 20:34:57,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 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) [2021-06-12 20:34:57,329 INFO L276 IsEmpty]: Start isEmpty. Operand 159386 states and 348777 transitions. [2021-06-12 20:34:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:34:57,471 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:34:57,471 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:34:57,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:34:57,671 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:34:57,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:34:57,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2093645926, now seen corresponding path program 129 times [2021-06-12 20:34:57,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:34:57,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622624811] [2021-06-12 20:34:57,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:34:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:34:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 104 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:34:57,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:34:57,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622624811] [2021-06-12 20:34:57,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622624811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:57,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299963672] [2021-06-12 20:34:57,725 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 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 [2021-06-12 20:34:57,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 20:34:57,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:34:57,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 20:34:57,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:34:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-12 20:34:57,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299963672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:34:57,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:34:57,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-06-12 20:34:57,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749034486] [2021-06-12 20:34:57,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:34:57,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:34:57,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:34:57,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:34:57,972 INFO L87 Difference]: Start difference. First operand 159386 states and 348777 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:34:58,870 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 20:35:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:00,423 INFO L93 Difference]: Finished difference Result 275251 states and 593414 transitions. [2021-06-12 20:35:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-06-12 20:35:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-12 20:35:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:00,757 INFO L225 Difference]: With dead ends: 275251 [2021-06-12 20:35:00,757 INFO L226 Difference]: Without dead ends: 275139 [2021-06-12 20:35:00,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 1215.3ms TimeCoverageRelationStatistics Valid=1037, Invalid=10519, Unknown=0, NotChecked=0, Total=11556 [2021-06-12 20:35:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275139 states. [2021-06-12 20:35:03,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275139 to 204668. [2021-06-12 20:35:04,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204668 states, 204667 states have (on average 2.1685713866915526) internal successors, (443835), 204667 states have internal predecessors, (443835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:05,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204668 states to 204668 states and 443835 transitions. [2021-06-12 20:35:05,046 INFO L78 Accepts]: Start accepts. Automaton has 204668 states and 443835 transitions. Word has length 86 [2021-06-12 20:35:05,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:05,046 INFO L482 AbstractCegarLoop]: Abstraction has 204668 states and 443835 transitions. [2021-06-12 20:35:05,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:05,047 INFO L276 IsEmpty]: Start isEmpty. Operand 204668 states and 443835 transitions. [2021-06-12 20:35:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:35:05,173 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:05,173 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:05,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:05,374 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:05,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1967004549, now seen corresponding path program 130 times [2021-06-12 20:35:05,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:05,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180612614] [2021-06-12 20:35:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 196 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:05,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:05,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180612614] [2021-06-12 20:35:05,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180612614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:05,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523249482] [2021-06-12 20:35:05,442 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 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 [2021-06-12 20:35:05,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:05,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:05,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 20:35:05,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 144 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:35:05,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523249482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:05,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:05,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2021-06-12 20:35:05,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787447809] [2021-06-12 20:35:05,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:35:05,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:05,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:35:05,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:05,645 INFO L87 Difference]: Start difference. First operand 204668 states and 443835 transitions. Second operand has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:06,840 INFO L93 Difference]: Finished difference Result 247113 states and 534129 transitions. [2021-06-12 20:35:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:35:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-06-12 20:35:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:07,164 INFO L225 Difference]: With dead ends: 247113 [2021-06-12 20:35:07,165 INFO L226 Difference]: Without dead ends: 247095 [2021-06-12 20:35:07,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 268.7ms TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:35:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247095 states. [2021-06-12 20:35:10,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247095 to 223232. [2021-06-12 20:35:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223232 states, 223231 states have (on average 2.1722565414301775) internal successors, (484915), 223231 states have internal predecessors, (484915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223232 states to 223232 states and 484915 transitions. [2021-06-12 20:35:11,361 INFO L78 Accepts]: Start accepts. Automaton has 223232 states and 484915 transitions. Word has length 86 [2021-06-12 20:35:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:11,361 INFO L482 AbstractCegarLoop]: Abstraction has 223232 states and 484915 transitions. [2021-06-12 20:35:11,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 223232 states and 484915 transitions. [2021-06-12 20:35:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:35:11,487 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:11,487 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:11,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-12 20:35:11,688 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash 454346087, now seen corresponding path program 131 times [2021-06-12 20:35:11,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:11,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613123671] [2021-06-12 20:35:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 106 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:35:11,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:11,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613123671] [2021-06-12 20:35:11,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613123671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:11,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33623298] [2021-06-12 20:35:11,765 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 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 [2021-06-12 20:35:11,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:35:11,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:35:11,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-12 20:35:11,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33623298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:11,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:11,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-12 20:35:11,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786314643] [2021-06-12 20:35:11,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:35:11,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:35:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:35:11,932 INFO L87 Difference]: Start difference. First operand 223232 states and 484915 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 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) [2021-06-12 20:35:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:12,948 INFO L93 Difference]: Finished difference Result 226999 states and 490880 transitions. [2021-06-12 20:35:12,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:35:12,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 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 86 [2021-06-12 20:35:12,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:13,236 INFO L225 Difference]: With dead ends: 226999 [2021-06-12 20:35:13,236 INFO L226 Difference]: Without dead ends: 226645 [2021-06-12 20:35:13,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:35:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226645 states. [2021-06-12 20:35:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226645 to 217428. [2021-06-12 20:35:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217428 states, 217427 states have (on average 2.1668835977132557) internal successors, (471139), 217427 states have internal predecessors, (471139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:16,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217428 states to 217428 states and 471139 transitions. [2021-06-12 20:35:16,992 INFO L78 Accepts]: Start accepts. Automaton has 217428 states and 471139 transitions. Word has length 86 [2021-06-12 20:35:16,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:16,992 INFO L482 AbstractCegarLoop]: Abstraction has 217428 states and 471139 transitions. [2021-06-12 20:35:16,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 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) [2021-06-12 20:35:16,992 INFO L276 IsEmpty]: Start isEmpty. Operand 217428 states and 471139 transitions. [2021-06-12 20:35:17,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:35:17,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:17,536 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:17,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:17,741 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash -400900165, now seen corresponding path program 132 times [2021-06-12 20:35:17,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:17,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064636178] [2021-06-12 20:35:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:17,803 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:35:17,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:17,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064636178] [2021-06-12 20:35:17,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064636178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:17,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731187383] [2021-06-12 20:35:17,804 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 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 [2021-06-12 20:35:17,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 20:35:17,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:17,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:35:17,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:35:17,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731187383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:17,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:17,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:35:17,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528288739] [2021-06-12 20:35:17,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:17,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:17,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:17,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:17,945 INFO L87 Difference]: Start difference. First operand 217428 states and 471139 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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) [2021-06-12 20:35:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:19,051 INFO L93 Difference]: Finished difference Result 237756 states and 514448 transitions. [2021-06-12 20:35:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:35:19,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 86 [2021-06-12 20:35:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:19,527 INFO L225 Difference]: With dead ends: 237756 [2021-06-12 20:35:19,527 INFO L226 Difference]: Without dead ends: 237672 [2021-06-12 20:35:19,528 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237672 states. [2021-06-12 20:35:22,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237672 to 232076. [2021-06-12 20:35:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232076 states, 232075 states have (on average 2.170931810837014) internal successors, (503819), 232075 states have internal predecessors, (503819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:23,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232076 states to 232076 states and 503819 transitions. [2021-06-12 20:35:23,670 INFO L78 Accepts]: Start accepts. Automaton has 232076 states and 503819 transitions. Word has length 86 [2021-06-12 20:35:23,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:23,670 INFO L482 AbstractCegarLoop]: Abstraction has 232076 states and 503819 transitions. [2021-06-12 20:35:23,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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) [2021-06-12 20:35:23,670 INFO L276 IsEmpty]: Start isEmpty. Operand 232076 states and 503819 transitions. [2021-06-12 20:35:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-06-12 20:35:23,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:23,809 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:24,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 20:35:24,010 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:24,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1535732903, now seen corresponding path program 133 times [2021-06-12 20:35:24,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:24,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040467739] [2021-06-12 20:35:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:24,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:24,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040467739] [2021-06-12 20:35:24,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040467739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:24,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118968177] [2021-06-12 20:35:24,121 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 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 [2021-06-12 20:35:24,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:24,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 20:35:24,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:24,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118968177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:24,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:24,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 20:35:24,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007850935] [2021-06-12 20:35:24,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:35:24,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:24,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:35:24,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:35:24,265 INFO L87 Difference]: Start difference. First operand 232076 states and 503819 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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) [2021-06-12 20:35:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:25,752 INFO L93 Difference]: Finished difference Result 252517 states and 547531 transitions. [2021-06-12 20:35:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:35:25,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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 86 [2021-06-12 20:35:25,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:26,065 INFO L225 Difference]: With dead ends: 252517 [2021-06-12 20:35:26,066 INFO L226 Difference]: Without dead ends: 252517 [2021-06-12 20:35:26,066 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:35:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252517 states. [2021-06-12 20:35:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252517 to 241564. [2021-06-12 20:35:29,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241564 states, 241563 states have (on average 2.17548631205938) internal successors, (525517), 241563 states have internal predecessors, (525517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241564 states to 241564 states and 525517 transitions. [2021-06-12 20:35:29,991 INFO L78 Accepts]: Start accepts. Automaton has 241564 states and 525517 transitions. Word has length 86 [2021-06-12 20:35:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:29,992 INFO L482 AbstractCegarLoop]: Abstraction has 241564 states and 525517 transitions. [2021-06-12 20:35:29,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 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) [2021-06-12 20:35:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 241564 states and 525517 transitions. [2021-06-12 20:35:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:35:30,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:30,583 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:30,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:30,796 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:30,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:30,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1737688229, now seen corresponding path program 134 times [2021-06-12 20:35:30,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:30,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168653116] [2021-06-12 20:35:30,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:30,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:30,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168653116] [2021-06-12 20:35:30,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168653116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:30,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615505994] [2021-06-12 20:35:30,927 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 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 [2021-06-12 20:35:30,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:35:30,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:30,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:31,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615505994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:31,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:31,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-12 20:35:31,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336287104] [2021-06-12 20:35:31,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 20:35:31,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:31,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 20:35:31,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:35:31,077 INFO L87 Difference]: Start difference. First operand 241564 states and 525517 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 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) [2021-06-12 20:35:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:32,272 INFO L93 Difference]: Finished difference Result 283927 states and 618212 transitions. [2021-06-12 20:35:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:35:32,272 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 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 96 [2021-06-12 20:35:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:32,923 INFO L225 Difference]: With dead ends: 283927 [2021-06-12 20:35:32,924 INFO L226 Difference]: Without dead ends: 283661 [2021-06-12 20:35:32,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:35:33,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283661 states. [2021-06-12 20:35:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283661 to 277706. [2021-06-12 20:35:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277706 states, 277705 states have (on average 2.1876415620892673) internal successors, (607519), 277705 states have internal predecessors, (607519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277706 states to 277706 states and 607519 transitions. [2021-06-12 20:35:37,985 INFO L78 Accepts]: Start accepts. Automaton has 277706 states and 607519 transitions. Word has length 96 [2021-06-12 20:35:37,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:37,985 INFO L482 AbstractCegarLoop]: Abstraction has 277706 states and 607519 transitions. [2021-06-12 20:35:37,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 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) [2021-06-12 20:35:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 277706 states and 607519 transitions. [2021-06-12 20:35:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:35:38,198 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:38,198 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:38,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 20:35:38,398 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:38,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:38,399 INFO L82 PathProgramCache]: Analyzing trace with hash -232879921, now seen corresponding path program 135 times [2021-06-12 20:35:38,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:38,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762221754] [2021-06-12 20:35:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:38,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:38,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762221754] [2021-06-12 20:35:38,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762221754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:38,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664493986] [2021-06-12 20:35:38,471 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 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 [2021-06-12 20:35:38,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 20:35:38,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:35:39,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664493986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:39,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:39,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:35:39,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801037177] [2021-06-12 20:35:39,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:39,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:39,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:39,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:39,185 INFO L87 Difference]: Start difference. First operand 277706 states and 607519 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:35:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:40,347 INFO L93 Difference]: Finished difference Result 283289 states and 617046 transitions. [2021-06-12 20:35:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:35:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:35:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:41,096 INFO L225 Difference]: With dead ends: 283289 [2021-06-12 20:35:41,096 INFO L226 Difference]: Without dead ends: 283289 [2021-06-12 20:35:41,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:35:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283289 states. [2021-06-12 20:35:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283289 to 273694. [2021-06-12 20:35:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273694 states, 273693 states have (on average 2.184911561494083) internal successors, (597995), 273693 states have internal predecessors, (597995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273694 states to 273694 states and 597995 transitions. [2021-06-12 20:35:46,569 INFO L78 Accepts]: Start accepts. Automaton has 273694 states and 597995 transitions. Word has length 96 [2021-06-12 20:35:46,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:46,569 INFO L482 AbstractCegarLoop]: Abstraction has 273694 states and 597995 transitions. [2021-06-12 20:35:46,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:35:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 273694 states and 597995 transitions. [2021-06-12 20:35:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:35:46,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:46,767 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:46,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 20:35:46,967 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:46,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:46,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1493261733, now seen corresponding path program 136 times [2021-06-12 20:35:46,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:46,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397015295] [2021-06-12 20:35:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:35:47,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:47,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397015295] [2021-06-12 20:35:47,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397015295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:47,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646096462] [2021-06-12 20:35:47,040 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 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 [2021-06-12 20:35:47,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:35:47,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:47,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:47,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:35:47,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646096462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:47,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:47,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:35:47,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263625908] [2021-06-12 20:35:47,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:47,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:47,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:47,193 INFO L87 Difference]: Start difference. First operand 273694 states and 597995 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:35:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:48,248 INFO L93 Difference]: Finished difference Result 283158 states and 616236 transitions. [2021-06-12 20:35:48,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:35:48,249 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:35:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:48,922 INFO L225 Difference]: With dead ends: 283158 [2021-06-12 20:35:48,922 INFO L226 Difference]: Without dead ends: 283152 [2021-06-12 20:35:48,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:35:49,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283152 states. [2021-06-12 20:35:52,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283152 to 277546. [2021-06-12 20:35:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277546 states, 277545 states have (on average 2.1873894323443044) internal successors, (607099), 277545 states have internal predecessors, (607099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:35:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277546 states to 277546 states and 607099 transitions. [2021-06-12 20:35:53,994 INFO L78 Accepts]: Start accepts. Automaton has 277546 states and 607099 transitions. Word has length 96 [2021-06-12 20:35:53,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:35:53,994 INFO L482 AbstractCegarLoop]: Abstraction has 277546 states and 607099 transitions. [2021-06-12 20:35:53,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:35:53,994 INFO L276 IsEmpty]: Start isEmpty. Operand 277546 states and 607099 transitions. [2021-06-12 20:35:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:35:54,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:35:54,169 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:35:54,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:35:54,370 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:35:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:35:54,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1188536113, now seen corresponding path program 137 times [2021-06-12 20:35:54,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:35:54,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529399027] [2021-06-12 20:35:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:35:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:35:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:35:54,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:35:54,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529399027] [2021-06-12 20:35:54,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529399027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:54,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344683154] [2021-06-12 20:35:54,437 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 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 [2021-06-12 20:35:54,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 20:35:54,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:35:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:35:54,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:35:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:35:54,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344683154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:35:54,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:35:54,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:35:54,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360662554] [2021-06-12 20:35:54,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:35:54,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:35:54,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:35:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:35:54,593 INFO L87 Difference]: Start difference. First operand 277546 states and 607099 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:35:55,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:35:55,711 INFO L93 Difference]: Finished difference Result 287744 states and 625793 transitions. [2021-06-12 20:35:55,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:35:55,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:35:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:35:56,379 INFO L225 Difference]: With dead ends: 287744 [2021-06-12 20:35:56,379 INFO L226 Difference]: Without dead ends: 287744 [2021-06-12 20:35:56,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:35:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287744 states. [2021-06-12 20:36:00,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287744 to 277562. [2021-06-12 20:36:00,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277562 states, 277561 states have (on average 2.1872056953246313) internal successors, (607083), 277561 states have internal predecessors, (607083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277562 states to 277562 states and 607083 transitions. [2021-06-12 20:36:01,910 INFO L78 Accepts]: Start accepts. Automaton has 277562 states and 607083 transitions. Word has length 96 [2021-06-12 20:36:01,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:01,910 INFO L482 AbstractCegarLoop]: Abstraction has 277562 states and 607083 transitions. [2021-06-12 20:36:01,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:36:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 277562 states and 607083 transitions. [2021-06-12 20:36:02,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:36:02,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:02,185 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:02,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 20:36:02,405 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash -798332187, now seen corresponding path program 138 times [2021-06-12 20:36:02,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:02,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749203938] [2021-06-12 20:36:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:02,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:02,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749203938] [2021-06-12 20:36:02,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749203938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:02,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176984836] [2021-06-12 20:36:02,481 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 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 [2021-06-12 20:36:02,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 20:36:02,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:02,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:02,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:02,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176984836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:02,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:02,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 20:36:02,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529020243] [2021-06-12 20:36:02,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:02,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:02,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:02,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:02,670 INFO L87 Difference]: Start difference. First operand 277562 states and 607083 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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) [2021-06-12 20:36:04,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:04,712 INFO L93 Difference]: Finished difference Result 287474 states and 626678 transitions. [2021-06-12 20:36:04,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:36:04,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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 96 [2021-06-12 20:36:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:05,299 INFO L225 Difference]: With dead ends: 287474 [2021-06-12 20:36:05,299 INFO L226 Difference]: Without dead ends: 287474 [2021-06-12 20:36:05,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:36:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287474 states. [2021-06-12 20:36:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287474 to 273034. [2021-06-12 20:36:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273034 states, 273033 states have (on average 2.184860438115539) internal successors, (596539), 273033 states have internal predecessors, (596539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273034 states to 273034 states and 596539 transitions. [2021-06-12 20:36:10,525 INFO L78 Accepts]: Start accepts. Automaton has 273034 states and 596539 transitions. Word has length 96 [2021-06-12 20:36:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:10,525 INFO L482 AbstractCegarLoop]: Abstraction has 273034 states and 596539 transitions. [2021-06-12 20:36:10,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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) [2021-06-12 20:36:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 273034 states and 596539 transitions. [2021-06-12 20:36:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:36:10,729 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:10,729 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:10,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:10,930 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:10,930 INFO L82 PathProgramCache]: Analyzing trace with hash 529753287, now seen corresponding path program 139 times [2021-06-12 20:36:10,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:10,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996112024] [2021-06-12 20:36:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:36:10,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:10,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996112024] [2021-06-12 20:36:10,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996112024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:10,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584457329] [2021-06-12 20:36:10,984 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 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 [2021-06-12 20:36:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:11,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:11,664 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 20:36:11,674 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:36:11,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584457329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:11,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:11,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:36:11,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533225978] [2021-06-12 20:36:11,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:11,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:11,674 INFO L87 Difference]: Start difference. First operand 273034 states and 596539 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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) [2021-06-12 20:36:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:12,852 INFO L93 Difference]: Finished difference Result 292897 states and 638403 transitions. [2021-06-12 20:36:12,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:36:12,852 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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 96 [2021-06-12 20:36:12,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:13,172 INFO L225 Difference]: With dead ends: 292897 [2021-06-12 20:36:13,172 INFO L226 Difference]: Without dead ends: 292861 [2021-06-12 20:36:13,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:36:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292861 states. [2021-06-12 20:36:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292861 to 277790. [2021-06-12 20:36:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277790 states, 277789 states have (on average 2.1869656465878777) internal successors, (607515), 277789 states have internal predecessors, (607515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277790 states to 277790 states and 607515 transitions. [2021-06-12 20:36:18,900 INFO L78 Accepts]: Start accepts. Automaton has 277790 states and 607515 transitions. Word has length 96 [2021-06-12 20:36:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:18,900 INFO L482 AbstractCegarLoop]: Abstraction has 277790 states and 607515 transitions. [2021-06-12 20:36:18,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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) [2021-06-12 20:36:18,900 INFO L276 IsEmpty]: Start isEmpty. Operand 277790 states and 607515 transitions. [2021-06-12 20:36:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:36:19,182 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:19,182 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:19,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:19,397 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:19,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2053890469, now seen corresponding path program 140 times [2021-06-12 20:36:19,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:19,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991180678] [2021-06-12 20:36:19,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:19,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:36:19,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:19,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991180678] [2021-06-12 20:36:19,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991180678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:19,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437089005] [2021-06-12 20:36:19,475 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 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 [2021-06-12 20:36:19,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:36:19,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:19,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:19,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:36:20,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437089005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:20,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:20,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:36:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396309261] [2021-06-12 20:36:20,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:20,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:20,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:20,103 INFO L87 Difference]: Start difference. First operand 277790 states and 607515 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:36:21,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:21,613 INFO L93 Difference]: Finished difference Result 289842 states and 631433 transitions. [2021-06-12 20:36:21,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:36:21,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:36:21,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:22,281 INFO L225 Difference]: With dead ends: 289842 [2021-06-12 20:36:22,281 INFO L226 Difference]: Without dead ends: 289806 [2021-06-12 20:36:22,281 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:36:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289806 states. [2021-06-12 20:36:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289806 to 279306. [2021-06-12 20:36:26,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279306 states, 279305 states have (on average 2.1874259322246288) internal successors, (610959), 279305 states have internal predecessors, (610959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279306 states to 279306 states and 610959 transitions. [2021-06-12 20:36:27,413 INFO L78 Accepts]: Start accepts. Automaton has 279306 states and 610959 transitions. Word has length 96 [2021-06-12 20:36:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:27,414 INFO L482 AbstractCegarLoop]: Abstraction has 279306 states and 610959 transitions. [2021-06-12 20:36:27,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:36:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 279306 states and 610959 transitions. [2021-06-12 20:36:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:36:28,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:28,036 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:28,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:28,237 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1749164849, now seen corresponding path program 141 times [2021-06-12 20:36:28,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:28,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290588983] [2021-06-12 20:36:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:28,288 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:36:28,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:28,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290588983] [2021-06-12 20:36:28,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290588983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:28,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021391490] [2021-06-12 20:36:28,289 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 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 [2021-06-12 20:36:28,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 20:36:28,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:28,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:28,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:36:28,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021391490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:28,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:28,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:36:28,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799486969] [2021-06-12 20:36:28,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:28,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:28,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:28,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:28,444 INFO L87 Difference]: Start difference. First operand 279306 states and 610959 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:36:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:29,514 INFO L93 Difference]: Finished difference Result 293716 states and 638382 transitions. [2021-06-12 20:36:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:36:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:36:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:29,852 INFO L225 Difference]: With dead ends: 293716 [2021-06-12 20:36:29,852 INFO L226 Difference]: Without dead ends: 293716 [2021-06-12 20:36:29,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:36:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293716 states. [2021-06-12 20:36:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293716 to 279290. [2021-06-12 20:36:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279290 states, 279289 states have (on average 2.1870356512429776) internal successors, (610815), 279289 states have internal predecessors, (610815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279290 states to 279290 states and 610815 transitions. [2021-06-12 20:36:35,563 INFO L78 Accepts]: Start accepts. Automaton has 279290 states and 610815 transitions. Word has length 96 [2021-06-12 20:36:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:35,564 INFO L482 AbstractCegarLoop]: Abstraction has 279290 states and 610815 transitions. [2021-06-12 20:36:35,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:36:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 279290 states and 610815 transitions. [2021-06-12 20:36:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:36:35,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:35,843 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:36,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:36:36,066 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:36,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1358960923, now seen corresponding path program 142 times [2021-06-12 20:36:36,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:36,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56508957] [2021-06-12 20:36:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:36:36,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:36,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56508957] [2021-06-12 20:36:36,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56508957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:36,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151735332] [2021-06-12 20:36:36,536 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 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 [2021-06-12 20:36:36,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:36:36,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:36,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:36,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:36:36,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151735332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:36,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:36,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 20:36:36,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447488889] [2021-06-12 20:36:36,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:36:36,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:36:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:36:36,729 INFO L87 Difference]: Start difference. First operand 279290 states and 610815 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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) [2021-06-12 20:36:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:38,123 INFO L93 Difference]: Finished difference Result 305876 states and 664178 transitions. [2021-06-12 20:36:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:36:38,124 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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 96 [2021-06-12 20:36:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:38,672 INFO L225 Difference]: With dead ends: 305876 [2021-06-12 20:36:38,672 INFO L226 Difference]: Without dead ends: 305876 [2021-06-12 20:36:38,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 537.5ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:36:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305876 states. [2021-06-12 20:36:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305876 to 279450. [2021-06-12 20:36:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279450 states, 279449 states have (on average 2.186928562993605) internal successors, (611135), 279449 states have internal predecessors, (611135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279450 states to 279450 states and 611135 transitions. [2021-06-12 20:36:44,365 INFO L78 Accepts]: Start accepts. Automaton has 279450 states and 611135 transitions. Word has length 96 [2021-06-12 20:36:44,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:44,366 INFO L482 AbstractCegarLoop]: Abstraction has 279450 states and 611135 transitions. [2021-06-12 20:36:44,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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) [2021-06-12 20:36:44,366 INFO L276 IsEmpty]: Start isEmpty. Operand 279450 states and 611135 transitions. [2021-06-12 20:36:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:36:44,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:44,545 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:44,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-12 20:36:44,745 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:44,745 INFO L82 PathProgramCache]: Analyzing trace with hash 93904007, now seen corresponding path program 143 times [2021-06-12 20:36:44,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:44,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307593984] [2021-06-12 20:36:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:44,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:44,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307593984] [2021-06-12 20:36:44,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307593984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:44,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044182358] [2021-06-12 20:36:44,811 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 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 [2021-06-12 20:36:44,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 20:36:44,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:44,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:44,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:36:44,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044182358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:44,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:44,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 20:36:44,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665946837] [2021-06-12 20:36:44,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:36:44,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:44,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:36:44,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:36:44,965 INFO L87 Difference]: Start difference. First operand 279450 states and 611135 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 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) [2021-06-12 20:36:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:46,479 INFO L93 Difference]: Finished difference Result 291374 states and 635903 transitions. [2021-06-12 20:36:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:36:46,480 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 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 96 [2021-06-12 20:36:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:46,799 INFO L225 Difference]: With dead ends: 291374 [2021-06-12 20:36:46,799 INFO L226 Difference]: Without dead ends: 291374 [2021-06-12 20:36:46,799 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:36:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291374 states. [2021-06-12 20:36:50,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291374 to 275266. [2021-06-12 20:36:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275266 states, 275265 states have (on average 2.185221513813961) internal successors, (601515), 275265 states have internal predecessors, (601515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:36:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275266 states to 275266 states and 601515 transitions. [2021-06-12 20:36:52,541 INFO L78 Accepts]: Start accepts. Automaton has 275266 states and 601515 transitions. Word has length 96 [2021-06-12 20:36:52,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:36:52,557 INFO L482 AbstractCegarLoop]: Abstraction has 275266 states and 601515 transitions. [2021-06-12 20:36:52,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 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) [2021-06-12 20:36:52,557 INFO L276 IsEmpty]: Start isEmpty. Operand 275266 states and 601515 transitions. [2021-06-12 20:36:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:36:52,854 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:36:52,854 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:36:53,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 20:36:53,069 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:36:53,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:36:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash 211982491, now seen corresponding path program 144 times [2021-06-12 20:36:53,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:36:53,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551833628] [2021-06-12 20:36:53,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:36:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:36:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 20:36:53,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:36:53,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551833628] [2021-06-12 20:36:53,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551833628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:53,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280078669] [2021-06-12 20:36:53,145 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 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 [2021-06-12 20:36:53,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 20:36:53,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:36:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:36:53,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:36:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 20:36:53,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280078669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:36:53,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:36:53,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:36:53,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230793824] [2021-06-12 20:36:53,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:36:53,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:36:53,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:36:53,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:36:53,653 INFO L87 Difference]: Start difference. First operand 275266 states and 601515 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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) [2021-06-12 20:36:55,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:36:55,105 INFO L93 Difference]: Finished difference Result 284381 states and 619091 transitions. [2021-06-12 20:36:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:36:55,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 96 [2021-06-12 20:36:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:36:55,606 INFO L225 Difference]: With dead ends: 284381 [2021-06-12 20:36:55,606 INFO L226 Difference]: Without dead ends: 284315 [2021-06-12 20:36:55,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:36:55,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284315 states. [2021-06-12 20:36:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284315 to 279242. [2021-06-12 20:36:59,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279242 states, 279241 states have (on average 2.1870821261920708) internal successors, (610723), 279241 states have internal predecessors, (610723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:00,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279242 states to 279242 states and 610723 transitions. [2021-06-12 20:37:00,725 INFO L78 Accepts]: Start accepts. Automaton has 279242 states and 610723 transitions. Word has length 96 [2021-06-12 20:37:00,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:00,725 INFO L482 AbstractCegarLoop]: Abstraction has 279242 states and 610723 transitions. [2021-06-12 20:37:00,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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) [2021-06-12 20:37:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 279242 states and 610723 transitions. [2021-06-12 20:37:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:37:00,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:00,924 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:01,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 20:37:01,125 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:01,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:01,125 INFO L82 PathProgramCache]: Analyzing trace with hash 194774565, now seen corresponding path program 145 times [2021-06-12 20:37:01,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:01,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979118236] [2021-06-12 20:37:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:37:01,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:01,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979118236] [2021-06-12 20:37:01,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979118236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453368693] [2021-06-12 20:37:01,176 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 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 [2021-06-12 20:37:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:01,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:01,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:37:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453368693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:01,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:01,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:37:01,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062947048] [2021-06-12 20:37:01,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:01,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:01,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:01,714 INFO L87 Difference]: Start difference. First operand 279242 states and 610723 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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) [2021-06-12 20:37:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:02,846 INFO L93 Difference]: Finished difference Result 298839 states and 651898 transitions. [2021-06-12 20:37:02,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:37:02,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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 96 [2021-06-12 20:37:02,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:03,190 INFO L225 Difference]: With dead ends: 298839 [2021-06-12 20:37:03,190 INFO L226 Difference]: Without dead ends: 298803 [2021-06-12 20:37:03,190 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298803 states. [2021-06-12 20:37:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298803 to 280042. [2021-06-12 20:37:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280042 states, 280041 states have (on average 2.1865476840891156) internal successors, (612323), 280041 states have internal predecessors, (612323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:08,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280042 states to 280042 states and 612323 transitions. [2021-06-12 20:37:08,931 INFO L78 Accepts]: Start accepts. Automaton has 280042 states and 612323 transitions. Word has length 96 [2021-06-12 20:37:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:08,931 INFO L482 AbstractCegarLoop]: Abstraction has 280042 states and 612323 transitions. [2021-06-12 20:37:08,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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) [2021-06-12 20:37:08,931 INFO L276 IsEmpty]: Start isEmpty. Operand 280042 states and 612323 transitions. [2021-06-12 20:37:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:37:09,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:09,207 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:09,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 20:37:09,421 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash -794721701, now seen corresponding path program 146 times [2021-06-12 20:37:09,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:09,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748768967] [2021-06-12 20:37:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:09,909 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-12 20:37:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:09,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:09,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748768967] [2021-06-12 20:37:09,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748768967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:09,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415486782] [2021-06-12 20:37:09,919 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 [2021-06-12 20:37:09,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:09,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:09,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:10,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415486782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:10,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:10,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:37:10,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933950780] [2021-06-12 20:37:10,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:10,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:10,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:10,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:10,106 INFO L87 Difference]: Start difference. First operand 280042 states and 612323 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:37:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:11,557 INFO L93 Difference]: Finished difference Result 294586 states and 641708 transitions. [2021-06-12 20:37:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:37:11,557 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:37:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:12,227 INFO L225 Difference]: With dead ends: 294586 [2021-06-12 20:37:12,227 INFO L226 Difference]: Without dead ends: 294544 [2021-06-12 20:37:12,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 542.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294544 states. [2021-06-12 20:37:16,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294544 to 284094. [2021-06-12 20:37:16,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284094 states, 284093 states have (on average 2.187280221617569) internal successors, (621391), 284093 states have internal predecessors, (621391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:17,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284094 states to 284094 states and 621391 transitions. [2021-06-12 20:37:17,835 INFO L78 Accepts]: Start accepts. Automaton has 284094 states and 621391 transitions. Word has length 96 [2021-06-12 20:37:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:17,835 INFO L482 AbstractCegarLoop]: Abstraction has 284094 states and 621391 transitions. [2021-06-12 20:37:17,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:37:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 284094 states and 621391 transitions. [2021-06-12 20:37:18,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:37:18,031 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:18,031 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:18,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 20:37:18,231 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:18,232 INFO L82 PathProgramCache]: Analyzing trace with hash -489996081, now seen corresponding path program 147 times [2021-06-12 20:37:18,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:18,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65733582] [2021-06-12 20:37:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:18,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:18,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65733582] [2021-06-12 20:37:18,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65733582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:18,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653443722] [2021-06-12 20:37:18,303 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 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 [2021-06-12 20:37:18,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 20:37:18,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:18,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:18,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:18,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653443722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:18,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:18,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:37:18,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570319533] [2021-06-12 20:37:18,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:37:18,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:18,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:37:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:37:18,463 INFO L87 Difference]: Start difference. First operand 284094 states and 621391 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:37:19,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:19,548 INFO L93 Difference]: Finished difference Result 301944 states and 656167 transitions. [2021-06-12 20:37:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:37:19,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:37:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:20,231 INFO L225 Difference]: With dead ends: 301944 [2021-06-12 20:37:20,231 INFO L226 Difference]: Without dead ends: 301944 [2021-06-12 20:37:20,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:37:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301944 states. [2021-06-12 20:37:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301944 to 284134. [2021-06-12 20:37:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284134 states, 284133 states have (on average 2.186831519042139) internal successors, (621351), 284133 states have internal predecessors, (621351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:25,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284134 states to 284134 states and 621351 transitions. [2021-06-12 20:37:25,594 INFO L78 Accepts]: Start accepts. Automaton has 284134 states and 621351 transitions. Word has length 96 [2021-06-12 20:37:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:25,594 INFO L482 AbstractCegarLoop]: Abstraction has 284134 states and 621351 transitions. [2021-06-12 20:37:25,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:37:25,595 INFO L276 IsEmpty]: Start isEmpty. Operand 284134 states and 621351 transitions. [2021-06-12 20:37:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:37:25,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:25,852 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:26,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 20:37:26,077 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:26,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:26,077 INFO L82 PathProgramCache]: Analyzing trace with hash -99792155, now seen corresponding path program 148 times [2021-06-12 20:37:26,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:26,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117358748] [2021-06-12 20:37:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:26,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:26,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117358748] [2021-06-12 20:37:26,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117358748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:26,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494291596] [2021-06-12 20:37:26,558 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 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 [2021-06-12 20:37:26,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:37:26,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:26,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:26,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:26,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494291596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:26,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:26,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 20:37:26,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092060803] [2021-06-12 20:37:26,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:37:26,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:26,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:37:26,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:37:26,764 INFO L87 Difference]: Start difference. First operand 284134 states and 621351 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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) [2021-06-12 20:37:28,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:28,207 INFO L93 Difference]: Finished difference Result 329236 states and 714209 transitions. [2021-06-12 20:37:28,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:37:28,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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 96 [2021-06-12 20:37:28,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:28,809 INFO L225 Difference]: With dead ends: 329236 [2021-06-12 20:37:28,809 INFO L226 Difference]: Without dead ends: 329236 [2021-06-12 20:37:28,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 550.7ms TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:37:29,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329236 states. [2021-06-12 20:37:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329236 to 284210. [2021-06-12 20:37:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284210 states, 284209 states have (on average 2.1864367419750956) internal successors, (621405), 284209 states have internal predecessors, (621405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284210 states to 284210 states and 621405 transitions. [2021-06-12 20:37:34,464 INFO L78 Accepts]: Start accepts. Automaton has 284210 states and 621405 transitions. Word has length 96 [2021-06-12 20:37:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:34,464 INFO L482 AbstractCegarLoop]: Abstraction has 284210 states and 621405 transitions. [2021-06-12 20:37:34,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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) [2021-06-12 20:37:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 284210 states and 621405 transitions. [2021-06-12 20:37:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:37:34,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:34,646 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:34,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:34,846 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:34,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1353072775, now seen corresponding path program 149 times [2021-06-12 20:37:34,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:34,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744360427] [2021-06-12 20:37:34,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:34,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744360427] [2021-06-12 20:37:34,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744360427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805231342] [2021-06-12 20:37:34,912 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 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 [2021-06-12 20:37:34,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 20:37:34,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:34,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:34,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:37:35,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805231342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:35,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:35,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 20:37:35,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829553596] [2021-06-12 20:37:35,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:37:35,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:35,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:37:35,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:37:35,066 INFO L87 Difference]: Start difference. First operand 284210 states and 621405 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 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) [2021-06-12 20:37:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:36,637 INFO L93 Difference]: Finished difference Result 319340 states and 693417 transitions. [2021-06-12 20:37:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:37:36,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 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 96 [2021-06-12 20:37:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:37,025 INFO L225 Difference]: With dead ends: 319340 [2021-06-12 20:37:37,026 INFO L226 Difference]: Without dead ends: 319340 [2021-06-12 20:37:37,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:37:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319340 states. [2021-06-12 20:37:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319340 to 284530. [2021-06-12 20:37:41,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284530 states, 284529 states have (on average 2.186227062970734) internal successors, (622045), 284529 states have internal predecessors, (622045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:42,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284530 states to 284530 states and 622045 transitions. [2021-06-12 20:37:42,621 INFO L78 Accepts]: Start accepts. Automaton has 284530 states and 622045 transitions. Word has length 96 [2021-06-12 20:37:42,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:42,621 INFO L482 AbstractCegarLoop]: Abstraction has 284530 states and 622045 transitions. [2021-06-12 20:37:42,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 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) [2021-06-12 20:37:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 284530 states and 622045 transitions. [2021-06-12 20:37:42,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:37:42,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:42,901 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:43,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:43,117 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:43,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:43,117 INFO L82 PathProgramCache]: Analyzing trace with hash -508398491, now seen corresponding path program 150 times [2021-06-12 20:37:43,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:43,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994649101] [2021-06-12 20:37:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:43,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:43,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994649101] [2021-06-12 20:37:43,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994649101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:43,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994378982] [2021-06-12 20:37:43,206 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 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 [2021-06-12 20:37:43,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 20:37:43,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:43,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:43,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:43,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994378982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:43,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:43,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 20:37:43,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661681738] [2021-06-12 20:37:43,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:43,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:43,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:43,740 INFO L87 Difference]: Start difference. First operand 284530 states and 622045 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 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) [2021-06-12 20:37:45,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:45,270 INFO L93 Difference]: Finished difference Result 297354 states and 649674 transitions. [2021-06-12 20:37:45,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:37:45,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 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 96 [2021-06-12 20:37:45,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:45,776 INFO L225 Difference]: With dead ends: 297354 [2021-06-12 20:37:45,777 INFO L226 Difference]: Without dead ends: 297354 [2021-06-12 20:37:45,777 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:37:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297354 states. [2021-06-12 20:37:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297354 to 282646. [2021-06-12 20:37:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.186350368837234) internal successors, (617961), 282645 states have internal predecessors, (617961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:50,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617961 transitions. [2021-06-12 20:37:50,952 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617961 transitions. Word has length 96 [2021-06-12 20:37:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:50,952 INFO L482 AbstractCegarLoop]: Abstraction has 282646 states and 617961 transitions. [2021-06-12 20:37:50,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 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) [2021-06-12 20:37:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617961 transitions. [2021-06-12 20:37:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:37:51,629 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:51,629 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:51,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:51,829 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash 343907052, now seen corresponding path program 151 times [2021-06-12 20:37:51,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:51,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915883427] [2021-06-12 20:37:51,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 141 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:37:51,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:51,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915883427] [2021-06-12 20:37:51,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915883427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:51,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953333671] [2021-06-12 20:37:51,911 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 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 [2021-06-12 20:37:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 20:37:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:37:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 201 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-06-12 20:37:52,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953333671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:52,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:37:52,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 14 [2021-06-12 20:37:52,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866500174] [2021-06-12 20:37:52,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:37:52,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:37:52,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:37:52,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:37:52,048 INFO L87 Difference]: Start difference. First operand 282646 states and 617961 transitions. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 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) [2021-06-12 20:37:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:37:53,243 INFO L93 Difference]: Finished difference Result 296638 states and 645293 transitions. [2021-06-12 20:37:53,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:37:53,243 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 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 96 [2021-06-12 20:37:53,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:37:53,602 INFO L225 Difference]: With dead ends: 296638 [2021-06-12 20:37:53,602 INFO L226 Difference]: Without dead ends: 296566 [2021-06-12 20:37:53,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:37:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296566 states. [2021-06-12 20:37:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296566 to 282646. [2021-06-12 20:37:57,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.1860107201613332) internal successors, (617865), 282645 states have internal predecessors, (617865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:37:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617865 transitions. [2021-06-12 20:37:58,958 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617865 transitions. Word has length 96 [2021-06-12 20:37:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:37:58,958 INFO L482 AbstractCegarLoop]: Abstraction has 282646 states and 617865 transitions. [2021-06-12 20:37:58,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 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) [2021-06-12 20:37:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617865 transitions. [2021-06-12 20:37:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:37:59,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:37:59,223 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:37:59,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:37:59,437 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:37:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:37:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1564912452, now seen corresponding path program 152 times [2021-06-12 20:37:59,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:37:59,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711269535] [2021-06-12 20:37:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:37:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:37:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-12 20:37:59,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:37:59,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711269535] [2021-06-12 20:37:59,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711269535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:37:59,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068976364] [2021-06-12 20:37:59,913 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 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 [2021-06-12 20:37:59,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:37:59,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:37:59,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:37:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-06-12 20:38:00,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068976364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:00,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:00,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 20:38:00,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794197643] [2021-06-12 20:38:00,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 20:38:00,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:00,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 20:38:00,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 20:38:00,103 INFO L87 Difference]: Start difference. First operand 282646 states and 617865 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 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) [2021-06-12 20:38:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:01,416 INFO L93 Difference]: Finished difference Result 298171 states and 649070 transitions. [2021-06-12 20:38:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 20:38:01,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 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 96 [2021-06-12 20:38:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:01,974 INFO L225 Difference]: With dead ends: 298171 [2021-06-12 20:38:01,974 INFO L226 Difference]: Without dead ends: 298171 [2021-06-12 20:38:01,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:38:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298171 states. [2021-06-12 20:38:06,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298171 to 282022. [2021-06-12 20:38:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282022 states, 282021 states have (on average 2.1855925622560024) internal successors, (616383), 282021 states have internal predecessors, (616383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282022 states to 282022 states and 616383 transitions. [2021-06-12 20:38:07,400 INFO L78 Accepts]: Start accepts. Automaton has 282022 states and 616383 transitions. Word has length 96 [2021-06-12 20:38:07,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:07,400 INFO L482 AbstractCegarLoop]: Abstraction has 282022 states and 616383 transitions. [2021-06-12 20:38:07,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 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) [2021-06-12 20:38:07,400 INFO L276 IsEmpty]: Start isEmpty. Operand 282022 states and 616383 transitions. [2021-06-12 20:38:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:38:08,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:08,092 INFO L472 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:08,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:08,297 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:08,297 INFO L82 PathProgramCache]: Analyzing trace with hash -64413626, now seen corresponding path program 153 times [2021-06-12 20:38:08,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:08,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667198458] [2021-06-12 20:38:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 124 proven. 183 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-06-12 20:38:08,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667198458] [2021-06-12 20:38:08,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667198458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:08,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031790698] [2021-06-12 20:38:08,337 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 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 [2021-06-12 20:38:08,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 20:38:08,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:08,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 20:38:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:08,596 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-06-12 20:38:08,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031790698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:08,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:08,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 22 [2021-06-12 20:38:08,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29645635] [2021-06-12 20:38:08,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:38:08,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:08,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:38:08,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:38:08,596 INFO L87 Difference]: Start difference. First operand 282022 states and 616383 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:10,833 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 20:38:12,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:12,142 INFO L93 Difference]: Finished difference Result 527818 states and 1143066 transitions. [2021-06-12 20:38:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-06-12 20:38:12,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-06-12 20:38:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:12,906 INFO L225 Difference]: With dead ends: 527818 [2021-06-12 20:38:12,906 INFO L226 Difference]: Without dead ends: 527644 [2021-06-12 20:38:12,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 1290.6ms TimeCoverageRelationStatistics Valid=1106, Invalid=12004, Unknown=0, NotChecked=0, Total=13110 [2021-06-12 20:38:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527644 states. [2021-06-12 20:38:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527644 to 396232. [2021-06-12 20:38:20,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396232 states, 396231 states have (on average 2.1780552253609637) internal successors, (863013), 396231 states have internal predecessors, (863013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:22,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396232 states to 396232 states and 863013 transitions. [2021-06-12 20:38:22,737 INFO L78 Accepts]: Start accepts. Automaton has 396232 states and 863013 transitions. Word has length 96 [2021-06-12 20:38:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:22,738 INFO L482 AbstractCegarLoop]: Abstraction has 396232 states and 863013 transitions. [2021-06-12 20:38:22,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:22,738 INFO L276 IsEmpty]: Start isEmpty. Operand 396232 states and 863013 transitions. [2021-06-12 20:38:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:38:23,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:23,021 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:23,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:23,244 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1559341669, now seen corresponding path program 154 times [2021-06-12 20:38:23,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:23,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952472773] [2021-06-12 20:38:23,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 20:38:23,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952472773] [2021-06-12 20:38:23,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952472773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:23,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912623779] [2021-06-12 20:38:23,306 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 [2021-06-12 20:38:23,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:38:23,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:23,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:38:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:23,853 WARN L205 SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-12 20:38:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-06-12 20:38:24,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912623779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:24,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:24,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:38:24,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416920511] [2021-06-12 20:38:24,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:38:24,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:24,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:38:24,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:38:24,034 INFO L87 Difference]: Start difference. First operand 396232 states and 863013 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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) [2021-06-12 20:38:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:25,839 INFO L93 Difference]: Finished difference Result 407321 states and 884626 transitions. [2021-06-12 20:38:25,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:38:25,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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 96 [2021-06-12 20:38:25,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:26,718 INFO L225 Difference]: With dead ends: 407321 [2021-06-12 20:38:26,718 INFO L226 Difference]: Without dead ends: 407255 [2021-06-12 20:38:26,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407255 states. [2021-06-12 20:38:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407255 to 401628. [2021-06-12 20:38:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401628 states, 401627 states have (on average 2.1796965841439944) internal successors, (875425), 401627 states have internal predecessors, (875425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401628 states to 401628 states and 875425 transitions. [2021-06-12 20:38:33,833 INFO L78 Accepts]: Start accepts. Automaton has 401628 states and 875425 transitions. Word has length 96 [2021-06-12 20:38:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:33,833 INFO L482 AbstractCegarLoop]: Abstraction has 401628 states and 875425 transitions. [2021-06-12 20:38:33,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 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) [2021-06-12 20:38:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 401628 states and 875425 transitions. [2021-06-12 20:38:34,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:38:34,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:34,764 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:34,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:38:34,988 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:34,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:34,988 INFO L82 PathProgramCache]: Analyzing trace with hash 408916935, now seen corresponding path program 155 times [2021-06-12 20:38:34,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:34,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777806285] [2021-06-12 20:38:34,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:38:35,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:35,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777806285] [2021-06-12 20:38:35,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777806285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:35,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304839366] [2021-06-12 20:38:35,051 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 [2021-06-12 20:38:35,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 20:38:35,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:35,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:38:35,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:38:35,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304839366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:35,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:35,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:38:35,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539618005] [2021-06-12 20:38:35,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:38:35,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:35,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:38:35,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:38:35,230 INFO L87 Difference]: Start difference. First operand 401628 states and 875425 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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) [2021-06-12 20:38:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:37,257 INFO L93 Difference]: Finished difference Result 427365 states and 929947 transitions. [2021-06-12 20:38:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:38:37,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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 96 [2021-06-12 20:38:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:38,411 INFO L225 Difference]: With dead ends: 427365 [2021-06-12 20:38:38,412 INFO L226 Difference]: Without dead ends: 427293 [2021-06-12 20:38:38,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427293 states. [2021-06-12 20:38:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427293 to 403688. [2021-06-12 20:38:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403688 states, 403687 states have (on average 2.1797308310646617) internal successors, (879929), 403687 states have internal predecessors, (879929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:46,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403688 states to 403688 states and 879929 transitions. [2021-06-12 20:38:46,972 INFO L78 Accepts]: Start accepts. Automaton has 403688 states and 879929 transitions. Word has length 96 [2021-06-12 20:38:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:46,972 INFO L482 AbstractCegarLoop]: Abstraction has 403688 states and 879929 transitions. [2021-06-12 20:38:46,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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) [2021-06-12 20:38:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 403688 states and 879929 transitions. [2021-06-12 20:38:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:38:47,205 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:38:47,205 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:38:47,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 20:38:47,405 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:38:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:38:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash -7602597, now seen corresponding path program 156 times [2021-06-12 20:38:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:38:47,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752234189] [2021-06-12 20:38:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:38:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:38:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:38:47,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:38:47,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752234189] [2021-06-12 20:38:47,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752234189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:47,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051904388] [2021-06-12 20:38:47,455 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 [2021-06-12 20:38:47,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 20:38:47,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:38:47,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:38:47,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:38:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:38:47,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051904388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:38:47,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:38:47,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:38:47,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905295358] [2021-06-12 20:38:47,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:38:47,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:38:47,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:38:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:38:47,605 INFO L87 Difference]: Start difference. First operand 403688 states and 879929 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:38:49,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:38:49,925 INFO L93 Difference]: Finished difference Result 425634 states and 925391 transitions. [2021-06-12 20:38:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:38:49,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:38:49,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:38:50,903 INFO L225 Difference]: With dead ends: 425634 [2021-06-12 20:38:50,903 INFO L226 Difference]: Without dead ends: 425592 [2021-06-12 20:38:50,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:38:51,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425592 states. [2021-06-12 20:38:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425592 to 412428. [2021-06-12 20:38:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412428 states, 412427 states have (on average 2.1807131928801944) internal successors, (899385), 412427 states have internal predecessors, (899385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:38:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412428 states to 412428 states and 899385 transitions. [2021-06-12 20:38:59,369 INFO L78 Accepts]: Start accepts. Automaton has 412428 states and 899385 transitions. Word has length 96 [2021-06-12 20:38:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:38:59,370 INFO L482 AbstractCegarLoop]: Abstraction has 412428 states and 899385 transitions. [2021-06-12 20:38:59,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:38:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 412428 states and 899385 transitions. [2021-06-12 20:39:00,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:39:00,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:00,240 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:00,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 20:39:00,447 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash 297123023, now seen corresponding path program 157 times [2021-06-12 20:39:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:00,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934944500] [2021-06-12 20:39:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:39:00,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:00,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934944500] [2021-06-12 20:39:00,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934944500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:00,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575291236] [2021-06-12 20:39:00,504 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 [2021-06-12 20:39:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:00,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:39:00,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:39:00,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575291236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:00,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:00,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:39:00,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288295562] [2021-06-12 20:39:00,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:39:00,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:00,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:39:00,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:39:00,656 INFO L87 Difference]: Start difference. First operand 412428 states and 899385 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:39:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:02,634 INFO L93 Difference]: Finished difference Result 439240 states and 953108 transitions. [2021-06-12 20:39:02,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:39:02,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:39:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:03,221 INFO L225 Difference]: With dead ends: 439240 [2021-06-12 20:39:03,221 INFO L226 Difference]: Without dead ends: 439240 [2021-06-12 20:39:03,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:39:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439240 states. [2021-06-12 20:39:09,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439240 to 412684. [2021-06-12 20:39:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412684 states, 412683 states have (on average 2.1804266228557996) internal successors, (899825), 412683 states have internal predecessors, (899825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:12,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412684 states to 412684 states and 899825 transitions. [2021-06-12 20:39:12,489 INFO L78 Accepts]: Start accepts. Automaton has 412684 states and 899825 transitions. Word has length 96 [2021-06-12 20:39:12,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:12,489 INFO L482 AbstractCegarLoop]: Abstraction has 412684 states and 899825 transitions. [2021-06-12 20:39:12,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:39:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 412684 states and 899825 transitions. [2021-06-12 20:39:12,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:39:12,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:12,852 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:13,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 20:39:13,065 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:13,065 INFO L82 PathProgramCache]: Analyzing trace with hash 687326949, now seen corresponding path program 158 times [2021-06-12 20:39:13,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:13,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888431735] [2021-06-12 20:39:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:39:13,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:13,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888431735] [2021-06-12 20:39:13,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888431735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:13,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250811401] [2021-06-12 20:39:13,138 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 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 [2021-06-12 20:39:13,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:39:13,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:13,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:39:13,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:39:13,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250811401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:13,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:13,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 20:39:13,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385455428] [2021-06-12 20:39:13,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:39:13,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:39:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:39:13,326 INFO L87 Difference]: Start difference. First operand 412684 states and 899825 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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) [2021-06-12 20:39:13,851 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-06-12 20:39:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:16,039 INFO L93 Difference]: Finished difference Result 495432 states and 1073586 transitions. [2021-06-12 20:39:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:39:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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 96 [2021-06-12 20:39:16,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:17,491 INFO L225 Difference]: With dead ends: 495432 [2021-06-12 20:39:17,491 INFO L226 Difference]: Without dead ends: 495432 [2021-06-12 20:39:17,491 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=250, Invalid=400, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:39:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495432 states. [2021-06-12 20:39:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495432 to 413220. [2021-06-12 20:39:24,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413220 states, 413219 states have (on average 2.1798634622318915) internal successors, (900761), 413219 states have internal predecessors, (900761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:27,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413220 states to 413220 states and 900761 transitions. [2021-06-12 20:39:27,044 INFO L78 Accepts]: Start accepts. Automaton has 413220 states and 900761 transitions. Word has length 96 [2021-06-12 20:39:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:27,044 INFO L482 AbstractCegarLoop]: Abstraction has 413220 states and 900761 transitions. [2021-06-12 20:39:27,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 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) [2021-06-12 20:39:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 413220 states and 900761 transitions. [2021-06-12 20:39:27,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:39:27,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:27,371 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:27,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:27,585 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:27,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2140191879, now seen corresponding path program 159 times [2021-06-12 20:39:27,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:27,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279508345] [2021-06-12 20:39:27,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:39:27,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:27,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279508345] [2021-06-12 20:39:27,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279508345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:27,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512502505] [2021-06-12 20:39:27,670 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 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 [2021-06-12 20:39:27,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 20:39:27,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:27,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:39:27,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:39:27,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512502505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:27,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:27,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 20:39:27,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473666553] [2021-06-12 20:39:27,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 20:39:27,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:27,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 20:39:27,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 20:39:27,856 INFO L87 Difference]: Start difference. First operand 413220 states and 900761 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 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) [2021-06-12 20:39:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:30,692 INFO L93 Difference]: Finished difference Result 497004 states and 1077768 transitions. [2021-06-12 20:39:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:39:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 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 96 [2021-06-12 20:39:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:31,952 INFO L225 Difference]: With dead ends: 497004 [2021-06-12 20:39:31,952 INFO L226 Difference]: Without dead ends: 497004 [2021-06-12 20:39:31,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=307, Invalid=505, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:39:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497004 states. [2021-06-12 20:39:38,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497004 to 413420. [2021-06-12 20:39:39,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413420 states, 413419 states have (on average 2.179457160894879) internal successors, (901029), 413419 states have internal predecessors, (901029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413420 states to 413420 states and 901029 transitions. [2021-06-12 20:39:41,931 INFO L78 Accepts]: Start accepts. Automaton has 413420 states and 901029 transitions. Word has length 96 [2021-06-12 20:39:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:41,931 INFO L482 AbstractCegarLoop]: Abstraction has 413420 states and 901029 transitions. [2021-06-12 20:39:41,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 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) [2021-06-12 20:39:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 413420 states and 901029 transitions. [2021-06-12 20:39:42,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:39:42,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:42,274 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:42,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 20:39:42,489 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash 278720613, now seen corresponding path program 160 times [2021-06-12 20:39:42,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:42,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350813653] [2021-06-12 20:39:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:39:42,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:42,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350813653] [2021-06-12 20:39:42,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350813653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:42,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495663374] [2021-06-12 20:39:42,585 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 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 [2021-06-12 20:39:42,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:39:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:42,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:39:42,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:39:42,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495663374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:42,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:42,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 20:39:42,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894807867] [2021-06-12 20:39:42,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 20:39:42,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:42,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 20:39:42,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 20:39:42,781 INFO L87 Difference]: Start difference. First operand 413420 states and 901029 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 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) [2021-06-12 20:39:43,316 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-12 20:39:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:45,598 INFO L93 Difference]: Finished difference Result 465380 states and 1009820 transitions. [2021-06-12 20:39:45,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:39:45,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 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 96 [2021-06-12 20:39:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:39:46,891 INFO L225 Difference]: With dead ends: 465380 [2021-06-12 20:39:46,891 INFO L226 Difference]: Without dead ends: 465380 [2021-06-12 20:39:46,892 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 667.6ms TimeCoverageRelationStatistics Valid=321, Invalid=549, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:39:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465380 states. [2021-06-12 20:39:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465380 to 414060. [2021-06-12 20:39:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414060 states, 414059 states have (on average 2.1791797787271863) internal successors, (902309), 414059 states have internal predecessors, (902309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:39:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414060 states to 414060 states and 902309 transitions. [2021-06-12 20:39:56,122 INFO L78 Accepts]: Start accepts. Automaton has 414060 states and 902309 transitions. Word has length 96 [2021-06-12 20:39:56,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:39:56,122 INFO L482 AbstractCegarLoop]: Abstraction has 414060 states and 902309 transitions. [2021-06-12 20:39:56,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 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) [2021-06-12 20:39:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand 414060 states and 902309 transitions. [2021-06-12 20:39:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:39:56,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:39:56,466 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:39:56,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:39:56,681 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:39:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:39:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash 553698183, now seen corresponding path program 161 times [2021-06-12 20:39:56,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:39:56,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069433114] [2021-06-12 20:39:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:39:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:39:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:56,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:39:56,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069433114] [2021-06-12 20:39:56,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069433114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:56,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722054463] [2021-06-12 20:39:56,779 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 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 [2021-06-12 20:39:56,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 20:39:56,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:39:56,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:39:56,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:39:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:39:56,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722054463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:39:56,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:39:56,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 20:39:56,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721394219] [2021-06-12 20:39:56,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 20:39:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:39:56,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 20:39:56,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 20:39:56,979 INFO L87 Difference]: Start difference. First operand 414060 states and 902309 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 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) [2021-06-12 20:39:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:39:59,554 INFO L93 Difference]: Finished difference Result 430906 states and 940689 transitions. [2021-06-12 20:39:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:39:59,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 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 96 [2021-06-12 20:39:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:00,750 INFO L225 Difference]: With dead ends: 430906 [2021-06-12 20:40:00,751 INFO L226 Difference]: Without dead ends: 430906 [2021-06-12 20:40:00,751 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:40:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430906 states. [2021-06-12 20:40:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430906 to 401228. [2021-06-12 20:40:07,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401228 states, 401227 states have (on average 2.1776525508004196) internal successors, (873733), 401227 states have internal predecessors, (873733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401228 states to 401228 states and 873733 transitions. [2021-06-12 20:40:09,517 INFO L78 Accepts]: Start accepts. Automaton has 401228 states and 873733 transitions. Word has length 96 [2021-06-12 20:40:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:09,517 INFO L482 AbstractCegarLoop]: Abstraction has 401228 states and 873733 transitions. [2021-06-12 20:40:09,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 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) [2021-06-12 20:40:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 401228 states and 873733 transitions. [2021-06-12 20:40:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:40:10,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:10,341 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:10,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:10,565 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:10,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:10,566 INFO L82 PathProgramCache]: Analyzing trace with hash 449615781, now seen corresponding path program 162 times [2021-06-12 20:40:10,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:10,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796563332] [2021-06-12 20:40:10,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:40:10,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:10,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796563332] [2021-06-12 20:40:10,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796563332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:10,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142293323] [2021-06-12 20:40:10,654 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 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 [2021-06-12 20:40:10,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 20:40:10,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:40:10,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:40:10,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 20:40:10,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142293323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:10,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:10,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:40:10,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847517360] [2021-06-12 20:40:10,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:40:10,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:10,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:40:10,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:40:10,838 INFO L87 Difference]: Start difference. First operand 401228 states and 873733 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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) [2021-06-12 20:40:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:13,195 INFO L93 Difference]: Finished difference Result 424850 states and 924011 transitions. [2021-06-12 20:40:13,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:40:13,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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 96 [2021-06-12 20:40:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:14,108 INFO L225 Difference]: With dead ends: 424850 [2021-06-12 20:40:14,108 INFO L226 Difference]: Without dead ends: 424778 [2021-06-12 20:40:14,108 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424778 states. [2021-06-12 20:40:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424778 to 401892. [2021-06-12 20:40:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401892 states, 401891 states have (on average 2.1778666354807648) internal successors, (875265), 401891 states have internal predecessors, (875265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401892 states to 401892 states and 875265 transitions. [2021-06-12 20:40:23,674 INFO L78 Accepts]: Start accepts. Automaton has 401892 states and 875265 transitions. Word has length 96 [2021-06-12 20:40:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:40:23,674 INFO L482 AbstractCegarLoop]: Abstraction has 401892 states and 875265 transitions. [2021-06-12 20:40:23,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 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) [2021-06-12 20:40:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 401892 states and 875265 transitions. [2021-06-12 20:40:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-06-12 20:40:23,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:40:23,989 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:40:24,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:40:24,205 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:40:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:40:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash -198417829, now seen corresponding path program 163 times [2021-06-12 20:40:24,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:40:24,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718408574] [2021-06-12 20:40:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:40:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:40:24,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:40:24,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718408574] [2021-06-12 20:40:24,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718408574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:24,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126431128] [2021-06-12 20:40:24,300 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 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 [2021-06-12 20:40:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:40:24,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 20:40:24,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:40:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:40:24,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126431128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:40:24,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:40:24,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 20:40:24,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510854585] [2021-06-12 20:40:24,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:40:24,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:40:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:40:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:40:24,479 INFO L87 Difference]: Start difference. First operand 401892 states and 875265 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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) [2021-06-12 20:40:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:40:26,922 INFO L93 Difference]: Finished difference Result 419176 states and 910606 transitions. [2021-06-12 20:40:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:40:26,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 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 96 [2021-06-12 20:40:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:40:27,822 INFO L225 Difference]: With dead ends: 419176 [2021-06-12 20:40:27,822 INFO L226 Difference]: Without dead ends: 419134 [2021-06-12 20:40:27,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:40:28,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419134 states. Received shutdown request... [2021-06-12 20:40:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419134 to 407336. [2021-06-12 20:40:34,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407336 states, 407335 states have (on average 2.1785532792419016) internal successors, (887401), 407335 states have internal predecessors, (887401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:40:34,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-12 20:40:34,733 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 20:40:34,735 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 20:40:34,736 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 20:40:34,737 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 08:40:34 BasicIcfg [2021-06-12 20:40:34,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 20:40:34,737 INFO L168 Benchmark]: Toolchain (without parser) took 597955.42 ms. Allocated memory was 179.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 159.3 MB in the beginning and 4.1 GB in the end (delta: -4.0 GB). Peak memory consumption was 4.0 GB. Max. memory is 8.0 GB. [2021-06-12 20:40:34,737 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 179.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:40:34,737 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.91 ms. Allocated memory is still 179.3 MB. Free memory was 159.2 MB in the beginning and 157.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:40:34,737 INFO L168 Benchmark]: Boogie Preprocessor took 14.69 ms. Allocated memory is still 179.3 MB. Free memory was 157.7 MB in the beginning and 156.8 MB in the end (delta: 920.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:40:34,737 INFO L168 Benchmark]: RCFGBuilder took 236.54 ms. Allocated memory is still 179.3 MB. Free memory was 156.7 MB in the beginning and 145.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 20:40:34,737 INFO L168 Benchmark]: TraceAbstraction took 597675.13 ms. Allocated memory was 179.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 145.2 MB in the beginning and 4.1 GB in the end (delta: -4.0 GB). Peak memory consumption was 4.0 GB. Max. memory is 8.0 GB. [2021-06-12 20:40:34,738 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 0.14 ms. Allocated memory is still 179.3 MB. Free memory is still 160.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.91 ms. Allocated memory is still 179.3 MB. Free memory was 159.2 MB in the beginning and 157.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.69 ms. Allocated memory is still 179.3 MB. Free memory was 157.7 MB in the beginning and 156.8 MB in the end (delta: 920.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 236.54 ms. Allocated memory is still 179.3 MB. Free memory was 156.7 MB in the beginning and 145.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 597675.13 ms. Allocated memory was 179.3 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 145.2 MB in the beginning and 4.1 GB in the end (delta: -4.0 GB). Peak memory consumption was 4.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 44 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 597590.4ms, OverallIterations: 176, TraceHistogramMax: 11, EmptinessCheckTime: 19746.0ms, AutomataDifference: 147641.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13273 SDtfs, 43568 SDslu, 57234 SDs, 0 SdLazy, 26777 SolverSat, 4440 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15184.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14705 GetRequests, 11532 SyntacticMatches, 94 SemanticMatches, 3079 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26520 ImplicationChecksByTransitivity, 23868.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=414060occurred in iteration=173, InterpolantAutomatonStates: 3054, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 353761.2ms AutomataMinimizationTime, 176 MinimizatonAttempts, 1671696 StatesRemovedByMinimization, 175 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 756.8ms SsaConstructionTime, 2878.8ms SatisfiabilityAnalysisTime, 31889.1ms InterpolantComputationTime, 22216 NumberOfCodeBlocks, 22150 NumberOfCodeBlocksAsserted, 927 NumberOfCheckSat, 21870 ConstructedInterpolants, 0 QuantifiedInterpolants, 96937 SizeOfPredicates, 342 NumberOfNonLiveVariables, 17177 ConjunctsInSsa, 2383 ConjunctsInUnsatCore, 346 InterpolantComputations, 6 PerfectInterpolantSequences, 25216/47032 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